Exhibit 23.9
DEGOLYER AND MACNAUGHTON
Canada Limited
311 - 6th Avenue SW, Suite 1430
Energy Plaza, East Tower
Calgary, Alberta, Canada T2P 3H2
TELEPHONE
(403) 266-8680
FAX
(403) 266-1887
Mr. Martin H. Eden
Chief Financial Officer
Gran Tierra Energy Inc. (Gran Tierra)
300m 611 – 10th Ave. SW
Calgary, Alberta T2R 0B2
Gran Tierra Registration Statement
Form S-3
Filed with the U.S. Securities Exchange Commission
Dear Mr. Eden:
As the independent reserve engineers for Solana Resources Limited (Solana), DeGolyer and MacNaughton Canada Limited Inc. Hereby confirms that it has granted and not withdrawn its consent to the reference to DeGolyer and MacNaughton Canada Limited’s review of Solana’s reserves report entitled “Appraisal Report as of December 31, 2007 on Certain Properties owned by Solana Resources Limited” and signed April 10, 2008 in the form and context incorporated by reference by Gran Tierra in this Form S-3 registration statement with the U.S. Securities and Exchange Commission.
DeGolyer and MacNaughton Canada Limited
SIGNED: September 3, 2008
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| |
| /s/ Colin P. Outtrim |
| Colin P. Outtrim, P.Eng |
| Senior Vice President |
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| Canada Limited |
