Tullow Oil plc, an oil and gas exploration and production group, on Monday announced that it has discovered gas offshore Ghana.
It said its concession called the Tweneboa-3 appraisal well in the Deepwater Tano licence offshore had successfully encountered gas condensate in excellent quality sandstone reservoirs.
A statement issued by the company in Accra said results of drilling, wireline logs and samples of reservoir fluids, together with the well’s down-dip position, confirmed the potential.
The company said the well, located over six kilometres south-east of the Tweneboa-2 well and 12 kilometres south-east from the Tweneboa-1 discovery well, was planned with two deviated boreholes to test separate areas of the Tweneboa Field.
It said the first leg was drilled to calibrate the potential of an area with a very weak seismic response. Within prognosis, this leg encountered thin reservoir sands and approximately 9 metres of gas condensate pay.
The well was then sidetracked 550 metres west, targeting the significant Ntomme anomaly, an area of strong seismic response.
Tullow said this leg successfully encountered a gross vertical reservoir interval of approximately 65 metres containing 34 metres of net gas condensate pay in two zones of high quality stacked reservoir sandstones.
Meanwhile, it said, work was under way to integrate seismic, pressure and hydrocarbon phase data in order to progress development options for the Tweneboa and Enyenra (Owo) fields in the Greater Tweneboa Area.
Tullow (49.95%) operates the Deepwater Tano licence and is partnered by Kosmos Energy Ghana (18%), Anadarko Petroleum (18%), Sabre Oil and Gas (4.05%) and the Ghana National Petroleum Corporation (GNPC) (10% carried interest)
