Drilling Report

Cairn Energy PLC 1 August 2001 FOR IMMEDIATE RELEASE 1 August 2001 CAIRN ENERGY PLC Update on Drilling Operations Offshore Eastern India Prospect 'P' - Oil and Gas Discovery on Block KG-DWN-98/2 Block KG-DWN-98/2 - Prospect 'P' Cairn has made a third hydrocarbon discovery on Block KG-DWN-98/2 offshore Andhra Pradesh in Eastern India with its exploration well DWN-P-1. The well is located in 493 metres of water approximately 12.5 kilometres north-west of the 'R' gas discovery. DWN-P-1 reached a total depth of 2,585 metres and encountered two hydrocarbon bearing units. The first unit comprised a gas cap with a thin oil leg and the deeper second unit comprised a thin gas column with an estimated oil column of 75 metres. The reservoirs are predominantly thinly laminated sands and further appraisal will be required. Preparations for a testing programme have commenced on the discovery, the results of which will be announced in due course. Block KG-OS/6 - Prospect '6' Drilling operations on prospect '6' have been terminated following several failed attempts to continue drilling after encountering a shallow gas reservoir at 600 metres and water flows from sands just below the seabed. The Energy Searcher drill ship is currently being de-mobilised and it is anticipated that exploration drilling will recommence on prospect '6' in 2002 with a special top hole casing design and a more specialised drilling rig. Ravva The Aban II rig is jacked up in the outer anchorage of Kakinada port undergoing final inspections before commencing the Ravva development drilling programme which is scheduled to commence in August 2001. The drilling programme, which comprises three new development wells, two workovers and the tie-back and completion of a prior discovery well, is expected to be completed in Q1 2002. Enquiries:- Cairn Energy PLC: Bill Gammell, Chief Executive Tel: 0131 475 3000 Dr Mike Watts, Exploration Director Tel: 0131 475 3000 Kevin Hart, Finance Director Tel: 0131 475 3000 Brunswick Group Limited: Victoria Sabin, Mark Antelme Tel: 0207 404 5959 Notes to Editors:- 1. 'Cairn' where referred to in this release means Cairn Energy PLC and/or its subsidiaries, as appropriate. 2. Cairn holds a 100% equity interest in Block KG-DWN-98/2. In the event of a commercial discovery Oil & Natural Gas Company Ltd ('ONGC') has no back-in right as the block falls under the terms of India's New Exploration Licensing Policy. 3. Cairn holds a 50% equity interest in Block KG-OS/6. The remaining 50% is held by Videocon Petroleum Limited ('Videocon'). 4. Cairn holds a 22.5% equity interest in Block PKGM-1 (Ravva). The remaining interests are held by ONGC, Videocon and Ravva Oil (Singapore) Pte Limited.
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