Exhibit 23.4
CONSENT OF INDEPENDENT AUDITOR
We consent to the incorporation by reference in this Registration Statement on Form S-3 of our report dated June 19, 2015 relating to the financial statements of Petrodelta, S. A. at December 31, 2014 presented in accordance with International Reporting Standards, which appears in the Annual Report on Form 10-K of Harvest Natural Resources, Inc. and its subsidiaries for the year ended December 31, 2014, and to the reference to us under the heading “Experts” in such Registration Statement.
/s/ PGFA Perales, Pistone & Asociados
PGFA Perales, Pistone & Asociados
Valencia, Venezuela
September 29, 2015