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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549 
______________________________
FORM 10-Q 
______________________________
ý
QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the quarterly period ended September 30, 2018
or 
¨
TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from  ________ to ________                     
Commission File Number: 1-13245
______________________________ 
PIONEER NATURAL RESOURCES COMPANY
(Exact name of Registrant as specified in its charter)
______________________________
Delaware
 
75-2702753
(State or other jurisdiction of
incorporation or organization)
 
(I.R.S. Employer
Identification No.)
 
 
5205 N. O'Connor Blvd., Suite 200, Irving, Texas
 
75039
(Address of principal executive offices)
 
(Zip Code)
(972) 444-9001
(Registrant's telephone number, including area code)
Not applicable
(Former name, former address and former fiscal year, if changed since last report) 
______________________________
Indicate by check mark whether the Registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.     Yes  ý    No  ¨
Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    
Yes   ý    No   ¨
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act. 
Large accelerated filer
 
ý
  
Accelerated filer
 
¨
 
 
 
 
Non-accelerated filer
 
o (Do not check if a smaller reporting company)
  
Smaller reporting company
 
¨
 
 
 
 
 
 
 
 
 
 
 
Emerging growth company
 
¨
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.    ¨    
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).
Yes   ¨    No  ý
Number of shares of Common Stock outstanding as of November 5, 2018                               170,462,089


Table of Contents

PIONEER NATURAL RESOURCES COMPANY
TABLE OF CONTENTS 
 
 
Page
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

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Table of Contents

PIONEER NATURAL RESOURCES COMPANY
Cautionary Statement Concerning Forward-Looking Statements
The information in this Quarterly Report on Form 10-Q (this "Report") contains forward-looking statements that involve risks and uncertainties. When used in this document, the words "believes," "plans," "expects," "anticipates," "forecasts," "intends," "continue," "may," "will," "could," "should," "future," "potential," "estimate" or the negative of such terms and similar expressions as they relate to Pioneer Natural Resources Company ("Pioneer" or the "Company") are intended to identify forward-looking statements, which are generally not historical in nature. The forward-looking statements are based on the Company's current expectations, assumptions, estimates and projections about the Company and the industry in which the Company operates. Although the Company believes that the expectations and assumptions reflected in the forward-looking statements are reasonable as and when made, they involve risks and uncertainties that are difficult to predict and, in many cases, beyond the Company's control.
These risks and uncertainties include, among other things, volatility of commodity prices, product supply and demand, competition, the ability to obtain environmental and other permits and the timing thereof, other government regulation or action, the ability to obtain approvals from third parties and negotiate agreements with third parties on mutually acceptable terms, completion of planned divestitures, litigation, the costs and results of drilling and operations, availability of equipment, services, resources and personnel required to perform the Company's drilling and operating activities, access to and availability of transportation, processing, fractionation, refining and export facilities, Pioneer's ability to replace reserves, implement its business plans or complete its development activities as scheduled, access to and cost of capital, the financial strength of counterparties to Pioneer's credit facility, investment instruments and derivative contracts and purchasers of Pioneer's oil, NGL and gas production, uncertainties about estimates of reserves, identification of drilling locations and the ability to add proved reserves in the future, the assumptions underlying production forecasts, quality of technical data, environmental and weather risks, including the possible impacts of climate change, cybersecurity risks, ability to implement planned stock repurchases, the risks associated with the ownership and operation of the Company's industrial sand mining and oilfield services businesses and acts of war or terrorism. These and other risks are described in the Company's Annual Report on Form 10-K, this and other Quarterly Reports on Form 10-Q and other filings with the United States Securities and Exchange Commission. In addition, the Company may be subject to currently unforeseen risks that may have a materially adverse effect on it. Accordingly, no assurances can be given that the actual events and results will not be materially different than the anticipated results described in the forward-looking statements. See "Part I, Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations," "Part 1, Item 3. Quantitative and Qualitative Disclosures About Market Risk" and "Part II, Item 1A. Risk Factors" in this Report and "Part I, Item 1. Business — Competition, Markets and Regulations," "Part I, Item 1A. Risk Factors," "Part II, Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations" and "Part II, Item 7A. Quantitative and Qualitative Disclosures About Market Risk" in the Company's Annual Report on Form 10-K for the year ended December 31, 2017 for a description of various factors that could materially affect the ability of Pioneer to achieve the anticipated results described in the forward-looking statements. Readers are cautioned not to place undue reliance on forward-looking statements, which speak only as of the date hereof. The Company undertakes no duty to publicly update these statements except as required by law.

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Table of Contents

PIONEER NATURAL RESOURCES COMPANY
Definitions of Certain Terms and Conventions Used Herein
Within this Report, the following terms and conventions have specific meanings:
"Bbl" means a standard barrel containing 42 United States gallons.
"BOE" means a barrel of oil equivalent and is a standard convention used to express oil and gas volumes on a comparable oil equivalent basis. Gas equivalents are determined under the relative energy content method by using the ratio of six thousand cubic feet of gas to one Bbl of oil or natural gas liquid.
"BOEPD" means BOE per day.
"Btu" means British thermal unit, which is a measure of the amount of energy required to raise the temperature of one pound of water one degree Fahrenheit.
"Conway" means the daily average natural gas liquids components as priced in Oil Price Information Service ("OPIS") in the table "U.S. and Canada LP – Gas Weekly Averages" at Conway, Kansas.
"DD&A" means depletion, depreciation and amortization.
"GAAP" means accounting principles that are generally accepted in the United States of America.
"HH" means Henry Hub, a gas distribution hub in Louisiana that serves as the delivery location for gas futures contracts on the NYMEX.
"LIBOR" means London Interbank Offered Rate, which is a market rate of interest.
"LLS" means Louisiana Light Sweet oil, a light, sweet blend of oil produced from the Gulf of Mexico.
"Mcf" means one thousand cubic feet and is a measure of gas volume.
"MMBtu" means one million Btus.
"Mont Belvieu" means the daily average natural gas liquids components as priced in OPIS in the table "U.S. and Canada LP – Gas Weekly Averages" at Mont Belvieu, Texas.
"NGL" means natural gas liquid.
"NYMEX" means the New York Mercantile Exchange.
"Pioneer" or the "Company" means Pioneer Natural Resources Company and its subsidiaries.
"Proved reserves" mean the quantities of oil and gas, which, by analysis of geoscience and engineering data, can be estimated with reasonable certainty to be economically producible – from a given date forward, from known reservoirs, and under existing economic conditions, operating methods, and government regulations – prior to the time at which contracts providing the right to operate expire, unless evidence indicates that renewal is reasonably certain, regardless of whether deterministic or probabilistic methods are used for the estimation. The project to extract the hydrocarbons must have commenced or the operator must be reasonably certain that it will commence the project within a reasonable time.
(i) The area of the reservoir considered as proved includes: (A) The area identified by drilling and limited by fluid contacts, if any, and (B) Adjacent undrilled portions of the reservoir that can, with reasonable certainty, be judged to be continuous with it and to contain economically producible oil or gas on the basis of available geoscience and engineering data.
(ii) In the absence of data on fluid contacts, proved quantities in a reservoir are limited by the lowest known hydrocarbons ("LKH") as seen in a well penetration unless geoscience, engineering, or performance data and reliable technology establishes a lower contact with reasonable certainty.
(iii) Where direct observation from well penetrations has defined a highest known oil ("HKO") elevation and the potential exists for an associated gas cap, proved oil reserves may be assigned in the structurally higher portions of the reservoir only if geoscience, engineering, or performance data and reliable technology establish the higher contact with reasonable certainty.
(iv) Reserves which can be produced economically through application of improved recovery techniques (including, but not limited to, fluid injection) are included in the proved classification when: (A) Successful testing by a pilot project in an area of the reservoir with properties no more favorable than in the reservoir as a whole, the operation of an installed program in the reservoir or an analogous reservoir, or other evidence using reliable technology establishes the reasonable certainty of the engineering analysis on which the project or program was based; and (B) The project has been approved for development by all necessary parties and entities, including governmental entities.
(v) Existing economic conditions include prices and costs at which economic producibility from a reservoir is to be determined. The price shall be the average during the 12-month period prior to the ending date of the period covered by the report, determined as an unweighted arithmetic average of the first-day-of-the-month price for each month within such period, unless prices are defined by contractual arrangements, excluding escalations based upon future conditions.
"U.S." means United States.
With respect to information on the working interest in wells, drilling locations and acreage, "net" wells, drilling locations and acres are determined by multiplying "gross" wells, drilling locations and acres by the Company's working interest in such wells, drilling locations or acres. Unless otherwise specified, wells, drilling locations and acreage statistics quoted herein represent gross wells, drilling locations or acres.
Unless otherwise indicated, all currency amounts are expressed in U.S. dollars.
"WTI" means West Texas Intermediate oil, a light, sweet blend of oil produced from the fields in western Texas.

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Table of Contents

PART I. FINANCIAL INFORMATION
Item 1. Financial Statements
PIONEER NATURAL RESOURCES COMPANY
CONSOLIDATED BALANCE SHEETS
(in millions)
 
 
September 30,
2018
 
December 31,
2017
 
(Unaudited)
 
 
ASSETS
Current assets:
 
 
 
Cash and cash equivalents
$
919

 
$
896

Short-term investments
557

 
1,213

Accounts receivable:
 
 
 
Trade, net
876

 
644

Due from affiliates

 
1

Income taxes receivable
7

 
7

Inventories
269

 
212

Derivatives
1

 
11

Other
31

 
23

Total current assets
2,660

 
3,007

Property, plant and equipment, at cost:
 
 
 
Oil and gas properties, using the successful efforts method of accounting:
 
 
 
Proved properties
20,173

 
20,404

Unproved properties
586

 
558

Accumulated depletion, depreciation and amortization
(7,828
)
 
(9,196
)
Total property, plant and equipment
12,931

 
11,766

Long-term investments
193

 
66

Goodwill
267

 
270

Other property and equipment, net
1,864

 
1,762

Other assets, net
109

 
132

 
$
18,024

 
$
17,003












The financial information included as of September 30, 2018 has been prepared by management
without audit by independent registered public accountants.
The accompanying notes are an integral part of these consolidated financial statements.

