EXHIBIT 10.1

                                                    
US 3830970v.4

THIRD AMENDMENT
TO THE
CREDIT AGREEMENT

dated as of October 20, 2015
among
ENERGEN CORPORATION,
as Borrower,
WELLS FARGO BANK, NATIONAL ASSOCIATION,
as Administrative Agent,
THE GUARANTOR SIGNATORY HERETO,
and
THE LENDERS SIGNATORY HERETO

                                                    

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THIRD AMENDMENT TO
CREDIT AGREEMENT
This THIRD AMENDMENT TO THE CREDIT AGREEMENT (this “Third Amendment”), dated as
of October 20, 2015 (the “Third Amendment Effective Date”), is among ENERGEN
CORPORATION, a corporation formed under the laws of the State of Alabama
(“Borrower”); the undersigned guarantor (the “Guarantor”, and together with
Borrower, the “Credit Parties”); each of the Lenders party hereto; and WELLS
FARGO BANK, NATIONAL ASSOCIATION, as administrative agent for the Lenders (in
such capacity, together with its successors in such capacity, “Administrative
Agent”).
Recitals
A.    Borrower, Administrative Agent and the Lenders are parties to that certain
Credit Agreement dated as of September 2, 2014 (as heretofore amended, modified,
supplemented or restated, the “Credit Agreement”), pursuant to which the Lenders
have, subject to the terms and conditions set forth therein, made certain credit
available to and on behalf of Borrower.
B.    The parties hereto desire to enter into this Third Amendment to amend
Section 2.07(e) of the Credit Agreement as set forth herein, to be effective as
of the Third Amendment Effective Date.
C.    The Lenders party hereto also desire to complete the October 1, 2015
Scheduled Redetermination as set forth herein.
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 which is defined in the Credit
Agreement, but which is not defined in this Third Amendment, shall have the
meaning ascribed to such term in the Credit Agreement (as amended hereby).
Unless otherwise indicated, all section references in this Third Amendment refer
to the Credit Agreement.
Section 2.    Amendment to Section 2.07(e). In reliance on the representations,
warranties, covenants and agreements contained in this Third Amendment, and
subject to the satisfaction of the conditions precedent set forth in Section 4
hereof, Section 2.07(e) of the Credit Agreement is hereby amended, effective as
of the Third Amendment Effective Date, to replace the reference to “October 1,
2015” appearing in clause (y) of the third sentence of Section 2.07(e), with
“April 1, 2016”.
Section 3.    Borrowing Base Redetermination; Reduction of Aggregate Commitment.
3.1    Subject to the satisfaction of the conditions precedent set forth in
Section 4 hereof, Administrative Agent and the Lenders hereby agree that for the
period from and including the Third Amendment Effective Date to but excluding
the next Redetermination Date, the amount of the

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Borrowing Base shall be equal to $1,400,000,000 (the “October 2015
Redetermination”). Administrative Agent, the Lenders and Borrower agree that the
foregoing constitutes the October 1, 2015 Scheduled Redetermination and that
this Third Amendment shall constitute the New Borrowing Base Notice with respect
to such Scheduled Redetermination. Notwithstanding the foregoing, the Borrowing
Base may be subject to further redeterminations and adjustments from time to
time pursuant to Section 2.07 or Section 8.12(c).
3.2    Concurrently with the October 2015 Redetermination, the Aggregate
Commitment shall be reduced (ratably among the Lenders in accordance with each
Lender’s Applicable Percentage) pursuant to Section 2.06(b)(iii), so that the
Aggregate Commitment equals $1,400,000,000 (and Annex I is hereby deemed amended
to reflect the reduction to each Lender’s Commitment and the Aggregate
Commitment).
Section 4.    Conditions Precedent. The effectiveness of this Third Amendment is
subject to the following:
4.1    Administrative Agent shall have received counterparts of this Third
Amendment from the Credit Parties and the Required Lenders.
4.2    Administrative Agent shall have received such other documents as
Administrative Agent or special counsel to Administrative Agent may reasonably
request.
Administrative Agent shall notify Borrower and the Lenders of the effectiveness
of this Third Amendment, and such notice shall be conclusive and binding.

