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Exhibit 23.3
DeGolyer and MacNaughton
5001 Spring Valley Road
Suite 800 East
Dallas, Texas 75244
March 21, 2023
Board of Directors
Ecopetrol S.A.
Carrera 13 No. 36-24
Bogota, D.C. Colombia
Ladies and Gentlemen:
We hereby consent to the references to DeGolyer and MacNaughton and to the inclusion of and information derived from our report of third party dated February 14, 2023, containing our opinions regarding our estimates, as of December 31, 2022, of the proved oil, condensate, natural gas liquids, gas, and oil equivalent reserves of certain selected properties that Ecopetrol S.A. has represented it holds in Colombia and the United States as set forth under the headings “3. Business Overview–3.5 Exploration and Production–3.5.3 Reserves,” “8. Financial Statements” and “10. Exhibits” in the Annual Report on Form 20-F of Ecopetrol S.A. for the year ended December 31, 2022 (the Annual Report), and to the incorporation by reference of this consent and our report of third party into Ecopetrol S.A.’s registration statement on Form F-3 filed with the United States Securities and Exchange Commission on May 28, 2021 (the Registration Statement). We further consent to the references to DeGolyer and MacNaughton as set forth in the Registration Statement under the heading “Experts,” provided, however, that we are necessarily unable to verify the accuracy of the reserves estimates contained in the Annual Report because our estimates of reserves have been combined with estimates of reserves prepared by other petroleum consultants.
| Very truly yours, |
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| /s/ DeGolyer and MacNaughton |
| DeGOLYER and MacNAUGHTON |
| Texas Registered Engineering Firm F-716 |