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10-Q/A - FORM 10-Q/A - Oasis Petroleum Inc.h78357e10vqza.htm
EX-31.2 - EX-31.2 - Oasis Petroleum Inc.h78357exv31w2.htm
EX-10.4 - EX-10.4 - Oasis Petroleum Inc.h78357exv10w4.htm
Exhibit 31.1
CERTIFICATION
I, Thomas B. Nusz, certify that:
  1.   I have reviewed this quarterly report on Form 10-Q/A of Oasis Petroleum Inc.; and
 
  2.   Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report.
         
     
Date: December 16, 2010  /s/ Thomas B. Nusz    
  Thomas B. Nusz   
  Chairman, President and Chief Executive Officer (Principal Executive Officer)   

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