The well, which is located over 7km south and down-dip of Owo-1, was drilled to a total depth of 4,234m in water depths of 1,674m to appraise the upper and lower channels of the Enyenra oil field.
The company said that good evidence of communication with Owo-1 confirms that the Owo oil discovery, now renamed Enyenra, is a major light oil field.
Results of drilling, wireline logs, samples of reservoir fluids and pressure data show that Enyenra-2A has intersected 21m of net oil pay in the upper channel and 11m of net oil pay in the lower channel.
The well also tested a deeper Turonian fan where 5m of gas-condensate bearing sandstones were intersected.
On completion of operations, the well will be suspended for later use while prior to flow testing, pressure gauges will be deployed to measure reservoir connectivity.
Tullow (49.95%) operates the Deepwater Tano license and is partnered by Kosmos Energy (18%), Anadarko Petroleum (18%), Sabre Oil & Gas (4.05%) and the Ghana National Petroleum (GNPC) (10% carried interest).