Ghana: Light oil reservoirs found at Tweneboa complex
A Tullow Oil PLC-operated appraisal well at Ntomme in the Deepwater Tano block offshore Ghana has located 128 net ft of light oil pay in sandstone reservoirs of excellent quality.
The Ntomme-2A well results enhance the value of the Greater Tweneboa, Enyenra, and Ntomme (TEN) complex, said Anadarko Petroleum Corp., which has an 18% working interest in the block.
Anadarko said, “"Our 3D seismic modeling, coupled with the pressure data collected from the Ntomme-2A and Tweneboa-3 sidetrack wells, indicates the potential for an oil column of more than 400 ft below the gas-condensate accumulation encountered in the Tweneboa-3 sidetrack well. The partnership plans to incorporate this new information into its ongoing program as we advance the development of the TEN complex.”
Fluid samples recovered from the Ntomme-2A well indicate oil of 35° gravity, and oil now makes up the majority of the resource in place, Anadarko added.
Ntomme-2A went to 12,810 ft total depth in 5,675 ft of water 2.8 miles south of the Tweneboa-3 sidetrack. The partnership plans to install gauges in the Tweneboa-3 sidetrack prior to a planned drillstem test at Ntomme-2A.
Other Deepwater Tano block interests are Tullow 49.95%, Kosmos Energy Co. 18%, Sabre Oil & Gas Holdings Ltd. 4.05%, and Ghana National Petroleum Corp. 10% carried.
About the Author
Alan Petzet
Chief Editor Exploration
Alan Petzet is Chief Editor-Exploration of Oil & Gas Journal in Houston. He is editor of the Weekly E&D Newsletter, emailed to OGJ subscribers, and a regular contributor to the OGJ Online subscriber website.
Petzet joined OGJ in 1981 after 13 years in the Tulsa World business-oil department. He was named OGJ Exploration Editor in 1990. A native of Tulsa, he has a BA in journalism from the University of Tulsa.