Tullow sidetrack extends 'major' Owo field

13th Sep 2010 07:03

Tullow Oil's Owo field just got bigger, "significantly" extended by a sidetrack at the Irish explorer's previously announced Owo-1 discovery, offshore Ghana.Results of drilling, wireline logs and samples of reservoir fluids at the well in the Deepwater Tano licence confirm that Owo is a "major" new oil field, Tullow crowed Monday.The Owo-1 well encountered 53 metres of net oil pay and the sidetrack, drilled in water 1,428 metres deep 0.6 km to the east, found an extra 16 metres of net oil pay in the lower part of the same channel system. "Pressure data indicates that this oil pay is in communication with the reservoirs penetrated in the Owo-1 well and confirms at least 69 metres of total net oil pay in a substantial gross oil column of 200 metres," read a statement. There's 13 metres of net condensate pay beneath Owo, with six metres of net gas pay logged in the deepest sand encountered. No water was encountered in any of the hydrocarbon bearing reservoirs.Tullow, which has a 49.95% stake in Tano and is operator of the licence, is staying in the block to drill the Onyina-1 exploration well which targets a large Campanian prospect between the Tweneboa and Jubilee fields. "Appraisal wells are currently being planned to extend the main Owo oil discovery up-dip and down-dip, to appraise the adjacent Tweneboa oil and gas condensate accumulation and, to refine further our estimates of recoverable resources of both fields," said exploration director Angus McCoss."The discovery of very material volumes of light oil in Owo and the fact that the oil is concentrated in high quality channel sands greatly enhances our outlook for the efficient future development of both the Owo and Tweneboa fields."Kosmos Energy Ghana (18%), Anadarko Petroleum (18%), Sabre Oil & Gas (4.05%) and the Ghana National Petroleum Corporation (GNPC) (10% carried interest), are partnering Tullow.