Drilling & Completion

Serica pursuing more interventions in North Sea Triton, Bruce areas

Dec. 6, 2023

The first rig-based well intervention campaign for 10 years on the Guillemot West and North West fields in the UK North Sea has been completed, Serica Energy said in an operations update.

Related To: Serica Energy

Guillemot West was developed with six horizontal wells.

Offshore staff

LONDON — The first rig-based well intervention campaign for 10 years on the Guillemot West and North West fields in the UK North Sea has been completed, Serica Energy said in an operations update.

As a result, incremental oil production from one well has risen by about 1,500 bbl/d, while production in another is now 12 MMcf/d higher. Both wells had previously been shut-in for lengthy periods.

Planning is now underway for another four-well drilling campaign in the Triton Area, scheduled for 2024 and early 2025, using the semisub COSLInnovator. First up will be a sidetrack of the B1z well on the Bittern Field, likely to spud in mid-Q1 2024 and taking around 90 days to complete.

Others on the agenda are the GE-05 well on Gannet E, the EC well on Guillemot North West and the EV-02 well on Evelyn.

Serica has also exercised an option to use the rig for a fifth well, potentially for development of the Belinda Field. The company submitted a draft field development pan to the North Sea Transition Authority (NSTA) in September.

The Belinda oil and gas discovery is located in Block 21/30f about 6 km southeast of the Triton FPSO.

Another recent program involved work on the host Triton FPSO to reinstate water injection on Bittern, with a restart expected early in 2024.

At Serica’s Bruce complex in the UK northern North Sea, the company has been conducting its second light well intervention vessel (LWIV) campaign on the Bruce Field. This has entailed reentering three wells to identify areas of scale buildup, perform water shut-offs and perforate target intervals.

To date (work is still ongoing on one well), overall production from the reentered wells has risen by about 2,500 boe/d.

The company has now intervened on five of the subsea wells that comprise the Western Area Development, and since succeeding bp as operator, Serica has also reentered 14 Bruce platform wells. It now plans a third LWIV campaign in 2024 involving work on wells at Bruce and the satellite Keith Field, and is considering future interventions on more Bruce platform wells.

Finally, the company is executing vessel-based final abandonments of four exploration and appraisal wells on Keith and this year’s North Eigg exploration well, which it expects to complete this month, in compliance with the NSTA’s initiative to reduce the number of suspended inactive wells in the UK North Sea.

License P2448, which contains the Mansell discovery, expires next March. Serica has requested an extension to the license term, mainly to determine whether there is a viable long-term export route for production from a future development.

12.06.2023