Section 5.    Representations and Warranties; Etc. Each Credit Party hereby
affirms: (a) that as of the date hereof, the representations and warranties of
Borrower and Guarantor set forth in each Loan Document are true and correct in
all material respects (or, if qualified by materiality or Material Adverse
Effect, in all respects), except to the extent any such representations and
warranties are expressly limited to an earlier date, in which case, on and as of
the date hereof, such representations and warranties continue to be true and
correct in all material respects (or, if qualified by materiality or Material
Adverse Effect, in all respects) as of such specified earlier date and (b) that
as of the date hereof, no Default or Event of Default has occurred and is
continuing or would result from this Third Amendment.
Section 6.    Miscellaneous.
6.1    Confirmation and Effect. The provisions of the Credit Agreement (as
amended by this Third Amendment) shall remain in full force and effect in
accordance with its terms following the effectiveness of this Third Amendment.
Each reference in the Credit Agreement to “this Agreement”, “hereunder”,
“hereof’, “herein”, or words of like import shall mean and be a reference to the
Credit Agreement as amended hereby, and each reference to the Credit Agreement
in any other document, instrument or agreement executed and/or delivered in
connection with the Credit Agreement shall mean and be a reference to the Credit
Agreement as amended hereby. The execution, delivery and effectiveness of this
Third Amendment shall not, except as expressly provided herein,

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operate as a waiver of any right, power or remedy of any Lender or the
Administrative Agent under any of the Loan Documents, nor constitute a waiver of
any provision of any of the Loan Documents.
6.2    Ratification and Affirmation of Credit Parties. Each of the Credit
Parties hereby expressly (a) acknowledges the terms of this Third Amendment, (b)
ratifies and affirms its obligations under the Guaranty Agreement and the other
Loan Documents to which it is a party, (c) acknowledges, renews and extends its
continued liability under the Guaranty Agreement and the other Loan Documents to
which it is a party (in each case, as amended hereby), and (d) acknowledges and
confirms that the amendments contemplated hereby shall not limit or impair any
Liens securing the Indebtedness, each of which are hereby ratified, affirmed and
extended to secure the Indebtedness after giving effect to this Third Amendment.
6.3    Counterparts. This Third 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 Third Amendment by facsimile or electronic (e.g.
pdf) transmission shall be effective as delivery of a manually executed original
counterpart hereof.
6.4    No Oral Agreement. This written Third Amendment, the Credit Agreement and
the other Loan Documents executed in connection herewith and therewith represent
the final agreement between the parties and may not be contradicted by evidence
of prior, contemporaneous, or unwritten oral agreements of the parties. There
are no subsequent oral agreements between the parties.
6.5    Governing Law. This Third 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.
6.6    Severability. Any provision of this Third Amendment which is prohibited
or unenforceable in any jurisdiction shall, as to such jurisdiction, be
ineffective to the extent of such prohibition or unenforceability without
invalidating the remaining provisions hereof, and any such prohibition or
unenforceability in any jurisdiction shall not invalidate or render
unenforceable such provision in any other jurisdiction.
6.7    Loan Document. This Third Amendment shall constitute a “Loan Document”
for all purposes under the other Loan Documents.
[signature pages follow]

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IN WITNESS WHEREOF, the parties hereto have caused this Third Amendment to be
duly executed effective as of the date first written above.
BORROWER:         ENERGEN CORPORATION

By:    /S/ CHARLES W. PORTER, JR.    

Name:    Charles W. Porter, Jr.
Title:
Vice President, Chief Financial Officer and Treasurer

GUARANTOR:                ENERGEN RESOURCES CORPORATION

By:    /S/ CHARLES W. PORTER, JR.    

