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Having reversed a decline in gas output at KG-D6 by starting a new production well, Reliance Industries is repairing three shut wells on the main fields in the block and will take up a similar number later to further improve output.
RIL and partner BP are carrying out remedial action to stop water ingress from choking wells even as the first production well on the block in more than four years ramped up output by over 15 per cent to 13.7 million standard cubic meters per day.
"We can't drill any more wells on (main) Dhirubhai 1 and 3 (D1&D3) fields," RIL Executive Director P M S Prasad told reporters here.
The D1&D3 fields have proved to be less prolific than previously anticipated, forcing RIL to downgrade the recoverable reserves to 2.9 trillion cubic feet (tcf) from 10.03 tcf estimated in 2006. Of this, about 2.2 tcf has already been produced and RIL expects the remaining 0.75 tcf could be extracted through existing wells.
"We are currently doing workovers on three shut wells," Prasad said.
Of the 18 wells on D1&D3, 10 were shut due to water and sand seeping in. The two partners are currently attempting to cut off water ingress into three wells. If successful, they will carry out this work on a similar number of wells in 2015. In between, they will install a compressor at the onshore terminal to pull gas up from wells that are over a kilometre below the sea. "Workovers are fraught with risk so we have to see the result of the current workovers," he said. On the MA field, also in KG-D6 block, RIL-BP added the MA-8 well on January 2 and plan to drill a branch well (called side tracking) later this year by re-entering a shut well.
This well will add up to 2.5 mmscmd to production. D1&D3 produce about 8.5 mmscmd and the rest of the current KG-D6 output of 13.7 mmscmd comes from MA.