5

Table of Contents

PIONEER NATURAL RESOURCES COMPANY
CONSOLIDATED BALANCE SHEETS (continued)
(in millions, except share data) 

 
September 30,
2018
 
December 31,
2017
 
(Unaudited)
 
 
LIABILITIES AND EQUITY
Current liabilities:
 
 
 
Accounts payable:
 
 
 
Trade
$
1,447

 
$
1,174

Due to affiliates
108

 
108

Interest payable
25

 
59

Income taxes payable
2

 

Current portion of long-term debt

 
449

Derivatives
482

 
232

Other
161

 
106

Total current liabilities
2,225

 
2,128

Long-term debt
2,286

 
2,283

Derivatives
70

 
23

Deferred income taxes
1,064

 
899

Other liabilities
485

 
391

Equity:
 
 
 
Common stock, $.01 par value; 500,000,000 shares authorized; 174,307,471 and 173,796,743 shares issued as of September 30, 2018 and December 31, 2017, respectively
2

 
2

Additional paid-in capital
9,041

 
8,974

Treasury stock at cost: 3,845,568 and 3,608,132 shares as of September 30, 2018 and December 31, 2017, respectively
(296
)
 
(249
)
Retained earnings
3,147

 
2,547

Total equity attributable to common stockholders
11,894

 
11,274

Noncontrolling interests in consolidated subsidiaries

 
5

Total equity
11,894

 
11,279

Commitments and contingencies


 


 
$
18,024

 
$
17,003










The financial information included as of September 30, 2018 has been prepared by management
without audit by independent registered public accountants.
The accompanying notes are an integral part of these consolidated financial statements.

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Table of Contents

PIONEER NATURAL RESOURCES COMPANY
CONSOLIDATED STATEMENTS OF OPERATIONS
(in millions, except per share data)
(Unaudited) 
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
 
2018
 
2017
 
2018
 
2017
Revenues and other income:
 
 
 
 
 
 
 
Oil and gas
$
1,317

 
$
855

 
$
3,869

 
$
2,433

Sales of purchased oil and gas
1,141

 
428

 
3,306

 
1,094

Interest and other
10

 
17

 
40

 
44

Derivative gains (losses), net
(135
)
 
(133
)
 
(701
)
 
153

Gain on disposition of assets, net
143

 

 
226

 
205

 
2,476

 
1,167

 
6,740

 
3,929

Costs and expenses:
 
 
 
 
 
 
 
Oil and gas production
198

 
152

 
654

 
440

Production and ad valorem taxes
83

 
53

 
229

 
152

Depletion, depreciation and amortization
394

 
355

 
1,130

 
1,033

Purchased oil and gas
941

 
442

 
3,021

 
1,141

Impairment of oil and gas properties

 

 
77

 
285

Exploration and abandonments
20

 
18

 
83

 
78

General and administrative
96

 
81

 
282

 
245

Accretion of discount on asset retirement obligations
3

 
5

 
11

 
14

Interest
30

 
37

 
97

 
118

Other
182

 
58

 
316

 
176

 
1,947

 
1,201

 
5,900

 
3,682

Income (loss) before income taxes
529

 
(34
)
 
840

 
247

Income tax benefit (provision)
(118
)
 
11

 
(188
)
 
(79
)
Net income (loss)
411

 
(23
)
 
652

 
168

Net loss attributable to noncontrolling interests

 

 
3

 

Net income (loss) attributable to common stockholders
$
411

 
$
(23
)
 
$
655

 
$
168

 
 
 
 
 
 
 
 
Net income (loss) per share attributable to common shareholders:
 
 
 
 
 
 
 
Basic
$
2.40

 
$
(0.13
)
 
$
3.82

 
$
0.98

Diluted
$
2.39

 
$
(0.13
)
 
$
3.82

 
$
0.98

 
 
 
 
 
 
 
 
Basic and diluted weighted average shares outstanding
171

 
170

 
171

 
170

 
 
 
 
 
 
 
 
Dividends declared per share
$
0.16

 
$
0.04

 
$
0.32

 
$
0.08












The financial information included herein has been prepared by management
without audit by independent registered public accountants.
The accompanying notes are an integral part of these consolidated financial statements.

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Table of Contents

PIONEER NATURAL RESOURCES COMPANY
CONSOLIDATED STATEMENT OF EQUITY
(in millions, except share data and dividends per share)
(Unaudited)
 
 
 
 
Equity Attributable To Common Stockholders
 
 
 
 
 
Shares
Outstanding
 
Common
Stock
 
Additional
Paid-in
Capital
 
Treasury
Stock
 
Retained
Earnings
 
Noncontrolling
Interests
 
Total Equity
 
(in thousands)
 
 
 
 
 
 
 
 
 
 
 
 
Balance as of December 31, 2017
170,189

 
$
2

 
$
8,974

 
$
(249
)
 
$
2,547

 
$
5

 
$
11,279

Dividends declared ($0.32 per share)

 

 

 

 
(55
)
 

 
(55
)
Exercise of long-term incentive stock options and employee stock purchases
58

 

 
4

 
4

 

 

 
8

Purchases of treasury stock
(296
)
 

 

 
(51
)
 

 

 
(51
)
Compensation costs:
 
 
 
 
 
 
 
 
 
 
 
 
 
Vested compensation awards
511

 

 

 

 

 

 

Compensation costs included in net income

 

 
63

 

 

 

 
63

Sale of noncontrolling interest

 

 

 

 

 
(2
)
 
(2
)
Net income

 

 

 

 
655

 
(3
)
 
652

Balance as of September 30, 2018
170,462

 
$
2

 
$
9,041

 
$
(296
)
 
$
3,147

 
$

 
$
11,894











The financial information included herein has been prepared by management
without audit by independent registered public accountants.
The accompanying notes are an integral part of these consolidated financial statements.

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Table of Contents

PIONEER NATURAL RESOURCES COMPANY
CONSOLIDATED STATEMENTS OF CASH FLOWS
(in millions)
(Unaudited)
 
Nine Months Ended
September 30,
 
2018
 
2017
Cash flows from operating activities:
 
 
 
Net income
$
652

 
$
168

Adjustments to reconcile net income to net cash provided by operating activities:
 
 
 
Depletion, depreciation and amortization
1,130

 
1,033

Impairment of oil and gas properties
77

 
285

Impairment of inventory and other property and equipment
9

 
1

Exploration expenses, including dry holes
12

 
19

Deferred income taxes
186

 
79

Gain on disposition of assets, net
(226
)
 
(205
)
Accretion of discount on asset retirement obligations
11

 
14

Interest expense
4

 
4

Derivative related activity
307

 
(91
)
Amortization of stock-based compensation
63

 
61

Other
176

 
58

Change in operating assets and liabilities:
 
 
 
Accounts receivable
(233
)
 
(131
)
Income taxes receivable

 
2

Inventories
(70
)
 
(9
)
Investments
4

 
(2
)
Other current assets
(1
)
 
(4
)
Accounts payable
305

 
82

Interest payable
(34
)
 
(30
)
Income taxes payable
2

 

Other current liabilities
(46
)
 
(33
)
Net cash provided by operating activities
2,328

 
1,301

Cash flows from investing activities:
 
 
 
Proceeds from disposition of assets
383

 
347

Proceeds from investments
1,140

 
1,196

Purchase of investments
(618
)
 
(850
)
Additions to oil and gas properties
(2,495
)
 
(1,703
)
Additions to other assets and other property and equipment, net
(187
)
 
(252
)
Net cash used in investing activities
(1,777
)
 
(1,262
)
Cash flows from financing activities:
 
 
 
Principal payments on long-term debt
(450
)
 
(485
)
Exercise of long-term incentive plan stock options and employee stock purchases
8

 
7

Purchases of treasury stock
(51
)
 
(36
)
Payments of other liabilities
(8
)
 

Dividends paid
(27
)
 
(7
)
Net cash used in financing activities
(528
)
 
(521
)
Net increase (decrease) in cash and cash equivalents
23

 
(482
)
Cash and cash equivalents, beginning of period
896

 
1,118

Cash and cash equivalents, end of period
$
919

 
$
636





The financial information included herein has been prepared by management
without audit by independent registered public accountants.
The accompanying notes are an integral part of these consolidated financial statements.

