More wells needed to de-risk North Sea Serenity, Liberator West oil

i3 Energy has modified its Phase 1 development plan for the Liberator field in the UK central North Sea following wireline logging operations on the recent 13/23c-11, drilled by the semisubmersible Borgland Dolphin.

The semisub Borgland Dolphin drilled well 13/23c-11 on the Liberator field in the UK central North Sea.
The semisub Borgland Dolphin drilled well 13/23c-11 on the Liberator field in the UK central North Sea.
(Courtesy Dolphin Drilling)

Offshore staff

LONDON – i3 Energy has modified its Phase 1 development plan for the Liberator field in the UK central North Sea following wireline logging operations on the recent 13/23c-11, drilled by the semisubmersible Borgland Dolphin.

The well corroborated i3’s mapping of the Liberator field, confirming a 200-ft (61-m) plus sand body, an oil water contact (OWC) matching expectations and a residual oil column below the OWC.

Collectively these mitigate the risk of oil migration westward to fill the A3 and A4 culminations and the Minos High structure in Liberator West, which the company believes could hold up to 400 MMbbl of in-place oil.

However, the oil column in 13/23c-11 is thinner than hoped, so a low-cost, single-well development will likely follow, tied in to existing offshore infrastructure.

Analysis of the nearby 13/23c-10 Serenity discovery well suggest 197 MMbbl in-place, with potential connection to the Tain oil field, currently undergoing development planning.

Next steps will be a planned multi-well appraisal campaign next summer focused on Serenity and the Liberator West area, the aim being to de-risk much of the combined potential of 600 MMbbl.

12/03/2019

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