TULLOW OIL HAS discovered a highly-pressured light hydrocarbon accumulation at the Tweneboa-1 exploration well in its Deepwater Tano license in 1,148 m of water offshore Ghana. The well, drilled to a depth of 3,593 m, encountered 21 m of net pay. The well is now being deepened to further assess the discovery and the up-dip limit of a potential deepwater fan system.