[UK] Alma & Galia

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escveritas
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[UK] Alma & Galia

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The Alma and Galia oil fields are situated in blocks 30/25c and 30/24b respectively of the United Kingdom Continental Shelf and operated by EnQuest Heather Limited. These fields are located approximately 282km north-east of Northumberland coast (Seahouses), in water depths of ~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 Decommissioning Programmes explain the principles of the removal activities and are supported by an environmental appraisal report. The Decommissioning Programmes for the pipelines are also supported by a comparative assessment.

The Decommissioning Programmes are:
  • The EnQuest Producer floating production storage and offloading vessel (FPSO) complete with all subsea equipment, including manifolds and wellhead protection structures;
  • All pipelines associated with the Alma field including PL3006, PL3007, PL3008, PLU3009, PL3011, PL3012, and PL3013 and associated jumpers;
  • The Galia installation, a wellhead protection structure; and,
  • All associated pipelines including PL3014, PLU3015, and PL3016
escveritas
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Re: [UK] Alma & Galia

Unread post by escveritas »

EnQuest Producer Demob

1.1 Combined Decommissioning Programmes

This document contains four Decommissioning Programmes, one for each set of notices under Section 29 of the Petroleum Act 1998. The Decommissioning Programmes are:
 The EnQuest Producer floating production storage and offloading vessel (FPSO) complete with all subsea equipment, including manifolds and wellhead protection structures;
 All pipelines associated with the Alma field including PL3006, PL3007, PL3008, PLU3009, PL3011, PL3012, and PL3013 and associated jumpers;
 The Galia installation, a wellhead protection structure; and,
 All associated pipelines including PL3014, PLU3015, and PL3016.

Installations: In accordance with the Petroleum Act 1998, EnQuest Heather Limited, as operator of the Alma and Galia fields, and on behalf of the Section 29 notice holders, is applying to the Offshore Petroleum Regulator for Environment and Decommissioning (OPRED) to obtain approval for decommissioning the installations detailed in Section 2 of this document. Partner Letters of Support will be provided directly to OPRED.

Pipelines: In accordance with the Petroleum Act 1998, EnQuest Heather Limited, as operator of theAlma and Galia pipelines, and on behalf of the Section 29 notice holders, is applying to OPRED to obtain approval for decommissioning the pipelines detailed in Section 2 of this document. Partner Letters of Support will be provided directly to OPRED.

In conjunction with public, stakeholder and regulatory consultation, the Decommissioning Programmes are submitted in compliance with national and international regulations and OPRED guidance notes. The schedule outlined in this document is for a seven-year period with FPSO sailaway due to begin sometime Q3 2020.

1.2 Introduction

The Alma and Galia oil fields are situated in blocks 30/25c and 30/24b respectively of the United Kingdom Continental Shelf and operated by EnQuest Heather Limited. These fields are located approximately 282km north-east of Northumberland coast (Seahouses), in water depths of ~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 Decommissioning Programmes explain the principles of the removal activities and are supported by an environmental appraisal report. The Decommissioning Programmes for the pipelines are also supported by a comparative assessment.
escveritas
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Re: [UK] Alma & Galia

Unread post by escveritas »

The EnQuest Producer is a Floating Production, Storage and Offloading facility (“FPSO”) originally called the Uisge Gorm. It is located 320 km south east of Aberdeen in Licence blocks 30/24c and 30/25c, in 80m of water.

The EnQuest Producer was put on location in 2015. It processes production from the Alma and Galia fields. The equity holders in both of these fields are EnQuest (65%) and KUFPEC (35%). The living quarters have a maximum POB of 97.

The FPSO has an open deck process area which includes oil separation, low-pressure gas compression, produced water and seawater injection, utility systems, boiler modules and steam turbine enclosures. Storage capacity on the FPSO is 625,000bbl.

Stabilised oil is exported via tanker. Produced gas is compressed and used for fuel. Produced water is cleaned and discharged overboard to the sea.

Outline details of Primary separation processing facilities:

There are two first stage separators that receive fluids from the two 10” flowlines. Oil flows from the separators into the second stage separator via an interstage heater. Oil from the second stage separator is routed to an electrostatic dehydrator. The crude is then cooled and pumped into the crude cargo tanks. Produced water from the first stage separators is processed through hydrocyclones, and degassed. Produced water is either discharged overboard or pumped to a slops tank for further separation before being discharged overboard. High pressure gas from the first stage separators is cooled before flowing into the HP gas knockout drum. The gas is then superheated and used in the boilers as fuel gas. Surplus gas is routed to the flare. A compressor compresses low pressure gas from the second stage separator to provide additional high pressure gas for boiler fuel.

Outline details of gas treatment facilities:

Gas is cooled, stripped and then superheated before introduction to the boiler as fuel. Excess gas is flared.
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