AIC Mines Ltd IAUFF

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Harken Energy Commences Seismic Data Study for Rio Verde Contract in Colombia Cumulative Production on Rio Verde Contract 48,000 Barrels to Date DALLAS, May 23, 2005 /PRNewswire-FirstCall via COMTEX/ -- Harken Energy Corporation (Amex: HEC) announced its 70% owned subsidiary, Global Energy Development PLC (Global), has commenced work to acquire approximately 56 kilometers of new 2D seismic within its Rio Verde Exploration and Production Contract in Colombia. The seismic is being acquired around the two producing wells located on the Rio Verde acreage, the Tilodiran #1 and Macarenas #1, in order to evaluate and then proceed with the drilling of additional wells within the contract area. In addition, a proportion of the seismic is being acquired elsewhere in the contract area to consider future exploratory wells. The new seismic will be processed alongside with the reprocessing of 300 kilometers of existing seismic as required under the terms of the contract. "The company is very pleased with the progress made in the Rio Verde Contract," said Stephen Voss, Managing Director of Global. "The Tilodiran #1 and Macarenas #1 were rapidly brought on to production following the contract signing in September last year and have had good ongoing performance." Cumulative production to date from Tilodiran #1 and Macarenas #1, which commenced in December 2004 and January 2005 respectively, is approximately 48,000 barrels. "The new seismic data will enable Global to select optimum locations for further drilling in Rio Verde and we hope to be able to commence the drilling of Tilodiran #2, before the end of 2005," said Voss. Harken Energy Corporation is engaged in oil and gas exploration, development and production operations both domestically and internationally through its various subsidiaries. Additional information may be found at the Harken Energy Web site, www.harkenenergy.com , or by calling Bevo Beaven or Bill Conboy at CTA Public Relations at [phone].