FIRST AMENDMENT TO CREDIT AGREEMENT dated as of November 14, 2014 among ANADARKO PETROLEUM CORPORATION, JPMORGAN CHASE BANK, N.A., as Administrative Agent, and The Lenders Party Hereto

BORROWER:

ANADARKO PETROLEUM CORPORATION,

as Borrower

/s/ ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇

▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇

Senior Vice President, Finance and Treasurer

Exhibit 10.1

Execution Version

FIRST AMENDMENT TO CREDIT AGREEMENT

dated as of

November 14, 2014

among

ANADARKO PETROLEUM CORPORATION,

JPMORGAN CHASE BANK, N.A.,

as Administrative Agent,

and

The Lenders Party Hereto

FIRST AMENDMENT TO CREDIT AGREEMENT

THIS FIRST AMENDMENT TO CREDIT AGREEMENT (this “First Amendment”) dated as of November 14, 2014, is among ANADARKO PETROLEUM CORPORATION, a Delaware corporation (the “Borrower”); JPMORGAN CHASE BANK, N.A., as administrative agent (in such capacity, together with its successors in such capacity, the “Administrative Agent”) for the lenders party to the Credit Agreement referred to below (collectively, the “Lenders”); and the undersigned Lenders.

R E C I T A L S

A. The Borrower, the Administrative Agent and the Lenders are parties to that certain Credit Agreement dated as of June 17, 2014 (the “Credit Agreement”).

B. The Borrower has requested and the Lenders have agreed to amend certain provisions of the Credit Agreement.

C. NOW, THEREFORE, in consideration of the premises and the mutual covenants herein contained, for good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto agree as follows:

Section 1. Defined Terms. Each capitalized term used herein but not otherwise defined herein has the meaning given such term in the Credit Agreement. Unless otherwise indicated, all references to Sections in this First Amendment refer to Sections of the Credit Agreement.

Section 2. Amendments to Credit Agreement. The last paragraph of Section 6.02 is hereby amended by replacing the reference to “December 1, 2014” therein with “April 1, 2015”.

Section 3. Conditions Precedent. This First Amendment shall not become effective until the date on which each of the following conditions is satisfied (or waived in accordance with Section 9.02 of the Credit Agreement) (the “Effective Date”):

3.1 The Administrative Agent and the Lenders shall have received, to the extent invoiced at least two Business Days prior to the Effective Date (unless the Borrower otherwise consents), reimbursement or payment of all out-of-pocket expenses (including legal fees) required to be reimbursed or paid by the Borrower hereunder.

3.2 The Administrative Agent shall have received from each Lender and the Borrower, counterparts (in such number as may be requested by the Administrative Agent) of this First Amendment signed on behalf of such Persons.

Section 4. Miscellaneous.

4.1 Ticking Fee. As consideration for the Commitments of the Lenders, the Borrower agrees to pay to the Administrative Agent, for the account of each Lender, a ticking fee (the “Ticking Fee”) at the Facility Fee Rate on each Lender’s Commitment, accruing from and including (a) October 15, 2014 until (b) the earlier to occur of (i) the Availability Date; (ii) the date on which the Commitments have terminated or expired (the “Commitment Termination Date”); or (iii) April 1, 2015 (such earlier date, the “Ticking Fee End Date”). The accrued and unpaid portion of the Ticking Fee will be fully earned and shall be due and

payable in cash: (1) on the date that is the earlier of (x) December 1, 2014 or (y) the Ticking Fee End Date; and (2) if the Ticking Fee End Date has not occurred on or before December 1, 2014, on the date that is the earlier of (x) March 1, 2015 or (y) the Ticking Fee End Date; and (3) if the Ticking Fee End Date has not occurred on or before March 1, 2015, on the Ticking Fee End Date. The Ticking Fee shall be paid in immediately available funds without setoff, counterclaim or deduction and shall not be refundable under any circumstances. The Ticking Fee payable pursuant to this Section 4.1 shall be in lieu of any other ticking fee payable pursuant to the Commitment Letter (including the Term Sheet attached thereto) dated as of May 15, 2014 by and among the Borrower, the Arrangers and the other parties thereto or under any fee letter between the Borrower and any Arranger executed in connection therewith.

4.2 Confirmation. The provisions of the Credit Agreement, as amended by this First Amendment, shall remain in full force and effect following the effectiveness of this First Amendment.

4.3 Ratification and Affirmation; Representations and Warranties. The Borrower hereby: (a) acknowledges the terms of this First Amendment; (b) ratifies and affirms its obligations under, and acknowledges, renews and extends its continued liability under, each Loan Document to which it is a party and agrees that each Loan Document to which it is a party remains in full force and effect, except as expressly amended hereby, after giving effect to the amendments contained herein; (c) agrees that from and after the Effective Date each reference to the Credit Agreement and the other Loan Documents shall be deemed to be a reference to the Credit Agreement, as amended by this First Amendment; and (d) represents and warrants to the Lenders that as of the date hereof, after giving effect to the terms of this First Amendment: (i) all of the representations and warranties contained in each Loan Document to which it is a party are true and correct in all material respects, unless such representations and warranties are stated to relate to a specific earlier date, in which case, such representations and warranties shall continue to be true and correct as of such earlier date and (ii) no Default has occurred and is continuing.

4.4 Loan Document. This First Amendment is a “Loan Document” as defined and described in the Credit Agreement and all of the terms and provisions of the Credit Agreement relating to Loan Documents shall apply hereto.

4.5 Counterparts. This First Amendment may be executed by one or more of the parties hereto in any number of separate counterparts, and all of such counterparts taken together shall be deemed to constitute one and the same instrument. Delivery of this First Amendment by facsimile transmission shall be effective as delivery of a manually executed counterpart hereof.

4.6 NO ORAL AGREEMENT. THIS FIRST AMENDMENT, THE CREDIT AGREEMENT AND THE OTHER LOAN DOCUMENTS EXECUTED IN CONNECTION HEREWITH AND THEREWITH REPRESENT THE FINAL AGREEMENT AMONG THE PARTIES AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS, OR UNWRITTEN ORAL AGREEMENTS OF THE PARTIES. THERE ARE NO ORAL AGREEMENTS BETWEEN THE PARTIES.

4.7 GOVERNING LAW. THIS FIRST AMENDMENT (INCLUDING, BUT NOT LIMITED TO, THE VALIDITY AND ENFORCEABILITY HEREOF) SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.

[SIGNATURES BEGIN NEXT PAGE]

IN WITNESS WHEREOF, the parties hereto have caused this First Amendment to be duly executed as of the date first written above.