Tanzania has so far made five onshore and shallow water discoveries of natural gas fields in the vicinities of Songo Songo Island, Mnazi Bay, Mkuranga, Kiliwani North and Nyuni. Out of five discoveries, only two gas fields, Songo Songo and Mnazi Bay are producing. Mkuranga and Nyuni gasfields have not been assessed substantively to determine the commerciality of both reservoirs.
BG Group has discovered natural gas bearing sands at a depth of approximately 1,400 metres in Blocks 1, 3 and 4 of the Mafia Deep Offshore Basin and the North Eastern portion of the Ruvuma Basin, approximately 80 km offshore South-East Tanzania. Three exploratory wells (Pweza-1, Chewa-1, and Chaza-1) have been drilled so far, further work to ascertain the commerciality of deep sea discoveries is underway.
Available data indicate that the proven and probable reserves in the Songo Songo gasfield are estimated at 810 billion standard cubic feet (BCF), while the proven, probable and possible reserves stand at 1.10 trillion standard cubic feet (TCF). The proven, probable and possible gas reserves in Mnazi Bay vicinities are estimated at 2.2 TCF. As soon as BG Group finalises its assessment for the commerciality of the deep sea discoveries, the proven reserves will change.
Once Tanzania Petroleum Development Corporation (TPDC) is issued with a Development Licence and enters into agreements with an International Oil Company (IOC) to deliver regulated services, they automatically become regulated entities.
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