Enterprise Oil Limited is plugging and making safe a number of suspended wells across the Pierce Field, in line with regulatory timeline and expectations. Enterprise Oil Limited is a member of the Shell Group.

The Pierce Field and associated wells are located within Blocks 23/22a and 23/27 in the Central North Sea, approximately 245km from the Scottish coastline and approximately 1km from the United Kingdom / Norway median line in water depth of circa 85m. The Field comprises two drill centres tied-back to the Haewene Brim Pierce FPSO: the Main Drill Site (MDS) located in Block 23/22 and the Satellite Drill Site (SDS) located in Block 23/27.

At this time, Enterprise Oil Limited is submitting a Decommissioning Programme seeking regulatory approval to plug and make safe six water injection wells at Pierce. Production will continue from the wider Pierce Field, and Field Decommissioning Programmes will be issued as the Field approaches Cessation of Production (CoP).

Enterprise Oil Limited submitted, for the consideration of the Secretary of State for Energy Security and Net Zero, the Draft Decommissioning Programmes for the Pierce Water Injection Wells 23/22A-A7z (A7z), 23/22-A8z (A8z), 23/22a-A13Y (A13Y), 23/27-B3 (B3), 23/27-B4 (B4) and 23/27-B4A (B4A) in accordance with the provisions of the Petroleum Act 1998. It is a requirement of the Act that interested parties be consulted on such decommissioning proposals. This Decommissioning Programme covers:

• 23/22A-A7z (A7z) well including wellhead

• 23/22-A8z (A8z) well including Christmas Tree (XT) and wellhead

• 23/22a-A13Y (A13Y) well including wellhead

• 23/27-B3 (B3) well including XT and wellhead

• 23/27-B4 (B4) well including wellhead

• 23/27-B4A (B4A) well including XT and wellhead

Public Consultation of the Pierce Water Injection Well Decommissioning Programme opened 17 October 2024 and will close on 28 November 2024. For any queries, please email SUKEP-Shell-Decommissioning-Correspondence@shell.com

• The Draft Decommissioning Programme is available for download on the OPRED website - https://www.gov.uk/guidance/oil-and-gasdecommissioning-of-offshore-installations-and-pipelines