Drilling Report

Aminex PLC 20 October 2003 AMINEX PLC ("Aminex" or "the Company") Tanzania drilling update Aminex PLC, the oil and gas company listed in London and Dublin, announces the following progress on its Tanzania drilling project. The Nyuni-1 exploration well, spudded on 26 September and currently drilling at Nyuni Island, offshore Tanzania, has made good progress to date. The third surface casing, 18.5/8", has been set at 450 metres subsea and the drilling crew is currently installing full blowout prevention equipment prior to drilling the next section of the well. The next casing, 13.5/8", is planned to be run to approximately 633 metres subsea, immediately above the well's secondary target in the Eocene formation. The primary target for this well is the Neocomian formation, which is the reservoir formation in the adjacent Songo Songo gas field. This formation is expected to be encountered at approximately 2,350 metres subsea. The secondary shallower targets include Tertiary Eocene sandstones and limestones. Total depth of the well is planned to be approximately 3,000 metres subsea and is expected to be reached in December. Nyuni-1 is the first of two sequential wells being drilled on the Nyuni offshore licence using an F200 land rig owned by Dafora Drilling of Romania and operating from small islands. The second well, Okuza-1, will test a separate but adjacent structure and will be drilled from Okuza Island. The operator is Ndovu Resources Ltd., a wholly-owned subsidiary of Aminex PLC. Partners in the drilling programme are Bounty Oil & Gas NL and Petrom SA. 20 October 2003 Enquiries: Aminex PLC +44 (0)20 7240 1600 Simon Butterfield College Hill +44 (0)20 7457 2020 James Henderson/Phil Wilson-Brown Dennehy Associates +353 1 676 4733 Michael Dennehy This information is provided by RNS The company news service from the London Stock Exchange

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