Initial results from a drill stem test on Pweza-3, which is about 70km off the Tanzania coast in some 1,400m of water, confirmed the properties of the Tertiary section reservoir, including flow and connectivity.
According to the company, the first done in Block 4, Pweza-3 test flowed at a maximum 57 million standard cubic feet of gas per day.
The test demonstrated that development wells could flow at higher rates and also confirmed the robustness of the company’s recently announced total gross resource in Tanzania of some 13tcf of gas.
BG Group chief executive Chris Finlayson said, "Our acreage in Block 4 around the Pweza, Chewa and Ngisi discoveries is now fully appraised and tested, with resources in the order of 4 trillion cubic feet (tcf) of natural gas."
The company will move the Deepsea Metro-1 drillship south to Block 1 to drill a further appraisal well on the Mzia discovery.
BG Group as operator has a 60% interest in blocks 1, 3 and 4 offshore Tanzania, with Ophir Energy holding 40%.
The partners at present are assessing 3-D seismic survey data to help identify offshore targets for a new exploration program in 2014.
