Exhibit 23.3
Gaffney, Cline & Associates Inc. | Four Oaks Place | |
1300 Post Oak Boulevard, Suite 1000 | ||
Houston, Texas 77056 | ||
Telephone: | (713) 850-9955 | |
Technical and Management Advisers to the Petroleum Industry Internationally Since 1962 | Facsimile: Email: | (713) 850-9966 gcah@gaffney-cline.com |
DKM/bgh/C1852.02/gcah.213.11 | July 15, 2011 |
Board of Directors |
Ecopetrol, S. A. |
Edificio Principal |
Cr 13 No. 36 - 24 |
Bogota, Colombia |
Consent of Gaffney, Cline & Associates
Dear Sirs:
As independent reserve engineers for Ecopetrol S.A., Gaffney, Cline & Associates hereby consents to the references to our firm included in Ecopetrol S.A.’s annual report on Form 20-F for the year ended December 31, 20010 (the “Annual Report”), and to the inclusion of our report entitled “Reserve Audit for Forty Five Fields in Colombia As well as Ecopetrol’s Participation in SAVIA S.A.” dated February 28, 2011 (our “Report”) as Exhibit 99.2 to the Annual Report to be filed with the United States Securities and Exchange Commission on July 15, 2011.
Very truly yours,
GAFFNEY, CLINE & ASSOCIATES, INC.
/s/ David K. Morgan |
David K. Morgan
Senior Technical Manager
UNITED KINGDOM UNITED STATES SINGAPORE AUSTRALIA ARGENTINA BRAZIL KAZAKHSTAN RUSSIA UAE |