EnQuest files decommissioning programs for North Sea fields

UK-based EnQuest has submitted its draft decommissioning programs for the Alma & Galia fields located in the North Sea to the UK authorities.

Source: EnQuest

EnQuest submitted decommissioning programs for the the EnQuest Producer FPSO, complete with all subsea equipment, including manifolds and wellhead protection structures, and all pipelines associated with the Alma field including PL3006, PL3007, PL3008, PLU3009, PL3011, PL3012, and PL3013, and associated jumpers.

The company also submitted decommissioning programs for the Galia installation, a wellhead protection structure, and all associated pipelines including PL3014, PLU3015, and PL3016.

The Alma and Galia oil fields are located in blocks 30/25c and 30/24b respectively of the United Kingdom Continental Shelf and operated by EnQuest. These fields are located approximately 282km north-east of Northumberland coast (Seahouses), in water depths of about 77m.

The Alma and Galia fields were developed as a single joint development and came onstream in late 2015. They produce via subsea wells tied-back to the FPSO vessel via one central hub for all fields. Alma has six production wells and one water injector, while Galia produces via one well. The cessation of production documentation for the Alma & Galia fields is currently under consideration by the Oil and Gas Authority.

The plan entails complete removal of the EnQuest Producer FPSO for recycling. The mooring chains will be cut locally to the mooring pile and piles below the seabed.

It also entails complete removal of the Alma manifold with the piles cut below the seabed and complete removal of 8 WHPS for recycling.

All pipelines will be cleaned and flushed, and together with the riser bases will be fully recovered to shore.

The plan also includes complete removal of associated concrete mattresses and grout bags. Deposited rock will remain in situ. Wells will be plugged and abandoned.

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