EXHIBIT 23.1 HARVEST NATURAL RESOURCES, INC. CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (Nos. 333-94823, 333-49114 and 333-85900), Form S-3 (No. 333-17231) and Form S-4 (No. 333-42139) of Harvest Natural Resources, Inc. (formerly Benton Oil and Gas Company) of our report dated March 28, 2003 relating to the financial statements and the related financial statement Schedule II - Valuation and Qualifying Accounts, which appears in this Form 10-K. PricewaterhouseCoopers LLP Houston, Texas March 28, 2003