ONGC plans second well after KG discovery

Vol 19, PW 23 (28 Jul 16) Exploration & Production

After declaring an oil and gas discovery at its first well ONGC is planning to spud a second exploration well at shallow water KG-OSN-2009/2 once monsoon rains end in October.

An ONGC source says it will use company-owned Sagar Ratna to carry out production testing on the first well KGS092NASRI-1 spud in early December (2015) and completed by May 10, 2016 to 4000 metres TD. Another source at Oilfield Instrumentation India, which provides mud logging services, reports that Schlumberger carried out a Modular Dynamic Test at one section in early March followed by a Drill Stem Test in April.

"There was limited hydrocarbon flow," he says. "But enough to call this a discovery." Schlumberger is now preparing to activate the well by injecting nitrogen and planning to test a second object after testing the first object over April and May.

A DGH source confirms ONGC made the discovery on April 18 and submitted a detailed note later that month. According to an ONGC announcement on May 26 a seven-metre sandstone interval from 3889 to 3882 metres and a 32-metre interval from 3866 to 3834 metres at KGS092NASRI-1 flowed oil and gas at a modest 32 b/d and 820 cm/d through a 16/64-inch choke in lower cretaceous age formations.

"This discovery provides a very significant lead for future exploration in this area," said ONGC.