Tanzania has been intermittently explored over the last 50 years. Most of the multinational petroleum companies were represented, in the area, at one time or another. Significant gas discoveries were made at Songo Songo and Mnazi Bay. So far a total of 33 exploration and development wells have been drilled. The cumulative seismic coverage in public domain is approximately 52,000 km; 28,000 km offshore and 24,000 km onshore, including the interior rift basins. There is an additional 11,000 km of modern non-exclusive geophysical data acquired in the year 1999/2000. Though no oil has been produced as yet, available data and geological information point out to the existence of an active petroleum system.  Additional information is contained in the following links:

Exploration History

Database

Regional Geological Setting

Regional Stratigraphy

Hydrocarbon

Source Rock Characteristics