Operating Upate

Sterling Energy PLC 16 November 2006 16 November 2006 STERLING ENERGY PLC ('Sterling' or the 'Company') OPERATING UPDATE Sterling Energy plc, the AIM listed oil & gas exploration & production company operating in the Gulf of Mexico and Africa, today provides an update on its activities since the publication on 19 September 2006 of its Interim Results. Mauritania Sterling notes the presentation by Woodside, operator of the Chinguetti field, made today, which gave an interim reserves update for proven, probable and contingent resources of 77 million bbls. Of this total, 53 million bbls were proven and probable reserves ('2P'). In addition to an infill well by the end of 2006, a 4D seismic survey is planned for 2007 and a programme of infill wells in late 2007. It also highlighted the high resolution 3D seismic work planned for 2007 on the Tiof field, in which Sterling has a royalty interest, and the concept of a tie-back into Chinguetti facilities with a possible capacity of 50,000 bpd. Chinguetti field production since mid-year has been in the range of 27,000-35,000 bopd. In its 2006 half-year report, Sterling had used a provisional estimate of 2P field reserves of 80 million barrels ('bbls'), based on a 4 phase development of the field. These estimates will be formally reviewed again at the time of publication of the annual results for 2006, in light of further information gained over the coming months. For the development potential of Phases 2 onwards, key data will be obtained from the drilling of the well planned for December. The planned 4D seismic will make it possible to have a much better picture of the ultimate potential recoverable reserves of the Chinguetti field. Under the provisions of the Funding Agreement, Sterling's cash flow continues to reflect its priority of recovering development costs paid by it, through cost oil production. Gulf of Mexico and Gulf Coast Production in the third quarter averaged 8.6 mmcfged, compared with 8.5 mmcfged in the first half of 2006. Shut-ins owing to the pipeline repairs on Gryphon and the planned upgrade at Mustang Island areas, held back production. Energy prices have been lower than in the first half. Gas accounts for some 80% of US production and gas prices to date in the second half have generally ranged between $5.5 and $7.25 per mcf, recently moving over $8 per mcf with the early onset of colder conditions. In line with the strategy of increasing its exposure onshore, Sterling has executed a letter of intent to participate in a 25 well Austin Chalk horizontal well programme in the central Gulf coast region of Texas. Sterling will participate for 25-55% working interest ('WI') in this low risk, infill drilling in existing fields. Based on an independent consultants report, it exposes Sterling to 11 bcfge of net proven and 14 bcfge of net possible reserves. At the end of June 2006, Sterling's 2P USA reserves were over 50 bcfge. With an expected early December completion, this will immediately add approximately 4+ bcfge to proven reserves. With an initial outlay for the lease purchases and the first three wells of approximately $9.5 million, this programme is thereafter expected to be self-funding. Sterling has a 55% WI in the initial test well, which is expected to spud in mid-December. The programme projects that wells will be drilled continuously thereafter on a 90 day basis and Sterling can elect on its participation on a well-by-well basis. The Matagorda Island 520 SE/4 # 4 ST was successfully re-completed in September, increasing net production from 1 mcfgd to 500 mcfgd. Sterling has a 59.5% net revenue interest in the well. At Mustang Island in the Western Gulf, Sterling has completed early, a $4.8 million upgrade of its pipeline and processing facilities to accommodate increased third party production, commencing shortly. Sterling paid $0.25 million of the costs of these upgrades, the remainder being paid by a third party user. This work has resulted in periods of shut-in of the system to accommodate this work. Sterling's transportation and processing revenues are expected to double to over $2.6 million per annum and it will enable an extension of the life of some of its wells. Sterling recently participated with a 22.25% working interest ('WI') in the Davis Petroleum Corp. - #1 Trahan. The well found productive pay but reserves have now been deemed uneconomic. Sterling has farmed out its interest in the High Island 52 Field (50% WI), subject to the drilling of a well in Q1 2007. This farmout excludes Sterling's royalty interest in the Gryphon wells located in the NE quadrant of High Island 52, which have been generating in excess of $0.5 million net per month. Sterling will receive cash of $0.3 million if no well is drilled or it is not commercial. In the event of any development, it will have a 2.75% ORRI and will be relieved of the field abandonment costs, which exceed $2 million net. Abandonment operations are underway on High Island A-68/83 where production ceased in 2003. Seven wells are being plugged and decommissioning of the existing platforms will take place in 2007. The non-operated Galveston 303 #7 well is drilling earlier than expected. Sterling has a 17.3% WI in this 10,873 foot well to capture 1 bcf of net reserves. The well is expected to reach total depth in late-November. The higher potential drilling is expected to start in late November, on the North Theall Heirs #1 exploratory well located onshore south Louisiana. Sterling has a 34% WI in this high risk 15,000 foot well, targeting a net 10-30 bcfge. Preparation also continues on the Thunder Stud prospect in south Louisiana (15% WI). This is Sterling's first onshore operated well, targeting deep reserves (18,000 feet) in excess of 20 bcfge net. Drilling is expected to start in late December. Active programme and seeking acquisitions Chief Executive, Harry Wilson, said: 'Our cash balance, currently over $50 million, continues to increase, supported by liftings from Chinguetti and production in the Gulf of Mexico. Activity over the next year remains at a high level. We have joined an onshore US infill well programme, which will commence in December, adding to our reserves and production. We keenly await the results of the next Chinguetti well due to spud shortly and of the 3 largely carried exploration wells in West Africa and 3 in the USA due by the end of the first half of 2007. We continue to seek further profitable and value adding assets'. Enquiries Sterling Energy (+44 (0)1582 462 121) Web site: www.sterlingenergyplc.com Harry Wilson Graeme Thomson Citigate Dewe Rogerson (+44 (0)20 7638 9571) Media enquiries: Martin Jackson Analyst enquiries: Nina Soon This information is provided by RNS The company news service from the London Stock Exchange

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