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Table of Contents
PIONEER NATURAL RESOURCES COMPANY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
September 30, 2018
(Unaudited)


NOTE 1. Organization and Nature of Operations
Pioneer Natural Resources Company ("Pioneer" or the "Company") is a Delaware corporation whose common stock is listed and traded on the New York Stock Exchange. The Company is a large independent oil and gas exploration and production company that explores for, develops and produces oil, natural gas liquids ("NGLs") and gas within the United States, with operations primarily in the Permian Basin in West Texas.
In February 2018, the Company announced its intention to divest its properties in the South Texas, Raton and West Panhandle fields and focus its efforts and capital resources on its Permian Basin assets. Thus far into 2018, the Company has accomplished the following:
In April 2018, the Company completed the sale of approximately 10,200 net acres in the western portion of the Eagle Ford Shale ("West Eagle Ford Shale") to an unaffiliated third party for cash proceeds of $103 million, before normal closing adjustments.
In July 2018, the Company completed the sale of its assets in the Raton Basin to an unaffiliated third party for cash proceeds of $79 million, before normal closing adjustments.
In August 2018, the Company completed the sale of its assets in the West Panhandle field to an unaffiliated third party for cash proceeds of $201 million, before normal closing adjustments.
In October 2018, the Company entered into a purchase and sale agreement to sell approximately 2,900 net acres in the Sinor Nest (Lower Wilcox) field in South Texas to an unaffiliated third party for cash proceeds of $132 million, before normal closing adjustments.
See Note 3 for further information regarding the sale of the Company's West Eagle Ford Shale, Raton Basin and West Panhandle field assets and Note 16 for further information regarding the Company's sale of its Sinor Nest assets in South Texas.
No assurance can be given that the remaining planned divestiture of the Company's South Texas assets will be completed in accordance with the Company's plan or on terms and at prices acceptable to the Company.
NOTE 2. Basis of Presentation
Presentation. In the opinion of management, the consolidated financial statements of the Company as of September 30, 2018 and for the three and nine months ended September 30, 2018 and 2017 include all adjustments and accruals, consisting only of normal, recurring accrual adjustments, which are necessary for a fair presentation of the results for the interim periods. These interim results are not necessarily indicative of results for a full year.
Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles in the United States ("GAAP") have been condensed in or omitted from this report pursuant to the rules and regulations of the United States Securities and Exchange Commission (the "SEC"). These consolidated financial statements should be read together with the consolidated financial statements and notes thereto included in the Company's Annual Report on Form 10-K for the year ended December 31, 2017.
Certain reclassifications have been made to the 2017 financial statement and footnote amounts in order to conform to the 2018 presentation.
Accounting policy changes. During the second quarter of 2018, the Company made a voluntary change in accounting policy to account for its materials and supplies inventory on a weighted average cost basis, versus using the previous accounting policy of the first-in-first-out (“FIFO”) basis. The Company made this voluntary change in accounting policy because it believes this method is preferable, as the weighted average cost basis more closely aligns with the physical flow of material and supplies inventory and is more widely utilized in the oil and gas industry. This voluntary change in accounting policy did not have a material effect on the Company’s consolidated financial statements for prior periods. As such, prior periods have not been restated.
Adoption of new accounting standards. In January 2017, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2017-04, "Simplifying the Test of Goodwill Impairment." ASU 2017-04 simplifies the quantitative goodwill impairment test by eliminating the requirement to calculate the implied fair value of goodwill (step 2 of

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Table of Contents
PIONEER NATURAL RESOURCES COMPANY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
September 30, 2018
(Unaudited)

the current goodwill impairment test). Instead, a company would record an impairment charge based on the excess of a reporting unit's carrying value over its fair value (as measured in step 1 of the current goodwill impairment test). ASU 2017-04 is effective for fiscal years beginning after December 15, 2019, with early adoption permitted. In July 2018, the Company elected to early adopt this update. The adoption of ASU 2017-04 had no impact on the Company's consolidated financial statements. The Company will perform future goodwill impairment tests in accordance with ASU 2017-04.
In May 2014, the FASB issued ASU No. 2014-09 ("ASC 606"), "Revenue from Contracts with Customers," which supersedes the revenue recognition requirements in ASC 605, "Revenue Recognition" ("ASC 605"), and requires entities to recognize revenue when control of the promised goods or services is transferred to customers at an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The Company adopted ASC 606 as of January 1, 2018 using the modified retrospective transition method. See Note 11 for a discussion of the impact to the Company's recognition of revenue associated with the adoption of ASC 606.
In March 2016, the FASB issued ASU 2016-09, "Improvements to Employee Share-Based Payment Accounting." ASU 2016-09 simplifies several aspects of the accounting for share-based payment transactions, including accounting for income taxes, forfeitures and statutory tax withholding requirements, as well as certain classification changes in the statement of cash flows. The Company adopted this standard on January 1, 2017. See Note 14 for a discussion of the impact to the Company's income tax provision associated with the adoption of ASU 2016-09.
New accounting pronouncements. In February 2016, the FASB issued ASU 2016-02, "Leases." ASU 2016-02 requires the recognition of lease assets and lease liabilities by lessees for those leases currently classified as operating leases and makes certain changes to the accounting for lease expenses. This standard is effective for fiscal years beginning after December 15, 2018 and for interim periods beginning the following year. This ASU should be applied using a modified retrospective approach, and early adoption is permitted. This standard does not apply to leases to explore for or use minerals, oil or gas resources, including the right to explore for those natural resources and rights to use the land in which those natural resources are contained. Based on its current commitments, the Company anticipates it will be required to recognize lease assets and liabilities related to drilling rig commitments, certain equipment rentals and leases, certain surface use agreements and potentially other arrangements. The Company is evaluating the impact of the adoption of ASU 2016-02 on its consolidated results of operations, financial position and financial disclosures and developing any necessary control changes. The Company plans to apply certain practical expedients provided in ASU 2016-02 that, among other things, allow entities to not reassess contracts that commenced prior to adoption and to not recognize right of use assets and lease liabilities related to short-term leases.
NOTE 3. Acquisitions and Divestitures
Acquisitions
In September 2018, the Company (i) purchased from an unaffiliated third party an interest in sand reserves in West Texas for $17 million and (ii) entered into a long-term sand processing and supply agreement with the operator of the sand mine. This agreement secures a long-term supply of sand beginning in the first quarter of 2019. The sand mine operator will process and supply 30 million tons of processed sand to Pioneer over 15 years. The Company recorded its investment in these sand reserves to other property and equipment in the accompanying consolidated balance sheet during the third quarter of 2018.
Divestitures
In February 2018, the Company announced its intention to divest its properties in the South Texas, Raton and West Panhandle fields and focus its efforts and capital resources on its Permian Basin assets.
In April 2018, the Company completed the sale of approximately 10,200 net acres in the West Eagle Ford Shale to an unaffiliated third party for cash proceeds of $103 million, before normal closing adjustments. During the nine months ended September 30, 2018, the Company recognized a gain of $75 million associated with this divestiture. In conjunction with this divestiture, the Company reduced the carrying value of goodwill by $1 million, reflecting the portion of the Company's goodwill related to the assets sold.
In July 2018, the Company completed the sale of its Raton Basin assets to an unaffiliated third party for cash proceeds of $79 million, before normal closing adjustments. The Company recorded a noncash impairment charge of $77 million in June 2018 to reduce the carrying value of its Raton Basin assets to their estimated fair value less costs to sell as the assets were considered

11

Table of Contents
PIONEER NATURAL RESOURCES COMPANY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
September 30, 2018
(Unaudited)

held for sale. See Note 4 for additional information about the Raton Basin impairment charge. During the three and nine months ended September 30, 2018, the Company recognized a gain of $2 million associated with this divestiture. The Company recognized divestiture charges related to the Raton Basin sale of $117 million and $123 million in other expense during the three and nine months ended September 30, 2018, respectively, primarily attributable to employee severance costs and deficiency charges related to certain firm transportation contracts retained by the Company. Additionally, the Company reduced the carrying value of goodwill by $1 million, reflecting the portion of the Company's goodwill related to assets sold.
In August 2018, the Company completed the sale of its assets in the West Panhandle field to an unaffiliated third party for cash proceeds of $201 million, before normal closing adjustments. The assets sold represent all of the Company's interests in the field, including all of its producing wells and the associated infrastructure. Associated with this sale, the Company recognized a gain of $146 million and divestiture related charges of $6 million associated with employee severance costs during the three and nine months ended September 30, 2018. Additionally, the Company reduced the carrying value of goodwill by $1 million, reflecting the portion of the Company's goodwill related to the assets sold.
In its accompanying consolidated balance sheets as of September 30, 2018, the Company had divestiture related liabilities of $42 million and $68 million recorded in other current and noncurrent liabilities, respectively, associated with expected deficiency charges on firm transportation contracts retained by the Company and $10 million recorded in accounts payable - due to affiliates associated with employee severance payments. The Company had no divestiture related liabilities as of December 31, 2017.
No assurance can be given that the remaining planned divestiture of the Company's South Texas assets will be completed in accordance with the Company's plan or on terms and at prices acceptable to the Company.
In April 2017, the Company completed the sale of approximately 20,500 acres in the Martin County region of the Permian Basin, with net production of approximately 1,500 BOEPD, to an unaffiliated third party for cash proceeds of $264 million. The sale resulted in a gain of $194 million. In conjunction with this divestiture, the Company reduced the carrying value of goodwill by $2 million, reflecting the portion of the Company's goodwill related to the assets sold.
During the nine months ended September 30, 2017, the Company also completed the sales of other nonstrategic proved and unproved properties in the Permian Basin for cash proceeds of $75 million, which resulted in a gain of $12 million.
NOTE 4. Fair Value Measurements
Fair value is defined as the price that would be received to sell an asset or the price paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value measurements are based upon inputs that market participants use in pricing an asset or liability, which are characterized according to a hierarchy that prioritizes those inputs based on the degree to which they are observable. Observable inputs represent market data obtained from independent sources, whereas unobservable inputs reflect a company's own market assumptions, which are used if observable inputs are not reasonably available without undue cost and effort. The three input levels of the fair value hierarchy are as follows:
Level 1 – quoted prices for identical assets or liabilities in active markets.
Level 2 – quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (e.g., interest rates) and inputs derived principally from or corroborated by observable market data by correlation or other means.
Level 3 – unobservable inputs for the asset or liability.
Assets and liabilities measured at fair value on a recurring basis. The fair value input hierarchy level to which an asset or liability measurement in its entirety falls is determined based on the lowest level input that is significant to the measurement in its entirety.

