BG Group has made its third gas discovery in the Chaza-1 well, located in Block 1 in a water depth of around 950m, offshore Tanzania.

The discovery is made some 200km south of BG Group’s Pweza and Chewa discoveries.

The three successful wells so far drilled by the joint venture of BG Group (60%) and Ophir Energy (40% operator) form part of an initial work program planned for Blocks 1, 3 and 4 offshore Tanzania.

The initial work program also includes the acquisition of a minimum of 4 000sq km of 3D seismic data.

BG Group has the option to assume operatorship of all three blocks upon completion of the initial work program.

Till date in 2011, a 3 200sq km 3D seismic survey has been acquired in Blocks 3 and 4, and a second 3D survey of 1 800sq km is nearing completion in Block 1.

The company plans to begin a second drilling program in late 2011.