British energy major BP and its partners have finalised the development concept for Phase 2 of the Greater Tortue Ahmeyim (GTA) liquefied natural gas (LNG) project.
The partners will evaluate a gravity-based structure (GBS) as the basis for the GTA Phase 2 expansion project (GTA2).
The government of Mauritania and Senegal conferred the status of ‘National Project of Strategic Importance’ to the GTA project in July 2021.
The BP-operated project will have a total capacity of up to three million tons per annum.
BP’s partners in the project include Petrosen, Société Mauritanienne des Hydrocarbures (SMH), and Kosmos Energy.
The GBS platform consists of a large concrete or steel structure that is placed on the ocean floor. The structure serves as a base for the LNG processing facilities, which can include gas turbines, compressors, heat exchangers, and storage tanks.
The concept plan will also incorporate and build upon the GTA infrastructure by including new wells and subsea apparatus.
To reduce operational emissions, the partners will look into liquefying LNG using electricity.
BP and its partners have started working with contractors to take the project closer to the pre-FEED stage.
BP executive vice-president for operations and production Gordon Birrell said: “We aim to build on our strong collaboration with our partners, and the Governments of Mauritania and Senegal, to further develop a long-term, successful energy hub in West Africa.
“GTA continues to underpin our strategy to develop the most resilient hydrocarbons to help provide energy security today.”
GTA is situated 120km offshore in a water depth of 2850 metres.
Currently under development, Phase 1 of the project will deliver gas to a floating production storage and offloading (FPSO) vessel nearly 40km offshore.
The gas will be processed and liquids will be separated at the FPSO unit, before being exported to floating LNG facilities 10km offshore.
It is being estimated that Phase 1 of the project will produce approximately 2.3 million tons of LNG per annum once it commences operations.