12

Table of Contents
PIONEER NATURAL RESOURCES COMPANY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
September 30, 2018
(Unaudited)

 The following table presents the Company's assets and liabilities that are measured at fair value on a recurring basis as of September 30, 2018 and December 31, 2017 for each of the fair value hierarchy levels: 
 
Fair Value Measurement as of September 30, 2018 Using
 
 
 
Quoted Prices
in Active
Markets for
Identical
Assets
(Level 1)
 
Significant
Other
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
 
Fair Value as of September 30, 2018
 
(in millions)
Assets:
 
 
 
 
 
 
 
Commodity derivatives
$

 
$
1

 
$

 
$
1

Deferred compensation plan assets
90

 

 

 
90

Total assets
90

 
1

 

 
91

Liabilities:
 
 
 
 
 
 
 
Commodity derivatives

 
552

 

 
552

Total liabilities

 
552

 

 
552

Total recurring fair value measurements
$
90

 
$
(551
)
 
$

 
$
(461
)
 
Fair Value Measurement as of December 31, 2017 Using
 
 
 
Quoted Prices
in Active
Markets for
Identical
Assets
(Level 1)
 
Significant
Other
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
 
Fair value as of December 31, 2017
 
(in millions)
Assets:
 
 
 
 
 
 
 
Commodity derivatives
$

 
$
11

 
$

 
$
11

Deferred compensation plan assets
95

 

 

 
95

Total assets
95

 
11

 

 
106

Liabilities:
 
 
 
 
 
 
 
Commodity derivatives

 
255

 

 
255

Total liabilities

 
255

 

 
255

Total recurring fair value measurements
$
95

 
$
(244
)
 
$

 
$
(149
)
Commodity derivatives. The Company's commodity derivatives represent oil, NGL and gas swap contracts, collar contracts, collar contracts with short puts and basis swap contracts. The asset and liability measurements for the Company's commodity derivative contracts represent Level 2 inputs in the hierarchy. The Company utilizes discounted cash flow and option-pricing models for valuing its commodity derivatives.
The asset and liability values attributable to the Company's commodity derivatives were determined based on inputs that include (i) the contracted notional volumes, (ii) independent active market price quotes, (iii) the applicable estimated credit-adjusted risk-free rate yield curve and (iv) the implied rate of volatility inherent in the collar contracts and collar contracts with short puts, which is based on active and independent market-quoted volatility factors.
Deferred compensation plan assets. The Company's deferred compensation plan assets represent investments in equity and mutual fund securities that are actively traded on major exchanges. These investments are measured based on observable prices on major exchanges. As of September 30, 2018 and December 31, 2017, the significant inputs to these asset exchange values represented Level 1 independent active exchange market price inputs.
Assets and liabilities measured at fair value on a nonrecurring basis. Certain assets and liabilities are measured at fair value on a nonrecurring basis. These assets and liabilities are not measured at fair value on an ongoing basis, but are subject to

13

Table of Contents
PIONEER NATURAL RESOURCES COMPANY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
September 30, 2018
(Unaudited)

fair value adjustments in certain circumstances. These assets and liabilities can include inventory, proved and unproved oil and gas properties and other long-lived assets that are written down to fair value when they are impaired or held for sale.
Proved oil and gas properties. As a result of the Company's proved property impairment assessments, the Company recognized a noncash impairment charge of $285 million to reduce the carrying value of the Raton Basin field during the three months ended March 31, 2017 to its estimated fair value of $186 million.
The Company calculated the fair value of the Raton Basin field as of March 31, 2017 using a discounted future cash flow model. Significant Level 3 assumptions associated with the calculation of the Raton Basin field's discounted future cash flows as of March 31, 2017 included management's longer-term commodity price outlook ("Management's Price Outlook") for oil of $53.65 per barrel ("Bbl") and gas of $3.00 per million British Thermal units ("MMBtu") and management's outlook for (i) production, (ii) capital expenditures, (iii) production costs and (iv) estimated proved reserves and risk-adjusted probable reserves. Management's Price Outlooks are developed based on third-party longer-term commodity futures price outlooks as of each measurement date. The expected future net cash flows were discounted using an annual rate of 10 percent to determine fair value.
It is reasonably possible that the Company's estimate of undiscounted future net cash flows attributable to other properties may change in the future resulting in the need to impair their carrying values. The primary factors that may affect estimates of future cash flows are (i) future adjustments, both positive and negative, to proved and risk-adjusted probable and possible oil and gas reserves, (ii) results of future drilling activities, (iii) Management's Price Outlooks and (iv) increases or decreases in production and capital costs associated with these reserves.
Sale of Raton Basin assets. In June 2018, the Company recognized an impairment charge of $77 million to reduce the carrying value of its Raton Basin field assets to the agreed upon sales price for these assets, as the assets were considered held for sale as of June 30, 2018. See Note 3 for additional information about the Company's sale of its Raton Basin field assets.
Financial instruments not carried at fair value. Carrying values and fair values of financial instruments that are not carried at fair value in the accompanying consolidated balance sheets as of September 30, 2018 and December 31, 2017 are as follows: 
 
September 30, 2018
 
December 31, 2017
 
Carrying
Value
 
Fair
Value
 
Carrying
Value
 
Fair
Value
 
(in millions)
Commercial paper, corporate bonds and time deposits
$
750

 
$
749

 
$
1,279

 
$
1,277

Current portion of long-term debt
$

 
$

 
$
449

 
$
457

Long-term debt
$
2,286

 
$
2,386

 
$
2,283

 
$
2,479

Commercial paper, corporate bonds and time deposits. Periodically, the Company invests in commercial paper and corporate bonds with investment grade rated entities. The Company also periodically enters into time deposits with financial institutions. The investments are carried at amortized cost and classified as held-to-maturity as the Company has the intent and ability to hold them until they mature. The carrying values of held-to-maturity investments are adjusted for amortization of premiums and accretion of discounts over the remaining life of the investment. Income related to these investments is recorded in interest and other income in the Company's consolidated statements of operations. The Company's investments in corporate bonds represent Level 1 inputs in the hierarchy, while other investments represent Level 2 inputs in the hierarchy. Commercial paper and time deposits are included in cash and cash equivalents if they have maturity dates that are less than 90 days at the date of purchase; otherwise, such investments are reflected in short-term investments or long-term investments in the accompanying consolidated balance sheets based on their maturity dates.

14

Table of Contents
PIONEER NATURAL RESOURCES COMPANY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
September 30, 2018
(Unaudited)

The following tables provide the components of the Company's cash and cash equivalents and investments as of September 30, 2018 and December 31, 2017:
 
September 30, 2018
Consolidated Balance Sheet Location
Cash
 
Commercial Paper
 
Corporate Bonds
 
Time
Deposits
 
Total
 
(in millions)
Cash and cash equivalents
$
869

 
$

 
$

 
$
50

 
$
919

Short-term investments

 
131

 
275

 
151

 
557

Long-term investments

 

 
193

 

 
193

 
$
869

 
$
131

 
$
468

 
$
201

 
$
1,669

 
December 31, 2017
Consolidated Balance Sheet Location
Cash
 
Commercial Paper
 
Corporate Bonds
 
Time
Deposits
 
Total
 
(in millions)
Cash and cash equivalents
$
846

 
$

 
$

 
$
50

 
$
896

Short-term investments

 
124

 
642

 
447

 
1,213

Long-term investments

 

 
66

 

 
66

 
$
846

 
$
124

 
$
708

 
$
497

 
$
2,175

Debt obligations. The Company's debt obligations are composed of its senior notes whose fair value is determined utilizing inputs that are Level 2 measurements in the fair value hierarchy. The Company's senior notes represent debt securities that are quoted but not actively traded on major exchanges; therefore, fair values of the Company's senior notes are based on their periodic values as quoted on the major exchanges.
The Company has other financial instruments consisting primarily of receivables, payables and other current assets and liabilities that approximate fair value due to the nature of the instrument and their relatively short maturities. Non-financial assets and liabilities initially measured at fair value include assets acquired and liabilities assumed in a business combination, goodwill and asset retirement obligations.
NOTE 5. Derivative Financial Instruments
The Company utilizes commodity swap contracts, collar contracts, collar contracts with short puts and basis swap contracts to (i) reduce the effect of price volatility on the commodities the Company produces and sells or consumes, (ii) support the Company's annual capital budgeting and expenditure plans and (iii) reduce commodity price risk associated with certain capital projects. The Company also, from time to time, utilizes interest rate contracts to reduce the effect of interest rate volatility on the Company's indebtedness.
Oil production derivative activities. The Company sells its oil production at the lease and the sales contracts governing such oil production are tied directly to, or are highly correlated with, New York Mercantile Exchange ("NYMEX") West Texas Intermediate ("WTI") oil prices. The Company also periodically enters into pipeline capacity commitments in order to secure available oil transportation capacity to the Gulf Coast. In order to diversify the oil price it receives, the Company (i) enters into oil purchase transactions with third parties in its areas of production that are tied to NYMEX WTI oil prices, (ii) transports the purchased oil using its pipeline capacity to the Gulf Coast, and (iii) enters into third party sale transactions to sell the oil into the Gulf Coast refinery or international export markets at prices that are highly correlated with Brent oil prices. As a result, the Company uses NYMEX WTI and Brent derivative contracts to manage oil price volatility and basis swap contracts to reduce basis risk between NYMEX and Brent prices and the actual index prices at which the oil is sold.

15

Table of Contents
PIONEER NATURAL RESOURCES COMPANY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
September 30, 2018
(Unaudited)

The following table sets forth the volumes per day associated with the Company's outstanding oil derivative contracts as of September 30, 2018 and the weighted average oil prices for those contracts:
 
2018
 
Year Ending December 31, 2019
 
Fourth Quarter
 
Brent swap contracts (a):
 
 
 
Volume (Bbl)

 
10,000

Price per Bbl

 
$
70.00

Brent collar contracts with short puts (b):
 
 
 
Volume (Bbl)

 
5,000

Price per Bbl:
 
 
 
Ceiling
$

 
$
87.00

Floor
$

 
$
75.00

Short put
$

 
$
65.00

 NYMEX collar contracts:
 
 
 
Volume (Bbl)
3,000

 

Price per Bbl:
 
 
 
Ceiling
$
58.05

 
$

Floor
$
45.00

 
$

NYMEX collar contracts with short puts:
 
 
 
Volume (Bbl)
159,000

 
55,000

Price per Bbl:
 
 
 
Ceiling
$
57.62

 
$
60.13

Floor
$
47.26

 
$
52.27

Short put
$
37.23

 
$
42.27

____________________
(a)
Subsequent to September 30, 2018, the Company liquidated its Brent swap contracts for cash payments of $5 million.
(b)
Subsequent to September 30, 2018, the Company entered into additional Brent collar contracts with short puts for 10,000 Bbls per day of 2019 production with a ceiling price of $91.36 per Bbl, a floor price of $75.00 per Bbl and a short put price of $65.00 per Bbl.
NGL production derivative activities. All material physical sales contracts governing the Company's NGL production are tied directly or indirectly to either Mont Belvieu, Texas or Conway, Kansas NGL component product prices. The Company uses derivative contracts to manage NGL component price volatility.
The following table sets forth the volumes per day associated with the Company's outstanding NGL derivative contracts as of September 30, 2018 and the weighted average NGL prices for those contracts: 
 
2018
 
Year Ending December 31, 2019
 
Fourth Quarter
 
Ethane basis swap contracts (a):
 
 
 
Volume (MMBtu)
6,920

 
6,920

Price differential ($/MMBtu)
$
1.60

 
$
1.60

____________________
(a)
The ethane basis swap contracts reduce the price volatility of ethane forecasted for sale by the Company at Mont Belvieu, Texas-posted prices. The ethane basis swap contracts fix the basis differential on a NYMEX Henry Hub ("HH") MMBtu equivalent basis. The Company will receive the HH price plus the price differential on 6,920 MMBtu per day, which is equivalent to 2,500 Bbls per day of ethane. Subsequent to September 30, 2018, the Company liquidated its ethane basis swap contracts for cash payments of $4 million.

