Basinal indications seen on Tanzanian onshore PSAs

Aerogravity and magnetic surveys conducted in 2012 have confirmed the presence of sedimentary basins on the Kilosa-Kilombero PSA and the possibility of sedimentary basins on the Pangani PSA onshore coastal Tanzania, said Otto Energy Ltd., Perth.

Otto Energy and its partner Swala Oil & Gas (Tanzania) Ltd. as operator have committed to year two in both PSAs and will shoot as much as 500 line-km of 2D seismic. Seismic results will be available by the end of 2013 when they will decide whether to drill.

Otto Energy applauded “the likely presence of Tertiary rift basins with a geological setting that may be similar to the recent Tullow Oil discoveries in Kenya’s Lokichar basin.”

On the 17,675 sq km Kilosa-Kilombero PSA, more than 14,000 line-km of airborne surveys completed in October 2012 confirmed the presence of three basins totaling 2,000 sq km.

Kilosa and Kidatu, the northern two basins, contain an estimated 6,000-7,000 m of sediment, some of which is likely to be of Karoo age, and potential exists for several thousand meters of Neogene fill. The southern Kilombero basin is believed predominantly Neogene in age and also exhibited anomalous stressed vegetation identified as being potentially caused by hydrocarbon seeps.

A minimum of 300 line-km and geochemical samples will be acquired in 2013.

On the 17,156 sq km Pangani PSA in and around the Same district in northern Tanzania, more than 8,000 line-km of airborne surveys suggest the presence of two sedimentary basins of about 2,000 sq km each.

Initial depth modeling from the gravity and magnetic data indicates the basins may contain several thousand meters of Neogene sediments. At least 200 line-km of 2D seismic and geochemical samples will be acquired this year.

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