Name:    Charles W. Porter, Jr.
Title:
Vice President, Chief Financial Officer and Treasurer

[SIGNATURE PAGE]
[THIRD AMENDMENT TO THE CREDIT AGREEMENT]
[ENERGEN CORPORATION]

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ADMINISTRATIVE AGENT:
WELLS FARGO BANK, NATIONAL ASSOCIATION,
as Administrative Agent, Issuing Bank and Lender

By:    /S/ LILA JORDAN    
Name:    Lila Jordan
Title:    Managing Director

[SIGNATURE PAGE]
[THIRD AMENDMENT TO THE CREDIT AGREEMENT]
[ENERGEN CORPORATION]

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SYNDICATION AGENT:
BANK OF AMERICA, N.A.,

as Syndication Agent and Lender

By:    /S/ MICHAEL CLAYBORNE    
Name:     Michael Clayborne
Title:    Vice President

[SIGNATURE PAGE]
[THIRD AMENDMENT TO THE CREDIT AGREEMENT]
[ENERGEN CORPORATION]

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CO-DOCUMENTATION AGENT:
COMPASS BANK,

as Co-Documentation Agent and Lender

By:    /S/ DOROTHY MARCHAND    
Name:    Dorothy Marchand
Title:    Managing Director

[SIGNATURE PAGE]
[THIRD AMENDMENT TO THE CREDIT AGREEMENT]
[ENERGEN CORPORATION]

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CO-DOCUMENTATION AGENT:
JPMORGAN CHASE BANK, N.A.,

as Co-Documentation Agent and Lender

By:    /S/ JO LINDA PAPADAKIS    
Name:    Jo Linda Papadakis
Title:    Authorized Officer

[SIGNATURE PAGE]
[THIRD AMENDMENT TO THE CREDIT AGREEMENT]
[ENERGEN CORPORATION]

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CO-DOCUMENTATION AGENT:
REGIONS BANK,

as Co-Documentation Agent and Lender

By:    /S/ WILLIAM A. PHILIPP    
Name:    William A. Philipp
Title:    Senior Vice President

[SIGNATURE PAGE]
[THIRD AMENDMENT TO THE CREDIT AGREEMENT]
[ENERGEN CORPORATION]

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LENDERS:
MUFG UNION BANK, N.A.,

as Lender

By:    /S/ MARK OBERREUTER    
Name:    Mark Oberreuter
Title:    Vice President

[SIGNATURE PAGE]
[THIRD AMENDMENT TO THE CREDIT AGREEMENT]
[ENERGEN CORPORATION]

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CIBC Inc.,
as Lender

By:    /S/ DARLA MAHONEY    
Name:    Darla Mahoney
Title:    Authorized Signatory

By:    /S/ RICHARD ANTL    
Name:    Richard Antl
Title:    Authorized Signatory

[SIGNATURE PAGE]
[THIRD AMENDMENT TO THE CREDIT AGREEMENT]
[ENERGEN CORPORATION]

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MIZUHO BANK, LTD.,
as Lender

By:    /S/ LEON MO    
Name:    Leon Mo
Title:    Authorized Signatory

[SIGNATURE PAGE]
[THIRD AMENDMENT TO THE CREDIT AGREEMENT]
[ENERGEN CORPORATION]

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PNC BANK, NATIONAL ASSOCIATION,
as Lender

By:    /S/ JONATHAN LUCHANSKY    
Name:    Jonathan Luchansky
Title:    Vice President

[SIGNATURE PAGE]
[THIRD AMENDMENT TO THE CREDIT AGREEMENT]
[ENERGEN CORPORATION]

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SUMITOMO MITSUI BANKING CORPORATION,
as Lender

By:    /S/ JAMES D. WEINSTEIN    
Name:    James D. Weinstein
Title:    Managing Director

[SIGNATURE PAGE]
[THIRD AMENDMENT TO THE CREDIT AGREEMENT]
[ENERGEN CORPORATION]