16

Table of Contents
PIONEER NATURAL RESOURCES COMPANY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
September 30, 2018
(Unaudited)

Gas production derivative activities. All material physical sales contracts governing the Company's gas production are tied directly or indirectly to HH gas prices or regional index prices where the gas is sold. The Company uses derivative contracts to manage gas price volatility and basis swap contracts to reduce basis risk between HH prices and actual index prices at which the gas is sold.
The following table sets forth the volumes per day associated with the Company's outstanding gas derivative contracts as of September 30, 2018 and the weighted average gas prices for those contracts: 
 
2018
 
Year Ending December 31, 2019
 
Fourth Quarter
 
Swap contracts (a):
 
 
 
Volume (MMBtu)
101,348

 
647

Price per MMBtu
$
3.00

 
$
3.11

Collar contracts with short puts:
 
 
 
Volume (MMBtu)
50,000

 

Price per MMBtu:
 
 
 
Ceiling
$
3.40

 
$

Floor
$
2.75

 
$

Short put
$
2.25

 
$

Basis swap contracts:
 
 
 
Permian Basin index swap volume (MMBtu) (b)
58,652

 
44,230

Price differential ($/MMBtu)
$
(1.46
)
 
$
(1.46
)
Southern California index swap volume (MMBtu) (c)
66,522

 
84,932

Price differential ($/MMBtu)
$
0.50

 
$
0.33

____________________
(a)
Subsequent to September 30, 2018, the Company entered into additional swap contracts for 50,000 MMBtu per day of January through March 2019 production with an average fixed price of $3.24 per MMBtu.
(b)
The referenced basis swap contracts fix the basis differentials between the index price at which the Company sells its Permian Basin gas and the HH price used in swap contracts and collar contracts with short puts.
(c)
The referenced basis swap contracts fix the basis differentials between Permian Basin index prices and southern California index prices for Permian Basin gas forecasted for sale in Arizona and southern California.

Other derivatives. Periodically, the Company enters into gas swap contracts to mitigate gas price risk. As of September 30, 2018, the Company was party to November 2018 through March 2019 gas swap contracts for 4,500 MMBtu per day at an average fixed price of $1.58 per MMBtu. The Company will receive Permian Basin index prices in exchange for paying the fixed price.
Tabular disclosure of derivative financial instruments. All of the Company's derivatives are accounted for as non-hedge derivatives as of September 30, 2018 and December 31, 2017, and therefore all changes in the fair values of its derivative contracts are recognized as gains or losses in the earnings of the periods in which they occur. The Company classifies the fair value amounts of derivative assets and liabilities as net current or noncurrent derivative assets or net current or noncurrent derivative liabilities, whichever the case may be, by commodity and counterparty. The Company enters into derivatives under master netting arrangements, which, in an event of default, allows the Company to offset payables to and receivables from the defaulting counterparty.

17

Table of Contents
PIONEER NATURAL RESOURCES COMPANY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
September 30, 2018
(Unaudited)

The aggregate fair value of the Company's derivative instruments reported in the accompanying consolidated balance sheets by type and counterparty, including the classification between current and noncurrent assets and liabilities, consists of the following:
Fair Value of Derivative Instruments as of September 30, 2018
Type
 
Consolidated
Balance Sheet
Location
 
Fair
Value
 
Gross Amounts
Offset in the
Consolidated
Balance Sheet
 
Net Fair Value
Presented in the
Consolidated
Balance Sheet
 
 
 
 
(in millions)
Derivatives not designated as hedging instruments
 
 
 
 
 
 
Asset Derivatives:
 
 
 
 
 
 
Commodity price derivatives
 
Derivatives - current
 
$
7

 
$
(6
)
 
$
1

Commodity price derivatives
 
Derivatives - noncurrent
 
$
1

 
$
(1
)
 

 
 
 
 
 
 
 
 
$
1

Liability Derivatives:
 

 
 
 
 
Commodity price derivatives
 
Derivatives - current
 
$
488

 
$
(6
)
 
$
482

Commodity price derivatives
 
Derivatives - noncurrent
 
$
71

 
$
(1
)
 
70

 
 
 
 
 
 
 
 
$
552

Fair Value of Derivative Instruments as of December 31, 2017
Type
 
Consolidated
Balance Sheet
Location
 
Fair
Value
 
Gross Amounts
Offset in the
Consolidated
Balance Sheet
 
Net Fair Value
Presented in the
Consolidated
Balance Sheet
 
 
 
 
(in millions)
Derivatives not designated as hedging instruments
 
 
 
 
 
 
Asset Derivatives:
 
 
 
 
 
 
Commodity price derivatives
 
Derivatives - current
 
$
13

 
$
(2
)
 
$
11

Commodity price derivatives
 
Derivatives - noncurrent
 
$
3

 
$
(3
)
 

 
 
 
 
 
 
 
 
$
11

Liability Derivatives:
 
 
 
 
 
 
Commodity price derivatives
 
Derivatives - current
 
$
234

 
$
(2
)
 
$
232

Commodity price derivatives
 
Derivatives - noncurrent
 
$
26

 
$
(3
)
 
23

 
 
 
 
 
 
 
 
$
255

The following table details the location of gains and losses recognized on the Company's derivative contracts in the accompanying consolidated statements of operations:
Derivatives Not Designated as Hedging Instruments
 
Location of Gain/(Loss) Recognized in Earnings on Derivatives
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
 
 
2018
 
2017
 
2018
 
2017
 
 
 
 
(in millions)
Commodity price derivatives
 
Derivative gains (losses), net
 
$
(135
)
 
$
(133
)
 
$
(701
)
 
$
154

Interest rate derivatives
 
Derivative gains (losses), net
 

 

 

 
(1
)
Total
 
$
(135
)
 
$
(133
)
 
$
(701
)
 
$
153


Derivative Counterparties. The Company uses credit and other financial criteria to evaluate the credit standing of, and to select, counterparties to its derivative instruments. Although the Company does not obtain collateral or otherwise secure the fair value of its derivative instruments, associated credit risk is mitigated by the Company's credit risk policies and procedures.

18

Table of Contents
PIONEER NATURAL RESOURCES COMPANY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
September 30, 2018
(Unaudited)

NOTE 6. Exploratory Costs
The Company capitalizes exploratory well and project costs until a determination is made that the well or project has either found proved reserves, is impaired or is sold. The Company's capitalized exploratory well and project costs are presented in proved properties in the accompanying consolidated balance sheets. If the exploratory well or project is determined to be impaired, the impaired costs are charged to exploration and abandonments expense.
The following table reflects the Company's capitalized exploratory well and project activity during the three and nine months ended September 30, 2018:
 
Three Months Ended September 30, 2018
 
Nine Months Ended September 30, 2018
 
(in millions)
Beginning capitalized exploratory well costs
$
575

 
$
505

Additions to exploratory well costs pending the determination of proved reserves
607

 
1,820

Reclassification due to determination of proved reserves
(554
)
 
(1,689
)
Disposition of assets
(1
)
 
(1
)
Exploratory well costs charged to exploration and abandonment expense
(1
)
 
(9
)
Ending capitalized exploratory well costs
$
626

 
$
626

The following table provides an aging as of September 30, 2018 and December 31, 2017 of capitalized exploratory costs and the number of projects for which exploratory well costs have been capitalized for a period greater than one year, based on the date drilling was completed:
 
September 30, 2018
 
December 31, 2017
 
(in millions, except well counts)
Capitalized exploratory well costs that have been suspended:
 
 
 
One year or less
$
614

 
$
493

More than one year
12

 
12

 
$
626

 
$
505

Number of wells or projects with exploratory well costs that have been suspended for a period greater than one year
7

 
7

All projects with exploratory well costs that have been suspended for a period greater than one year as of September 30, 2018 are in the Eagle Ford Shale area. The Company is evaluating both the well performance of similar wells completed in 2017 and whether to drill additional wells near these wells in order for all of the wells in the area to be fracture stimulated as a package, thereby improving the resource recovery for the area. The Company expects to complete its evaluation of these wells during 2018.
NOTE 7. Long-term Debt
Credit facility. The Company's long-term debt consists of senior notes, a revolving corporate credit facility (the "Credit Facility") and the effects of issuance costs and discounts. The Credit Facility is maintained with a syndicate of financial institutions and has aggregate loan commitments of $1.5 billion. The Credit Facility had an original maturity date of August 2020, but in October 2018, the maturity date was extended to October 2023 (see Note 16 for additional information regarding the Credit Facility extension). As of September 30, 2018, the Company had no outstanding borrowings under the Credit Facility and was in compliance with its debt covenants.
Senior notes. The Company's 6.875% senior notes (the "6.875% Senior Notes") and 6.65% senior notes (the "6.65% Senior Notes"), with debt principal balances of $450 million and $485 million, respectively, matured and were repaid in May 2018 and March 2017, respectively. The Company funded the repayments with cash on hand. The 6.875% Senior Notes were classified as current in the accompanying consolidated balance sheet at December 31, 2017.

