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Content analysis
?Positive | ||
Negative | ||
Uncertain | ||
Constraining | ||
Legalese | ||
Litigous | ||
Readability |
8th grade Avg
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Exhibit 15.4
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Gaffney, Cline & Associates, Inc. | |
5555 San Felipe Street | |
Suite 550 | |
Houston, TX 77056, USA | |
Telephone: +1 713 850 9955 | |
www.gaffney-cline.com |
DKM/gjh/AH-13-2048.00/gcah.138.14 | April 21, 2014 |
Board of Directors
Ecopetrol, S. A.
Edificio Principal
Cr 13 No.36-24
Bogotá, Colombia
CONSENT OF GAFFNEY, CLINE & ASSOCIATES
Dear Sirs,
As independent reserve engineers for Ecopetrol S.A.(Ecopetrol), Gaffney, Cline & Associates (GCA) hereby confirms that it has granted and not withdrawn its consent to the references to GCA and to the inclusion of information contained in our report entitled “Reserve Audit for Sixty Six Fields in Colombia as of December 31, 2013”, dated March 03, 2014, prepared for Ecopetrol, and to the annexation of our report as an exhibit in Ecopetrol’s annual report on Form 20-F for the year ended December 31, 2013, 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 July 26, 2013 (the Registration Statement). GCA further consents to the reference to “GCA” as set forth in the Registration Statement under the heading “Experts”.
Yours faithfully,
GAFFNEY, CLINE & ASSOCIATES, INC.
David K. Morgan
Technical Director