The well, which is located over 6km south-east of the Tweneboa-2 well and 12km south-east of the Tweneboa-1 discovery well, was planned with two deviated boreholes to test separate areas of the Tweneboa field.
In the first phase, the well encountered thin reservoir sands and 9m of gas condensate pay, followed by a gross vertical reservoir interval of 65m containing 34m of net gas condensate in the second phase.
Tweneboa-3 was drilled by the Deepwater Millennium drillship to a total depth of 3,906m in a water depth of 1,601m.
The rig will remain in the Deepwater Tano block to drill the top-hole section of the Tweneboa-4 appraisal well.
Tullow Oil is operator of the Deepwater Tano licence with a 49.95% stake. Its partners include Kosmos Energy Ghana, Anadarko Petroleum, Sabre Oil & Gas and the Ghana National Petroleum Corporation.