Exhibit 23.1

CONSENT OF INDEPENDENT PETROLEUM ENGINEERS AND GEOLOGISTS

We hereby consent to the reference of our firm and to the use of our report effective December 31, 2017, dated February 16, 2018, in the Cobalt International Energy, Inc. Annual Report on Form 10–K for the year ended December 31, 2017, to be filed with the U. S. Securities and Exchange Commission on or about March 2, 2018.

NETHERLAND, SEWELL & ASSOCIATES, INC.

By:

/s/ C.H. (Scott) Rees III

C.H. (Scott) Rees III, P.E.

Chairman and Chief Executive Officer

Dallas, Texas

March 2, 2018

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Cobalt International Energy, Inc. 10-K