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U.S. BANK NATIONAL ASSOCIATION,
as Lender

By:    /S/ NICHOLAS T. HANFORD    
Name:    Nicholas T. Hanford
Title:    Vice President

[SIGNATURE PAGE]
[THIRD AMENDMENT TO THE CREDIT AGREEMENT]
[ENERGEN CORPORATION]

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BRANCH BANKING AND TRUST COMPANY,
as Lender

By:    /S/ RYAN AMAN    
Name:    Ryan Aman
Title:    Vice President

[SIGNATURE PAGE]
[THIRD AMENDMENT TO THE CREDIT AGREEMENT]
[ENERGEN CORPORATION]

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BMO HARRIS BANK N. A.,
as Lender

By:    /S/ MELISSA GUZMANN    
Name:    Melissa Guzmann
Title:    Vice President

[SIGNATURE PAGE]
[THIRD AMENDMENT TO THE CREDIT AGREEMENT]
[ENERGEN CORPORATION]

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DNB CAPITAL LLC,
as Lender

By:    /S/ ASULV TVELT    
Name:    Asulv Tvelt
Title:    First Vice President

By:    /S/ JOE HYKLE    
Name:    Joe Hykle
Title:    Senior Vice President

[SIGNATURE PAGE]
[THIRD AMENDMENT TO THE CREDIT AGREEMENT]
[ENERGEN CORPORATION]

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ROYAL BANK OF CANADA,
as Lender

By:    /S/ EVANS SWANN    
Name:    Evans Swann
Title:    Authorized Signatory

[SIGNATURE PAGE]
[THIRD AMENDMENT TO THE CREDIT AGREEMENT]
[ENERGEN CORPORATION]

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THE TORONTO DOMINION (NEW YORK) LLC,
as Lender

By:    /S/ RAYAN KARIM    
Name:    Rayan Karim
Title:    Authorized Signatory

[SIGNATURE PAGE]
[THIRD AMENDMENT TO THE CREDIT AGREEMENT]
[ENERGEN CORPORATION]

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BOKF, NA DBA BANK OF OKLAHOMA,
as Lender

By:    /S/ JOHN KRENGER    
Name:    John Krenger
Title:    Vice President

[SIGNATURE PAGE]
[THIRD AMENDMENT TO THE CREDIT AGREEMENT]
[ENERGEN CORPORATION]

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CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH,
as Lender

By:    /S/ DOREEN BARR    
Name:    Doreen Barr
Title:    Authorized Signatory

By:    /S/ WARREN VAN HEYST    
Name:    Warren Van Heyst
Title:    Authorized Signatory

[SIGNATURE PAGE]
[THIRD AMENDMENT TO THE CREDIT AGREEMENT]
[ENERGEN CORPORATION]

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FIFTH THIRD BANK,
as Lender

By:    /S/ LARRY HAYES    
Name:    Larry Hayes
Title:    Director

[SIGNATURE PAGE]
[THIRD AMENDMENT TO THE CREDIT AGREEMENT]
[ENERGEN CORPORATION]

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SYNOVUS BANK,
as Lender

By:    /S/ JOSEPH KEENER    
Name:    Joseph Keener
Title:    Vice President

[SIGNATURE PAGE]
[THIRD AMENDMENT TO THE CREDIT AGREEMENT]
[ENERGEN CORPORATION]

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BARCLAYS BANK PLC,
as Lender

By:    /S/ MAY HUANG    
Name:    May Huang
Title:    Assistant Vice President

[SIGNATURE PAGE]
[THIRD AMENDMENT TO THE CREDIT AGREEMENT]
[ENERGEN CORPORATION]

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MORGAN STANLEY BANK, N. A.,
as Lender

By:    /S/ MATTHEW T. MEYERS    
Name:    Matthew T. Meyers
Title:    Authorized Signatory

[SIGNATURE PAGE]
[THIRD AMENDMENT TO THE CREDIT AGREEMENT]
[ENERGEN CORPORATION]