First Falklands well proves oil in Zebedee

Offshore staff

LONDON – The semisubmersible Eirik Raude has discovered oil and gas in the Zebedee structure in the offshore North Falkland basin.

According to Premier Oil, well 14/15b-5 in license PL004b intersected 81 ft (24.6 m) of net oil-bearing reservoir and 55 ft (16.7 m) of net gas-bearing reservoir.

Along the way it penetrated multiple targets in the Cretaceous F2 and F3 formations with a total hydrocarbon net pay of 136 ft (41 m).

Most of the pay is within two F2 Hector and Zebedee sands. No oil-water contact was observed in Zebedee.

The reservoir at both these intervals is of good quality and results are in line with prognosis. Good oil shows were recorded at the deeper F3 targets but at this location the sands are not well developed.

Partner Falkland Oil & Gas (FOGL) said a 3-m (9.8-ft) sand interval below the Zebedee sand, containing good oil shows, could be the southerly extension of the Sea Lion oil field Main sand.

Pressure measurements within the Zebedee interval plot are on the same gradient as those observed in the Sea Lion oil leg, FOGL added, and it is therefore likely that the Zebedee reservoir is in pressure communication with, and has the same oil-water contact, as Sea Lion.

After P&A’ing the well, the rig will drill the Isobel Deep well on the Elaine/Isobel fan complex in the southern part of the North Falkland basin, potentially the highest-impact prospect targeted by the six-well campaign, according to Premier. Results should follow later this month.


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