In a press statement copied to ghanabusinessnews.com Thursday January 21, 2010, Tullow says “the Tweneboa-2 exploratory appraisal well, being drilled some 6 km southeast 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 statement said.
According to the statement, a combined hydrocarbon column of at least 350 metres 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.
It added that the well has encountered a gross reservoir interval of 153 metres containing 32 metres of net hydrocarbon pay in stacked reservoir
sandstones, comprising a 17 metre oil bearing zone below a 15 metre
gas-condensate bearing zone.
Tullow Oil which is the major stakeholder in Ghana’s largest oil field, which is said to be the largest to be discovered in West Africa in the last 10 to 15 years has 49.95% in the Deepwater Tano licence and is partnered by
Kosmos Energy (18%), Anadarko Petroleum (18%), Sabre Oil & Gas (4.05%) and the Ghana National Petroleum Corporation (GNPC) (10% carried interest).
Commercial production of oil in Ghana is expected to begin this year.
By Emmanuel K. Dogbevi