BG Group today announced it had completed its appraisal programme in the Jodari field of Block 1 offshore Tanzania, with a drill stem test on the original natural gas discovery well confirming the excellent quality of the Tertiary reservoir.
The drill stem test on the Jodari-1 well, the first in deep water off Tanzania, flowed at a maximum rate of 70 million standard cubic feet of natural gas per day, constrained by testing equipment. The results showed better than expected reservoir properties, including high connectivity and demonstrated that development wells could produce at higher rates.
The drill stem test was conducted on one of the three successful wells on the Jodari field, in 1150 metres of water and approximately 39 kilometres off the coast of southern Tanzania.
BG Group Chief Executive Chris Finlayson said: “The completion of a multi-well exploration and appraisal programme on the Jodari field within a year of the original discovery is a significant achievement and a credit to our team and partners including Ophir Energy and the Government of Tanzania. It builds upon our run of exploration success offshore Tanzania and further demonstrates the potential of BG Group’s acreage.
“Results from the Jodari-1 test have greatly improved our understanding of the sub-surface, reducing uncertainty as we progress our options for commercialising the resource through a potential liquefied natural gas export project and our domestic market obligations,” Finlayson said.
Following the completion of operations at Jodari-1, the drillship Deepsea Metro-1 will relocate 22 kilometres to the north to the Mzia-2 well, also in Block 1. Once there it will test an appraisal well drilled earlier this year.
Prior to the Jodari-1 drill stem test, BG Group’s acreage offshore Tanzania had produced seven consecutive natural gas discoveries and two successful appraisal wells. BG Group is currently conducting a 3-D seismic survey to help identify new offshore targets for its Tanzania exploration programme.
BG Group as operator has a 60% interest in Blocks 1, 3 and 4 offshore Tanzania, with Ophir Energy holding 40%.