Tweneboa-2 makes significant discoveries

Tullow Oil plc (Tullow) has announced that the Tweneboa-2 exploratory appraisal well, being drilled some 6km SE of the Tweneboa-1 discovery, has intersected a significant combined hydrocarbon column. Results of drilling, wireline logs and samples of reservoir fluids establish that Tweneboa is a major oil and gas-condensate field. The well has encountered a gross reservoir interval of 153m containing 32m of net hydrocarbon pay in stacked reservoir sandstones, comprising a 17m oil bearing zone below a 15m gas-condensate bearing zone. A combined hydrocarbon column of at least 350m has been established between the lowest known oil in Tweneboa-2 and the top of the gas-condensate at Tweneboa-1, demonstrating this is a highly prospective and extensive turbidite fan system that will be evaluated with additional drilling. Following completion of logging operations the well will be deepened to test further exploration potential beneath the Tweneboa field. The well will then be suspended for future use in appraisal and development. The Atwood Hunter semi-submersible drilled Tweneboa-2 in the Deepwater Tano block to an interim depth of 3860m in water depths of 1321m. On completion of operations on Tweneboa-2, the rig will move to drill an exploration well in the West Cape Three Points block east of the Jubilee field. Tullow (49.95%) operates the Deepwater Tano licence and is partnered by Kosmos Energy (18%), Anadarko Petroleum (18%), Sabre Oil & Gas (4.05%) and the Ghana National Petroleum Corp. (GNPC) (10% carried interest).
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