19

Table of Contents
PIONEER NATURAL RESOURCES COMPANY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
September 30, 2018
(Unaudited)

NOTE 8. Incentive Plans
Stock-based compensation. For the three and nine months ended September 30, 2018, the Company recorded $27 million and $79 million, respectively, of stock-based compensation expense for all plans, as compared to $21 million and $78 million for the same respective periods in 2017. As of September 30, 2018, there was $111 million of unrecognized stock-based compensation expense related to unvested share-based compensation plans, including $24 million attributable to stock-based awards that are expected to be settled on their vesting date in cash, rather than in equity shares ("Liability Awards"). The unrecognized compensation expense will be recognized on a straight-line basis over the remaining vesting periods of the awards, which is a period of less than three years on a weighted average basis. As of September 30, 2018 and December 31, 2017, accounts payable – due to affiliates included $13 million and $20 million, respectively, of liabilities attributable to Liability Awards.
The following table summarizes the activity that occurred during the nine months ended September 30, 2018 for restricted stock awards and performance units issued by the Company:
 
Restricted
Stock Equity
Awards
 
Restricted
Stock Liability
Awards
 
Performance
Units
Outstanding as of December 31, 2017
916,223

 
252,735

 
163,158

Awards granted
390,618

 
113,231

 
62,541

Awards forfeited
(45,877
)
 
(19,164
)
 
(1,285
)
Awards vested
(426,541
)
 
(131,496
)
 
(34,778
)
Outstanding as of September 30, 2018
834,423

 
215,306

 
189,636


As of September 30, 2018 and December 31, 2017, the Company also had 131,630 and 138,493, respectively, of stock options outstanding and exercisable. There were 6,863 stock options exercised during the nine months ended September 30, 2018.
NOTE 9. Asset Retirement Obligations
The Company's asset retirement obligations primarily relate to the future plugging and abandonment of wells and related facilities. The following table summarizes the Company's asset retirement obligation activity during the three and nine months ended September 30, 2018 and 2017: 
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
 
2018
 
2017
 
2018
 
2017
 
(in millions)
Beginning asset retirement obligations
$
185

 
$
294

 
$
271

 
$
297

New wells placed on production
1

 

 
2

 
2

Changes in estimates

 

 
2

 
7

Dispositions
(10
)
 

 
(89
)
 
(7
)
Liabilities settled
(5
)
 
(7
)
 
(23
)
 
(21
)
Accretion of discount
3

 
5

 
11

 
14

Ending asset retirement obligations
$
174

 
$
292

 
$
174

 
$
292

The Company records the current and noncurrent portions of asset retirement obligations in other current liabilities and other liabilities, respectively, in the accompanying consolidated balance sheets. As of September 30, 2018 and December 31, 2017, the current portion of the Company's asset retirement obligations was $28 million and $41 million, respectively.
NOTE 10. Commitments and Contingencies
Legal actions. The Company is a party to various proceedings and claims incidental to its business. While many of these matters involve inherent uncertainty, the Company believes that the amount of the liability, if any, ultimately incurred with respect to such proceedings and claims will not have a material adverse effect on the Company's financial position as a whole or on its liquidity, capital resources or future annual results of operations. The Company records reserves for contingencies when information available indicates that a loss is probable and the amount of the loss can be reasonably estimated.

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PIONEER NATURAL RESOURCES COMPANY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
September 30, 2018
(Unaudited)

Obligations following divestitures. In connection with its divestiture transactions, the Company may retain certain liabilities, provide the purchaser certain indemnifications and provide credit support or guarantees for obligations that are transferred, subject to defined limitations, which may apply to identified pre-closing matters, including matters of litigation, environmental contingencies, royalty and transportation obligations and income taxes. The Company does not believe these obligations are probable of having a material impact on its liquidity, financial position or future results of operations.
Texas Commission on Environmental Quality ("TCEQ") enforcement action. The Company has been advised by the TCEQ that the agency is pursuing an enforcement action against the Company and may seek monetary sanctions due to various emissions occurring during the Company's ownership of the recently sold Fain gas plant in the West Panhandle region of Texas. The Company has engaged in discussions with the TCEQ regarding these matters. Although the Company cannot predict the outcome of these discussions with any certainty, the Company believes such monetary sanctions will not exceed $525,000 in the aggregate.
Lease agreements. In June 2017, the Company entered into a 20-year operating lease for the Company's new corporate headquarters that is currently being constructed in Irving, Texas. Annual base rent is expected to be $33 million and lease payments are expected to commence once the building is complete, which is anticipated to occur during the second half of 2019. The Company has a variable equity interest in the entity that is constructing the building. The Company is not the primary beneficiary of the variable interest entity and only has a profit sharing interest after certain economic returns are achieved. The Company has no exposure to the variable interest entity's losses or future liabilities, if any. The Company is the deemed owner of the building (for accounting purposes) during the construction period and is following the build-to-suit accounting guidance. Accordingly, as of September 30, 2018, the Company has capitalized $170 million of construction costs, including capitalized interest, within other property and equipment and has recognized a corresponding build-to-suit lease liability. The recording of these assets and liabilities are considered noncash investing and financing items, respectively, for purposes of the consolidated statements of cash flows.
Firm purchase, gathering, processing, transportation, and fractionation commitments. The Company from time to time enters into, and as of September 30, 2018 was a party to, take-or-pay agreements, which include contractual commitments to purchase and process sand and purchase water for use in the Company's drilling operations and contractual commitments with midstream service companies and pipeline carriers for future gathering, processing, transportation, storage and fractionation. These commitments are normal and customary for the Company's business activities.
NOTE 11. Revenue Recognition
Impact of ASC 606 adoption. On January 1, 2018, the Company adopted ASC 606 by applying the modified retrospective method to all revenue contracts as of January 1, 2018. Results for reporting periods beginning after January 1, 2018 are presented under ASC 606, while prior period amounts are not adjusted and continue to be reported in accordance with historic accounting under ASC 605. The Company completed a detailed review of its revenue contracts, which represent all of the Company's revenue streams including oil, NGL and gas sales and sales of purchased oil and gas, to determine the effect of the new standard for the three and nine months ended September 30, 2018. The Company did not record a change to its opening retained earnings as of January 1, 2018 as there was no material change to the timing or pattern of revenue recognition due to the adoption of ASC 606.
The adoption of ASC 606 as of January 1, 2018 had the following impact on the Company's results of operations for the three and nine months ended September 30, 2018:
 
Three Months Ended September 30, 2018
 
Nine Months Ended September 30, 2018
 
As Reported
 
ASC 605
(Without Adoption of ASC 606)
 
Effect of Change
Higher (Lower)
 
As Reported
 
ASC 605
(Without Adoption of ASC 606)
 
Effect of Change
Higher (Lower)
 
(in millions)
 
(in millions)
Revenues and other income:
 
 
 
 
 
 
 
 
 
 
 
Oil and gas
$
1,317

 
$
1,258

 
$
59

 
$
3,869

 
$
3,713

 
$
156

Costs and expenses:
 
 
 
 
 
 
 
 
 
 
 
Oil and gas production
$
198

 
$
139

 
$
59

 
$
654

 
$
498

 
$
156


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PIONEER NATURAL RESOURCES COMPANY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
September 30, 2018
(Unaudited)

Changes in oil and gas revenues and oil and gas production costs (specifically gathering, processing and transportation costs) are due to the conclusion under the control model in ASC 606 that the third-party processor or transporter is only providing gas processing or transportation services and that the Company remains the principal owner of the commodity until sold to the ultimate purchaser. This is a change from ASC 605 where the Company historically recorded gas processing fees as a reduction of revenue recognized by the Company, as these fees were considered necessary to separate the wet gas stream into its sellable components (i.e., dry gas and individual NGL components). Under ASC 605, third-party processing and transportation companies were determined to have control of the commodities being processed and transported. As a result of adopting ASC 606, the Company has modified its presentation of revenues and expenses for these arrangements. Revenues related to these agreements are now presented on a gross basis for amounts expected to be received from third-party purchasers through the marketing process. Gathering, processing and transportation expenses related to these agreements, incurred prior to the transfer of control to the purchaser, are now presented as oil and gas production costs.
Disaggregated revenue from contracts with purchasers. Revenues on sales of oil, NGLs, gas and purchased oil and gas are recognized when control of the product is transferred to the purchaser and payment can be reasonably assured. Sales prices for oil, NGL and gas production are negotiated based on factors normally considered in the industry, such as an index or spot price, distance from the well to the pipeline or market, commodity quality and prevailing supply and demand conditions. As such, the prices of oil, NGLs and gas generally fluctuate based on the relevant market index rates. The following table provides information about disaggregated revenue from contracts with purchasers by product type:
 
Three Months Ended September 30, 2018
Nine Months Ended September 30, 2018
 
(in millions)
Oil sales
$
1,033

 
$
3,079

NGL sales
207

 
542

Gas sales
77

 
248

Total oil and gas sales
1,317

 
3,869

Sales of purchased oil
1,127

 
3,261

Sales of purchased gas
14

 
45

Total sales of purchased oil and gas
1,141

 
3,306

Total revenue derived from contracts with purchasers
$
2,458

 
$
7,175

Oil sales. Sales under the Company's oil contracts are generally considered performed when the Company sells oil production at the wellhead and receives an agreed-upon index price, net of any price differentials. The Company recognizes revenue when control transfers to the purchaser at the wellhead based on the net price received.
NGL and gas sales. The Company evaluated whether it was the principal or the agent in natural gas processing transactions and concluded that it is the principal when it has the ability to take-in-kind, which is the case in the majority of the Company's gas processing and transportation contracts. Therefore, beginning January 1, 2018, the Company began recognizing revenue on a gross basis, with the gathering, processing and transportation costs associated with its take-in-kind arrangements being recognized as oil and gas production costs in the Company's accompanying consolidated statement of operations. Gas and NGL processing fees previously reflected as a reduction in the Company's reported gas and NGL revenue are now recognized as an expense in the Company's production costs.
Sales of purchased oil and gas. The Company periodically enters into pipeline capacity commitments in order to secure available oil, NGL and gas transportation capacity from the Company's areas of production. The Company enters into purchase transactions with third parties and separate sale transactions with third parties to diversify a portion of the Company's WTI oil sales to the Gulf Coast refinery or international export markets and to satisfy unused pipeline capacity commitments. Revenues and expenses from these transactions are presented on a gross basis as the Company acts as a principal in the transaction by assuming control of the commodities purchased and the responsibility to deliver the commodities sold. Revenue is recognized when control transfers to the purchaser at the delivery point based on the price received from the purchaser. The transportation costs associated with these transactions are presented as a component of purchased oil and gas expense. Firm transportation payments on excess pipeline capacity are included in other expense in the accompanying consolidated statements of operations.

