BG Group discovers natural gas with Chaza-1 offshore Tanzania

Source: BG Group

BG Group announced its third Tanzanian gas discovery with the Chaza-1 well, located in Block 1 approximately 18 kilometers offshore southern Tanzania in a water depth of around 950 meters. The Chaza-1 discovery is some 200 kilometers 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 plc (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 4,000 square kilometers of 3D seismic data. BG Group has the option to assume operatorship of all three blocks upon completion of the initial work program.

To date in 2011, a 3 200 square kilometer 3D seismic survey has been acquired in Blocks 3 and 4, and a second 3D survey of 1 800 square kilometers is nearing completion in Block 1. It is intended that a second drilling campaign will commence in late 2011. 

Tanzanian Discoveries 

In May 2010, BG Group received consent from the government of the United Republic of Tanzania to farm-in to interests held by Ophir Energy plc offshore southern Tanzania in Blocks 1, 3 & 4 of the Mafia Deep Offshore Basin and the northern portion of the Ruvuma Basin. 

In December 2010, BG Group announced that its second Tanzanian exploration well, Chewa-1, had also discovered gas. The well, located in Block 4 approximately 80 kilometers offshore southern Tanzania in a water depth of around 1 300 meters, is some eight kilometers northwest of BG Group's Pweza-1 gas discovery announced in October 2010.

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