In 2006, the Group completed a considerable amount of work to establish a stratigraphic framework for the whole of the southern Tanzanian offshore area in order to gain a better understanding of potential reservoir distribution and source potential. Infill 2D seismic surveys were acquired in Block 1 in 2005 and Blocks 3 and 4 in 2006. Further 2D and 3,500km2 of 3D seismic data across all three blocks were acquired in 2008 to mature a number of prospects to a drillable status.
Based on these data, the Group has built a significant portfolio of large prospects, many of which have multiple targets. The probability for success for many of these prospects is enhanced because of the interpreted presence of seismic Direct Hydrocarbon Indicators (DHIs). DHIs are the observed response from the hydrocarbon-water contact or the change in response between hydrocarbon saturated and water saturated reservoir rocks. Both types of DHIs are observed in Blocks 1, 3 and 4.
There is a considerable body of evidence to suggest that the petroleum system in the deepwater areas can generate oil, but nearby discoveries at Mnazi Bay, Songo Songo, Mafia Island, Windjammer suggest that gas will also be present. Given the size of the prospects, it is likely that gas discoveries would be commercially attractive and able to support a significant LNG development. The Joint Venture has entered into a series of mid-stream gas commercialisation agreements with the Government of Tanzania that provide the basis under which significant gas discoveries can be developed.
The Joint Venture is currently in the First Extension Period for Blocks 1, 3 and 4. The First Extension Period is for a term of four years and carries a work commitment of one well in each block. The Second Extension Period is for a term of three years and carries a work commitment of a single well in Block 1 and two wells in each of Blocks 3 and 4.
The Joint Venture has drilled 3 wells between September 2010 and April 2011. In January 2011, the Company commenced the acquisition of a 5,000km2 3D survey.
For further details please refer to various presentations made by the Company.
Africa Upstream 2009
EAPC 2009
EAPC 2007