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PIONEER NATURAL RESOURCES COMPANY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
September 30, 2018
(Unaudited)

Performance obligations and contract balances. The majority of the Company's product sale commitments are short-term in nature with a contract term of one year or less. The Company typically satisfies its performance obligations upon transfer of control as described above in Disaggregated revenue from contracts with purchasers and records the related revenue in the month production is delivered to the purchaser. Settlement statements for sales of oil, NGLs and gas and sales of purchased oil and gas may not be received for 30 to 60 days after the date the volumes are delivered, and as a result, the Company is required to estimate the amount of volumes delivered to the purchaser and the price that will be received for the sale of the product. The Company records the differences between estimates and the actual amounts received for product sales in the month that payment is received from the purchaser. The implementation of ASC 606 has not changed existing controls around revenue estimates and the accrual process. Historically, differences between the Company's revenue estimates and actual revenue received have not been significant. As of September 30, 2018 and December 31, 2017, the accounts receivable balance representing amounts due or billable under the terms of contracts with purchasers was $806 million and $594 million, respectively.
NOTE 12. Interest and Other Income
The following table provides the components of the Company's interest and other income for the three and nine months ended September 30, 2018 and 2017:
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
 
2018
 
2017
 
2018
 
2017
 
(in millions)
Interest income
$
7

 
$
9

 
$
21

 
$
25

Deferred compensation plan income
3

 
1

 
6

 
3

Other income

 
2

 
7

 
3

Seismic data sales

 

 
5

 

Production and sales tax refunds

 
5

 
1

 
13

Total interest and other income
$
10

 
$
17

 
$
40

 
$
44


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PIONEER NATURAL RESOURCES COMPANY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
September 30, 2018
(Unaudited)

 NOTE 13. Other Expense
The following table provides the components of the Company's other expense for the three and nine months ended September 30, 2018 and 2017:
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
 
2018
 
2017
 
2018
 
2017
 
(in millions)
Transportation commitment charges (a)
$
43

 
$
45

 
$
121

 
$
127

Legal and environmental charges
6

 
2

 
18

 
9

Loss (income) from vertical integration services (b)
(5
)
 

 
5

 
11

Asset divestiture related charges (c)
123

 

 
132

 

Other
15

 
11

 
40

 
29

Total other expense
$
182

 
$
58

 
$
316

 
$
176

 ____________________
(a)
Primarily represents firm transportation payments on excess pipeline capacity commitments.
(b)
Loss (income) from vertical integration services primarily represents net margins (attributable to third party working interest owners) that result from Company-provided fracture stimulation and well service operations, which are ancillary to and supportive of the Company's oil and gas joint operating activities, and do not represent intercompany transactions. For the three and nine months ended September 30, 2018, these vertical integration net margins included $49 million and $113 million, respectively, of revenues and $44 million and $118 million, respectively, of costs and expenses. For the same respective periods in 2017, these vertical integration net margins included $42 million and $84 million of revenues and $42 million and $95 million of costs and expenses.
(c)
Primarily represents severance and firm transportation commitments associated with the Company's divestiture of its properties in the Raton and West Panhandle fields. See Note 3 for additional information on these charges.
NOTE 14. Income Taxes
The Company's income tax benefit (provision) consisted of the following for the three and nine months ended September 30, 2018 and 2017:
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
 
2018
 
2017
 
2018
 
2017
 
(in millions)
Current tax provision
$
(2
)
 
$

 
$
(2
)
 
$

Deferred tax benefit (provision)
(116
)
 
11

 
(186
)
 
(79
)
Income tax benefit (provision)
$
(118
)
 
$
11

 
$
(188
)
 
$
(79
)
For both the three and nine months ended September 30, 2018, the Company's effective tax rate, excluding net loss attributable to noncontrolling interests, was 22 percent, as compared to an effective rate of 34 percent and 32 percent for the same respective periods in 2017. The U.S. statutory rate for the three and nine months ended September 30, 2018 was 21 percent, reflecting the reduction in the federal corporate income tax rate from 35 percent to 21 percent beginning in 2018 as a result of the Tax Cuts and Jobs Act that was enacted in December 2017. The Company's effective tax rate for the nine months ended September 30, 2017 differs from the U.S. statutory rate in effect during 2017 of 35 percent primarily due to recognizing excess tax benefits of $8 million associated with the adoption of ASU 2016-09, "Improvements to Employee Share-Based Payment Accounting," which requires excess tax benefits or deficiencies associated with the vesting of long-term incentive awards to be recorded as income tax expense or benefit in the statement of operations rather than as an adjustment to additional paid-in capital in the balance sheet.
The Company recognizes the tax benefit from an uncertain tax position only if it is more likely than not that the tax position will be sustained upon examination by the taxing authorities based upon the technical merits of the position. As of September 30, 2018 and December 31, 2017, the Company had cumulative unrecognized tax benefits of $135 million and $124 million, respectively, resulting from research and experimental expenditures related to horizontal drilling and completions innovations. If

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PIONEER NATURAL RESOURCES COMPANY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
September 30, 2018
(Unaudited)

all or a portion of the unrecognized tax benefit is sustained upon examination by the taxing authorities, the tax benefit will be recognized as a reduction to the Company's deferred tax liability and will affect the Company's effective tax rate in the period it is recognized. The timing as to when the Company will substantially resolve the uncertainties associated with the unrecognized tax benefit is uncertain.
The Company files income tax returns in the U.S. federal and various state and foreign jurisdictions. The Internal Revenue Service has closed examinations of the 2012 and prior tax years and, with few exceptions, the Company believes that it is no longer subject to examinations by state and foreign tax authorities for years before 2012. As of September 30, 2018, no adjustments had been proposed in any jurisdiction that would have a significant effect on the Company's liquidity, future results of operations or financial position.
NOTE 15. Net Income (Loss) Per Share
The following table reconciles the Company's net income (loss) attributable to common stockholders to basic and diluted net income (loss) attributable to common stockholders for the three and nine months ended September 30, 2018 and 2017:
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
 
2018
 
2017
 
2018
 
2017
 
(in millions)
Net income (loss) attributable to common stockholders
$
411

 
$
(23
)
 
$
655

 
$
168

Participating share-based earnings
(2
)
 

 
(3
)
 
(1
)
Basic and diluted net income (loss) attributable to common stockholders
$
409

 
$
(23
)
 
$
652

 
$
167

Basic and diluted weighted average common shares outstanding were 171 million for both the three and nine months ended September 30, 2018 and 170 million for both the three and nine months ended September 30, 2017.
Stock repurchase program. In February 2018, the Company's board of directors (the "Board") approved a $100 million common stock repurchase program to offset the impact of dilution associated with annual employee stock awards, of which $78 million remained available for use to purchase shares as of September 30, 2018. During the nine months ended September 30, 2018, the Company purchased $22 million of common stock pursuant to the program.
NOTE 16. Subsequent Events
In October 2018, the Company entered into a purchase and sale agreement to sell approximately 2,900 net acres in the Sinor Nest (Lower Wilcox) field in South Texas to an unaffiliated third party for cash proceeds of $132 million, before normal closing adjustments. The sale of these assets is expected to result in a pretax gain of $45 million to $65 million. The transaction is expected to close during the fourth quarter, subject to the satisfaction of customary closing conditions.
In October 2018, the Company entered into a Credit Agreement with a syndicate of financial institutions, primarily to extend the maturity of the Credit Facility from August 2020 to October 2023, while maintaining aggregate loan commitments of $1.5 billion. The Company accounted for the entry into the Credit Agreement as a modification of the prior agreement and capitalized the debt issuance costs along with those unamortized issuance costs that remained from the issuance of the prior agreement. As of September 30, 2018, the Company had no outstanding borrowings under the Credit Facility.

