Delta House FPS is a first of its kind
Heralded as one of the most efficient production systems in the Gulf of Mexico, the Delta House development taps three Mississippi Canyon fields where the average water depth is around 4,500 ft (1,372 m) and reservoirs range from 12,000 to 18,500 ft (3,658 to 5,486 m).
When LLOG initially planned the development of the area, it knew that the Delta House FPS would serve as a host facility for future fields, with at least four fields tying into the platform. Designed for 25 years of continuous production, the facility initially called for seven wells to connect followed by seven additional wells as exploration activity continued.
It is considered a water independent, semisubmersible floating production system (FPS) with a production handling capacity of 100,000 b/d of oil, 240 MMcf/d of gas, and 40,000 b/d of water.
The Delta House Field Development project primarily involved the installation of a floating production system (FPS) at a water depth of 4,500ft in the Mississippi Canyon (MC) 254 field in the US Gulf of Mexico.
Partners in the project include LLOG Exploration, Blackstone Energy Partners and LLOG’s co-owners, including Ridgewood Energy, ILX, Red Willow Offshore, Calypso Exploration, and Deep Gulf Energy II. The project was approved in December 2012 and initial production from the MC 254 field was achieved in April 2015.
The FPS also hosts production from several nearby fields, including the MC 300 (Marmalard) and the MC 431 (Son of Bluto 2) fields owned by LLOG. Up to eleven wells were drilled by 2016.
The Delta House FPS has a production capacity of 80,000 barrels of oil per day (bopd) and 200 million cubic feet per day (MMcfd) of gas. The peak capacity of the facility is 100,000bopd and 240MMcfd of gas. It reached the nameplate capacity of 80,000bopd in 2016.
The total investment on the project was $2bn, the financing for which was provided by Arclight.
The semi-submersible hull of the Delta House FPS, designated OPTI-11000, is similar to that of LLOG’s OPTI-EX FPS installed at Who Dat field, but is approximately 50% larger. The Delta House FPS is capable of hosting 20 risers, enabling simultaneous production from up to nine producing fields with dual flow-lines.
The FPS, with a payload capacity of 9,300t, is designed to withstand wind and waves from a 1,000-year storm.
The construction of the hull commenced in March 2013 and took about one year to complete. The shipping of the FPS using a T-class heavy lift transport vessel of Dockwise started in March 2014. The topsides were fitted at Kiewit Offshore Services Yard in Ingleside, Texas, US.
LLOG Exploration, both operator and partial owner of the facility, commenced production in the second quarter of this year.
The breakeven price for Delta House from inception was approximately USD 27/bbl and is below USD 20/bbl going forward.
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