More oil to flow as positive signs of discovery emerge in Ghana

Mar 11, 2011 12:00 AM

By Moses Dotsey Aklorbortu

Ghana stands the chance of quadrupling its daily oil production as a result of positive signs of excellent sandstone quality of crude oil on various appraisals in the Deepwater Tano Licence. Experts say if these new discoveries are developed for production, the country’s current daily output of 120,000 barrels may move up by 4 times.

Speaking to the Daily Graphic, a lead geologist with the Ghana National Petroleum Corporation (GNPC), Mr Ben Kwame Asante, said the good news was that every appraisal after the discovery of oil came with encouraging results. Mr Asante explained that as the appraisals and discoveries of the country’s oil offshore proved significant, leading to its development and production, the country’s daily output could quadruple.

Asante said that in Phase II of the Jubilee Project: the Tweneboa-3 appraisal well in the Deepwater Tano Licence offshore, the Teak-1 exploration well in the West Cape Three Points licence and the latest Enyenra-2A appraisal well in the Deepwater Tano Licence offshore, had all proved successful and the country could become one of the oil giants in Africa.

In a related development, Tullow Oil has announced that its Enyenra-2A appraisal well has proved a major light oil field in the Deepwater Tano License offshore Ghana and has successfully encountered light oil in excellent quality in sandstone reservoirs.
Tullow Oil said the light crude oil had a low density and flowed freely at room temperature. It had low viscosity, low specific gravity and high API gravity due to the presence of a high proportion of light hydrocarbon fractions.

The present appraisal indicates good evidence of communication, with Owo-1 confirming that the Owo oil discovery, now renamed Enyenra, is a major light oil field. Located over 7 km south and down-dip of Owo-1, the well was drilled to appraise the Upper and Lower channels of the Enyenra Oil Field.

The results of drilling, wire-line logs, samples of reservoir fluids and pressure data showed that Enyenra-2A had an intersected 21 metres of net oil pay in the Upper Channel and 11 metres of net oil pay in the Lower Channel. According to Tullow, the pressure data from the Upper Channel had also demonstrated that the oil was in communication with the Owo-1 well.

“The oil pressures in the Lower Channel suggest it may also be in communication with the deeper pools seen in Owo-1 and its side-track,” Tullow Oil said.

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