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PIONEER NATURAL RESOURCES COMPANY

Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations
Financial and Operating Performance
The Company's financial and operating performance for the three months ended September 30, 2018 included the following highlights:
Net income attributable to common stockholders for the three months ended September 30, 2018 was $411 million ($2.39 per diluted share), as compared to net loss of $23 million ($0.13 per diluted share) for the same period in 2017. The primary components of the increase in net income attributable to common stockholders include:
a $462 million increase in oil and gas revenues as a result of a 16 percent increase in sales volumes and a 32 percent increase in average realized commodity prices per BOE (the increase in oil and gas revenues is inclusive of the effect of the adoption of ASC 606 as described below in Adoption of New Accounting Standards);
a $214 million increase in net sales of purchased oil and gas, primarily due to favorable downstream oil margins on the Company's Gulf Coast refinery and export sales;
a $143 million increase in net gains on disposition of assets, primarily due to recognition of a gain of $146 million on the sale of the Company's West Panhandle field assets during the third quarter of 2018; and
a $7 million decrease in interest expense, primarily due to the repayment of the Company's 6.875% senior notes (the "6.875% Senior Notes"), which matured in May 2018, and the Company's 6.65% senior notes (the "6.65% Senior Notes"), which matured in March 2017; partially offset by
a $129 million increase in the Company's income tax provision as a result of the improvements in earnings during the three months ended September 30, 2018, as compared to the same period in 2017;
a $124 million increase in other expense, primarily due to asset divestiture related charges of $123 million during the third quarter of 2018;
a $76 million increase in total oil and gas production costs and production and ad valorem taxes, primarily due to the aforementioned increase in sales volumes and average realized commodity prices per BOE (the increase in production costs is also inclusive of the effect of the adoption of ASC 606 as described below in Adoption of New Accounting Standards);
a $39 million increase in DD&A expense, primarily due the aforementioned increase in sales volumes;
a $15 million increase in general and administrative expense, primarily due to an increase in compensation costs, including benefits expense, as a result of an increase in headcount due to the Company's continued growth; and
a $7 million decrease in interest and other income, primarily due to a decrease in production and sales tax refunds.
During the three months ended September 30, 2018, average daily sales volumes increased by 16 percent to 320,659 BOEPD, as compared to 275,711 BOEPD during the same period in 2017. The increase in average daily sales volumes for the three months ended September 30, 2018, as compared to the same period in 2017, is primarily due to the Company's successful Spraberry/Wolfcamp horizontal drilling program, partially offset by the loss of sales volumes as a result of the sale of the Company's Raton and West Panhandle assets in July 2018 and August 2018, respectively.
Average oil and NGL prices increased during the three months ended September 30, 2018 to $57.54 per Bbl and $35.97 per Bbl, respectively, as compared to $45.35 per Bbl and $18.96 per Bbl, respectively, for the same period in 2017. Average gas prices decreased during the three months ended September 30, 2018 to $2.21 per Mcf, as compared to $2.58 per Mcf for the same period in 2017. Current year pricing is inclusive of the effect of the adoption of ASC 606 as described below in Adoption of New Accounting Standards.
Net cash provided by operating activities increased to $874 million for the three months ended September 30, 2018, as compared to $456 million for the same period in 2017. The $418 million increase in net cash provided by operating activities for the three months ended September 30, 2018, as compared to the same period in 2017, is primarily due to increases in (i) oil and gas revenues as a result of increases in commodity prices and sales volumes and (ii) net sales of purchased oil and gas, primarily due to favorable downstream oil margins on the Company's Gulf Coast refinery and export sales; partially offset by increases in oil and gas production costs, production and ad valorem taxes and cash derivative payments.
As of September 30, 2018 and December 31, 2017, the Company's net debt to book capitalization was five percent.


26

PIONEER NATURAL RESOURCES COMPANY

Adoption of New Accounting Standard
On January 1, 2018, the Company adopted Financial Accounting Standards Board ("FASB") Accounting Standards Update ("ASU") No. 2014-09 (ASC 606) "Revenue from Contracts with Customers." ASC 606 requires entities to recognize revenue when control of the promised goods or services is transferred to customers at an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. As a result of adopting ASC 606, the Company has modified its presentation of revenues and expenses for certain processing and transportation contracts that were previously netted in oil and gas revenues. Results for reporting periods beginning after January 1, 2018 are presented under ASC 606, while prior period amounts are not adjusted and continue to be reported in accordance with historical accounting under ASC 605.
Changes in oil and gas revenues, gas production volumes and oil and gas production costs (specifically gathering, processing and transportation costs) are due to the conclusion under the control model in ASC 606 that the third-party processor or transporter is only providing gas processing or transportation services and the Company remains the principal owner of the commodity until sold to the ultimate purchaser. This is a change from ASC 605 where the Company historically recorded gas processing fees, including gas volumes that were used to satisfy certain costs, as a reduction of revenue and gas production volumes recognized by the Company, as these fees and volumes were considered necessary to separate the wet gas stream into its sellable components (i.e. dry gas and individual NGL components). Under ASC 605, third-party processing and transportation companies were determined to have control of the commodities being processed and transported. As a result, the Company has modified its presentation of revenues, production and expenses for these arrangements. Sales to third-party purchasers are now presented on a gross basis and gathering, processing, transportation and other expenses related to these agreements, incurred prior to the transfer of control to the purchaser, are now presented as oil and gas production costs.
The adoption of ASC 606 as of January 1, 2018 had the following impact on the Company's results of operations for the three months ended September 30, 2018:
 
As Reported
 
ASC 605
(Without Adoption
of ASC 606)
 
Effect of Change
 
(in millions)
Oil and Gas Sales:
 
 
 
 
 
Oil sales
$
1,033

 
$
1,033

 
$

NGL sales
207

 
162

 
45

Gas sales
77

 
63

 
14

Oil and gas sales
$
1,317

 
$
1,258

 
$
59

 
 
 
 
 
 
Production Costs
$
198

 
$
139

 
$
59

See Notes 2 and 11 of Notes to Consolidated Financial Statements in "Item 1. Financial Statements" for additional information regarding the Company's adoption of ASC 606.
 Fourth Quarter 2018 Outlook
In February 2018, the Company announced its intention to divest its properties in the South Texas, Raton and West Panhandle fields and focus its efforts and capital resources on its Permian Basin assets. The Raton and West Panhandle divestitures closed in July 2018 and August 2018, respectively, and the Sinor Nest sale in South Texas is expected to close during the fourth quarter of 2018. As a result, the results of operations associated with the Raton Basin and West Panhandle assets will not be included in the Company's reported fourth quarter results and the results of operations associated with the Sinor Nest assets will only be included for a portion of the quarter. The remaining planned divestiture of the Company's South Texas assets is expected to occur before the end of 2018.
Based on the Company's ongoing divestiture process, it is only providing Permian Basin specific estimates for production, production costs and DD&A expense for the quarter ending December 31, 2018. All other operating and financial results for the quarter ended December 31, 2018 provided below reflect the expected results of the total Company.
Permian Basin production is forecasted to average between 293 MBOEPD to 303 MBOEPD. Permian Basin production costs (including production and ad valorem taxes and transportation costs) are expected to average $9.00 to $11.00 per BOE,

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PIONEER NATURAL RESOURCES COMPANY

reflecting current NYMEX strip commodity prices. Permian Basin DD&A expense, including the Company's other property and equipment, is expected to average $13.00 to $15.00 per BOE.
Total exploration and abandonment expense is expected to be $20 million to $30 million. General and administrative expense is expected to be $95 million to $100 million. Interest expense is expected to be $30 million to $35 million, and other expense is expected to be $50 million to $60 million, including $40 million to $45 million of charges associated with excess firm gathering and transportation commitments (primarily related to Eagle Ford operations). Accretion of discount on asset retirement obligations is expected to be $3 million to $6 million.
The Company's effective income tax rate is expected to range from 21 percent to 25 percent. Current income taxes are expected to be less than $5 million.
Operations and Drilling Highlights
The following table summarizes the Company's average daily oil, NGL, gas and total production by asset area during the nine months ended September 30, 2018:
 
Oil (Bbls)
 
NGLs (Bbls)
 
Gas (Mcf)
 
Total (BOE)
Permian Basin
177,188

 
53,665

 
273,197

 
276,386

South Texas - Eagle Ford Shale (a)
7,096

 
6,577

 
39,386

 
20,238

Raton Basin (b)
1

 

 
63,788

 
10,632

West Panhandle (c)
1,344

 
3,583

 
12,920

 
7,080

South Texas - Other (a)
2,115

 
582

 
18,315

 
5,750

Other
12

 
3

 
11

 
16

Total
187,756

 
64,410

 
407,617

 
320,102

____________________
(a)
Includes average daily oil, NGL and gas volumes from January through April 2018 of 510 Bbls of oil, 154 Bbls of NGLs and 1,530 Mcf of gas (total of 920 BOEPD) associated with the acreage and assets in the western portion of the Eagle Ford Shale that were sold in April 2018.
(b)
Represents average daily oil, NGL and gas volumes from January through July 2018 associated with the acreage and assets of the Raton Basin that were sold in July 2018.
(c)
Represents average daily oil, NGL and gas volumes from January through August 2018 associated with the acreage and assets of the West Panhandle field that were sold in August 2018.
See Note 3 of Notes to the Consolidated Financial Statements included in "Item 1. Financial Statements" for additional information about the 2018 divestitures.
The Company's liquids production increased to 79 percent of total production on a BOE basis for the nine months ended September 30, 2018, as compared to 78 percent for the same period last year.
 The following table summarizes by geographic area the Company's finding and development costs incurred during the nine months ended September 30, 2018: 
 
Acquisition Costs
 
Exploration
Costs
 
Development
Costs
 
Asset
Retirement Obligations
 
Total
 
Proved
 
Unproved
 
 
 
 
 
(in millions)
Permian Basin
$
1

 
$
41

 
$
1,873

 
$
645

 
$
1

 
$
2,561

South Texas - Eagle Ford Shale

 

 
2

 
15

 

 
17

Raton Basin

 

 

 
1

 

 
1

West Panhandle

 

 
3

 
2

 

 
5

Other

 

 
1

 

 

 
1

Total
$
1

 
$
41

 
$
1,879

 
$
663

 
$
1

 
$
2,585


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PIONEER NATURAL RESOURCES COMPANY

The following table summarizes the Company's development and exploration/extension drilling activities for the nine months ended September 30, 2018: 
 
Development Drilling
 
Beginning Wells
in Progress
 
Wells
Spud
 
Successful
Wells
 
Unsuccessful
Wells
 
Ending Wells
in Progress
Permian Basin
14

 
21

 
20

 
1

 
14

 
 
Exploration/Extension Drilling
 
Beginning Wells
in Progress
 
Wells
Spud
 
Successful
Wells
 
Unsuccessful
Wells
 
Wells
Sold
 
Ending Wells
in Progress
Permian Basin
125

 
203

 
182

 
1

 

 
145

South Texas - Eagle Ford Shale
8