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Content analysis
?Positive | ||
Negative | ||
Uncertain | ||
Constraining | ||
Legalese | ||
Litigous | ||
Readability |
8th grade Avg
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Exhibit 15.4
Gaffney, Cline & Associates, Inc.
1300 Post Oak Blvd., Suite 1000 Houston, TX 77056 Telephone: +1 713 850 9955 www.gaffney-cline.com
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DKM/gjh/C2048.00/gcah.172.12 | April 19, 2012 |
Board of Directors
Ecopetrol, S. A.
Edificio Principal
Cr 13 No.36-24
Bogota, Colombia
Consent of Independent Petroleum Engineers
Gentlemen:
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, 2011 (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 07, 2012 (our “Report”) as Exhibit 99.2 to the Annual Report, as well as to the incorporation by reference of this consent and our Report into Ecopetrol S.A.’s registration statement on Form F-3 filed with the United States Securities and Exchange Commission on February 12, 2010.
Yours sincerely,
GAFFNEY, CLINE & ASSOCIATES, INC.
David K. Morgan
Principal – Petroleum Engineering