Reliance Industries and its partner BP plc of UK have invested over Rs 4,500 crore in the flagging eastern offshore KG-D6 block to maintain gas output at current level despite the steep natural decline that has set in in the seven-year old fields. RIL-BP are currently producing from Dhirubhai-1 and 3 gas field and MA oil and gas field, three of the over one-and-half dozen discoveries made in the Bay of Bengal Block KG-DWN-98/3 or KG-D6. The fields, which began gas production in April 2009, hit a peak output of 69.43 million standard cubic meters per day in March 2010 before water and sand ingress shut down well after well. The fields are on steep natural decline and RIL-BP have have spent over Rs 4,500 crore arrest the decline and continue to increase the ultimate recovery of gas, sources said. The block is currently producing 8.7 mmscmd. Currently, RIL-BP are in the process of sidetracking (drilling) two of their existing wells and drilling away from the water to increase recovery of gas.