Exhibit 23.3
DEGOLYERAND MACNAUGHTON
5001 SPRING VALLEY ROAD
SUITE 800 EAST
DALLAS, TEXAS 75244
April 23, 2010
TransAtlantic Petroleum Ltd.
5910 N. Central Expressway, Suite 1755
Dallas, Texas 75206
Ladies and Gentlemen:
We hereby consent to the use of the name DeGolyer and MacNaughton and to the references to DeGolyer and MacNaughton as an independent petroleum engineering consulting firm under the heading “Independent Petroleum Engineers” in this Post-Effective Amendment No. 1 to the Registration Statement on Form S-1 (No. 333-163976), and to the incorporation by reference of the other references to our firm contained under the heading “Part I – Item 2. Properties” of the Annual Report on Form 10-K for the year ended December 31, 2009, of TransAtlantic Petroleum Ltd. (TransAtlantic) filed with the U.S. Securities and Exchange Commission on March 31, 2010, and to the inclusion of our third-party letter report dated March 2, 2010, containing our opinion on the proved reserves attributable to certain properties owned by TransAtlantic as of December 31, 2009.
Very truly yours,
/s/ DeGolyer and MacNaughton
DeGOLYER and MacNAUGHTON
Texas Registered Engineering Firm F-716
