ExxonMobil’s post-drill evaluation of its Dunquin North wildcat off south-west Ireland has found that significant resources were in place before the reservoir was breached.
The initial results of the deep-water probe at FEL 3/14 proved disappointing last July when it emerged the reservoir had proved water-bearing together with oil shows.
Previously undisclosed post-drill analysis data has attributed pre-breach hydrocarbons initially in place of 1.2 billion barrels of oil equivalent and residual hydrocarbons in place of 600 million boe, junior partner Providence Resources said.
The US supermajor estimates that the nearby Dunquin South prospect could hold recoverable hydrocarbons in place of 1.389 billion boe, the explorer added.
Technical director John O’Sullivan told Upstream that the resource figures “demonstrate whole-scale oil generation, expulsion and entrapment has occurred in the southern Porcupine basin".
He added that notwithstanding the subsequent breach at Dunquin North, “it’s a big basin so a potentially big oil province on the door-step of Europe for the future”.
The ExxonMobil-led venture is still considering the prospect of drilling Dunquin South, where Eni and Repsol are also partners along with Atlantic Petroleum and Sosina Exploration on smaller stakes.