Attached files
Exhibit 24.2
OASIS PETROLEUM INC.
Power of Attorney
The undersigned hereby appoints Thomas B. Nusz and Taylor L. Reid, and each of them, any of
whom may act without the joinder of the other, as his true and lawful attorneys-in-fact and agents,
with full power of substitution and resubstitution, for him and in his name, place and stead, in
any and all capacities, to sign any and all amendments (including post-effective amendments) to the
Registration Statement on Form S-1 of Oasis Petroleum Inc. (File No. 333-165212) (the Registration
Statement) and any registration statement (including any amendment thereto) for the offering
contemplated by the Registration Statement that is to be effective upon filing pursuant to Rule
462(b) under the Securities Act of 1933, as amended, and to file the same, with all exhibits
thereto, and all other documents in connection therewith, with the Securities and Exchange
Commission, granting unto said attorneys-in-fact and agents full power and authority to do and
perform each and every act and thing requisite and necessary to be done, as fully to all intents
and purposes as he might or would do in person, hereby ratifying and confirming all that said
attorneys-in-fact and agents or any of them or their or his substitute or substitutes, may lawfully
do or cause to be done by virtue hereof.
IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of
this 19th day of May, 2010.
/s/ Michael McShane
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By: Michael McShane |