Ghana could become the fourth biggest oil producer in sub-Saharan Africa by 2020 once two new offshore fields come onstream, to push total output above 240,000 barrels per day (bbl/d), pan-African bank Ecobank said on Sept. 21.

The West African country produces around 103,000 bbl/d ranking it ninth, far behind leaders Nigeria, which produces an average of 1.867 MMbbl/d, and Angola, with 1.754 MMbbl/d, said the Ecobank research report.

Ghana's Tweneboa-Enyenra-Ntomme (TEN) Field came onstream in August and is expected to increase output to a peak of around 80,000 bbl/d.

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The Jubilee Field, which started producing oil in 2010 and is operated by British oil company Tullow Oil Plc, could bounce back to production of around 115,000 bbl/d once it solves technical problems with its production vessel.

At the same time, the Sankofa field operated by Italian company Eni SpA (NYSE: E) is due to open in August 2017 and should produce around 30,000 bbl/d, while U.S. independent Kosmos Energy Ltd. (NYSE: KOS) plans to connect the Mahogany-Teak-Akasa (MTA) Field to the Jubilee oil production ship.

"Based on existing fields and field development plans Ghana crude oil output is estimated to be over 240,000 bbl/d by 2019. This could potentially make Ghana the fourth largest oil producer in Sub Saharan Africa by 2020," the report said.

Production costs for Ghana's oil projects, which are all in deep water, mean that the crude remains viable if global prices fall to $40/bbl, allowing it to remain attractive to investors in the event of price fluctuations, it said.

Gas from TEN, Sankofa and MTA could eliminate the need for Ghana to import gas from Nigeria through the West African Gas Pipeline Co., it said.