Exhibit 23.6

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

     We hereby consent to the incorporation by reference into this Form S-4 registration statement being filed on even date herewith of our reports dated March 16, 2009 relating to the consolidated financial statements of Edge Petroleum Corporation and to the effectiveness of Edge Petroleum Corporation’s internal control over financial reporting included in Mariner Energy, Inc.’s Current Report on Form 8-K dated December 31, 2009, as amended by a Form 8-K/A of the same date. Our report contains an explanatory paragraph regarding the ability of Edge Petroleum Corporation to continue as a going concern.

/s/ BDO Seidman, LLP  

BDO SEIDMAN, LLP 

Houston, Texas
May 19, 2010