Exhibit 25.1
   securities and exchange commission
 Washington, D.C. 20549
 
 FORM T-1
 STATEMENT OF ELIGIBILITY UNDER
THE TRUST INDENTURE ACT OF 1939 OF A
CORPORATION DESIGNATED TO ACT AS TRUSTEE
   
 U.S. BANK NATIONAL ASSOCIATION
  31-0841368
  800 Nicollet MallMinneapolis, Minnesota
    
    55402(Address of principal executive offices)
    
    (Zip Code)
 
 OASIS PETROLEUM INC.
  Delaware
    
    80-0554627(State or other jurisdiction of incorporation or organization)
    
    (I.R.S. Employer Identification No.)1001 Fannin Street, Suite 1500Houston, Texas
    
    77002(Address of Principal Executive Offices)
    
    (Zip Code)
 Senior Notes
 (Title of the Indenture Securities)




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FORM T-1
 Item 1.
    
    GENERAL INFORMATION.Furnish the following information as to the Trustee.
 a)
    
    Name and address of each examining or supervising authority to which it
is subject.
 Comptroller of the Currency
Washington, D.C.
 b)
    
    Whether it is authorized to exercise corporate trust powers.
 Yes
 Item 2.
    
    AFFILIATIONS WITH OBLIGOR.If the obligor is an affiliate of the Trustee, describe
each such affiliation.
 None
 Items 3-15
    
    Items 3-15 are not applicable because to the best of the Trustees knowledge, the
obligor is not in default under any Indenture for which the Trustee acts as Trustee.
 Item 16.
    
    LIST OF EXHIBITS:List below all exhibits filed as a part of this statement of
eligibility and qualification.
 1.
    
    A copy of the Articles of Association of the Trustee.*2.
    
    A copy of the certificate of authority of the Trustee to commence
business, attached as Exhibit 2.3.
    
    A copy of the certificate of authority of the Trustee to exercise
corporate trust powers, attached as Exhibit 3.4.
    
    A copy of the existing bylaws of the Trustee.**5.
    
    A copy of each Indenture referred to in Item 4. Not applicable.6.
    
    The consent of the Trustee required by Section 321(b) of the Trust
Indenture Act of 1939, attached as Exhibit 6.7.
    
    Report of Condition of the Trustee as of March 31, 2010 published
pursuant to law or the requirements of its supervising or examining authority,
attached as Exhibit 7.
   2




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SIGNATURE
 th
 By:
    /s/ Steven A. FinkleaSteven A. FinkleaVice President 3




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Exhibit 2
 
 Comptroller of the Currency Administrator of National Banks
Washington, DC 20219
CERTIFICATE OF CORPORATE EXISTENCE I, John Walsh, Acting Comptroller of the Currency, do hereby certify that:
1. The Comptroller of the Currency, pursuant to Revised Statutes 324, et seq., as
amended, 12 U.S.C. 1, et seq., as amended, has possession, custody and control of
all records pertaining to the chartering, regulation and supervision of all National Banking Associations.
2. U.S. Bank National Association, Cincinnati, Ohio, (Charter No. 24), is a
National Banking Association formed under the laws of the United States and is authorized thereunder to transact the
business of banking on the date of this Certificate.
IN TESTIMONY WHERE OF, I have hereunto subscribed my name and caused my seal of office to be affixed
to these presents at the Treasury Department, in the City of Washington and District of Columbia, this September 9, 2010.
Acting Comptroller of the Currency 4




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Exhibit 3
 
 Comptroller of the Currency Administrator of National Banks
Washington, DC 20219
CERTIFICATE OF FIDUCIARY POWERS I, John Walsh, Acting Comptroller of the Currency, do hereby certify that:
1. The Comptroller of the Currency, pursuant to Revised Statutes 324, et seq., as
amended, 12 U.S.C. 1, et seq., as amended, has possession, custody and control of
all records pertaining to the chartering, regulation and supervision of all National Banking Associations.
2. U.S. Bank National Association, Cincinnati, Ohio, (Charter No. 24), was
granted, under the hand and seal of the Comptroller, the right to act in all fiduciary
capacities authorized under the provisions of the Act of Congress approved
September 28, 1962, 76 Stat.668, 12 U.S.C, 92 a, and that the authority so granted
remains in full force and effect on the date of this Certificate.
IN TESTIMONY WHERE OF, I have hereunto subscribed my name and caused
my seal of office to be affixed to these presents at the Treasury Department, in the
City of Washington and District of Columbia, this September 9, 2010.
Acting Comptroller of the Currency 5




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Exhibit 6
 CONSENT
   By:
    /s/ Steven A. FinkleaSteven A. FinkleaVice President 6




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Exhibit 7
U.S. Bank National Association
Statement of Financial Condition
As of 3/31/2011
 ($000s)
 3/31/2011AssetsCash and Balances Due From
Depository Institutions
    
    $
    13,798,547Securities
    
    
    58,784,508Federal Funds
    
    
    4,446,250Loans & Lease Financing Receivables
    
    
    188,553,195Fixed Assets
    
    
    5,071,554Intangible Assets
    
    
    13,223,551Other Assets
    
    
    22,091,641Total Assets
    
    $
    305,969,246LiabilitiesDeposits
    
    $
    215,206,369Fed Funds
    
    
    8,615,219Treasury Demand Notes
    
    
    0Trading Liabilities
    
    
    579,986Other Borrowed Money
    
    
    34,076,282Acceptances
    
    
    0Subordinated Notes and Debentures
    
    
    7,760,721Other Liabilities
    
    
    7,772,817Total Liabilities
    
    $
    274,011,394EquityMinority Interest in Subsidiaries
    
    $
    1,761,010Common and Preferred Stock
    
    
    18,200Surplus
    
    
    14,136,872Undivided Profits
    
    
    16,041,770Total Equity Capital
    
    $
    31,957,852Total Liabilities and Equity Capital
    
    $
    305,969,246
 7