BG Group announced Tuesday that it has increased its total recoverable resources estimate for the Mzia discovery and across Blocks 1, 3 and 4 offshore Tanzania, marking the conclusion of a successful drilling and testing campaign. Total gross recoverable resources across these blocks are now estimated to be around 15 Tcf.
BG said the campaign confirmed Mzia as the second giant gas discovery after Jodari in the firm's acreage offshore Tanzania.
The Mzia-3 appraisal well, drilled approximately four miles north of the original Mzia-1 discovery in 5,840 feet of water, has been cored and logged. Results confirm the reservoir sands are extensive and of similar quality to those found in the Mzia-1 and Mzia-2 wells. In addition, the gas-down-to level proven in Mzia-3 is around 330 feet deeper than that of Mzia-2.
Further north, detailed technical analysis of the Block 4 discoveries Chewa, Ngisi and Pweza, which were also appraised and tested in the campaign, was positive with total gross recoverable resources in the block now estimated around 5 Tcf.
BG said these results mean that an extensive exploration and appraisal campaign of 14 wells started in 2010 offshore Tanzania has had a 100-percent success rate with nine consecutive discoveries and five appraisal wells, three of which included drill stem tests showing high flow rates.
BG Group Chief Executive Chris Finlayson commented in a company statement:
"We have sufficient resources for a two-train LNG project in Tanzania. The aim of our appraisal program now is to optimize the future development plan and place the most economic gas into the proposed project first to extract the most value across the chain.
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