ONGC board earlier this month approved submission of the draft FDP for one set of oil and gas discoveries made in the eastern offshore Block KG-DWN-98/2 or KG-D5, which sits next to Reliance Industries' flagging KG-D6 area.
"We are looking at producing 77,000 barrels per day of oil and 14 million standard cubic meters per day of gas from the first set of discoveries by 2018-19," a senior company official said.
ONGC has divided 12 oil and gas discoveries in KG-D5 and gas discovery in an adjacent G-4 block in the Bay of Bengal into three clusters to quickly bring them to production.
Cluster-1 comprises D&E discoveries as also G-4 find in the neighbouring area which ONGC estimates can produce 14.5 mmscmd of gas for 15 years.
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Cluster-2A mainly comprises oil finds of A2, P1, M3, M1 and G-2-2 in NDA which can produce 77,000 barrels per day (3.75 million tonnes per annum).
The official said ONGC is presently focused on developing Cluster-2A and 2B and a draft FDP for these has been submitted to the Directorate General of Hydrocarbons (DGH).
"There are some issues regarding conformity tests for discoveries in Cluster-1. So until they are sorted out, a FDP cannot be prepared for them," he said.
The draft FDP for Cluster-2A and 2B does not detail the investment that would be required to bring the discoveries to production, he said.
If discoveries in Cluster-1 get approved, the total investment will climb to USD 8.843 billion, he said.
Cluster-3 is the UD-1 gas discovery in SDA. "UD-1 lies in water depth of 2,400-3,200 meters and there is no technology to produce from such depths. And so Cluster-3 is presently not being pursued for development," he said.
While gas from the block will be evacuated to Odalarevu onshore terminal in Andhra Pradesh through 20-inch, 35.5 km sub-sea pipeline, oil is proposed to be taken on to an FPSO (Floating Production Storage and Offloading) anchored in high-sea. Oil from FPSO will then be transfered to tankers for transportation to refineries.