Lucius Deepwater Oil and Gas Project, Gulf of Mexico, United States of America
The Lucius oil field is located in the Keathley Canyon block in the Gulf of Mexico. Anadarko Petroleum operates the field with a 35% working interest.
Co-owners include Plains Exploration & Production Company (23.3%), Exxon Mobil Corporation (15%), Apache Deepwater (11.7%), Petrobras (9.6%) and Eni Petroleum (5.4%).
Lucius is a deepwater field containing high quality crude oil and associated gas. First oil from the field is expected in 2014. The field development is estimated to cost approximately $2bn.
Lucius oil field location
The Lucius structure is spread over parts of Keathley Canyon blocks 874, 875, 918 and 919, with a three way closure against a salt barrier.
Anadarko, Exxon Mobil and other co-owners of the field entered into an unitisation agreement in July 2011 to develop the Lucius field. The agreement integrates the portions of Keathley Canyon blocks 874, 875, 918, and 919.
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The Lucius field was discovered in December 2009 using the Ensco 8500 semi-submersible rig. The discovery well was drilled to a depth of 20,000ft in about 7,100ft of water.
It encountered 200ft of net pay in subsalt Pilocene and Miocene sands of Keathley Canyon block 875. High quality crude oil of 29º API was encountered during the discovery drilling.
An up-dip sidetrack appraisal well was drilled 3,200ft south of the discovery well in the next month to confirm the results. The appraisal well encountered 600ft of net pay with high quality oil and associated gas-condensate. It was drilled to about 20,600ft depth in 7,100ft of water.
An extended well test was performed at the discovery to confirm the flow rates and reservoir characteristics.
Lucius contains thick reservoir sands with good porosity and permeability. It is estimated to contain reserves of more than 300 million barrels of oil equivalent.
The development of the Lucius deepwater project was approved by Anadarko and partners in December 2011. It is expected to involve about six subsea production wells tied back to a spar. Active drilling is planned to begin in 2012.
Lucius floating production facility
Lucius will produce oil and gas through a truss spar floating production facility. The spar will be 605ft long and 110ft in diameter. It will be installed in 7,100ft of water. It will have a nameplate capacity of 80,000 barrels of oil a day (BOPD) and 450 million cubic feet of gas a day (mcf/d). The hull will weigh approximately 23,000t. The topsides will have an initial payload of 15,000t.
Pipeline for exportation of Lucius oil and contracts awarded
Oil produced by the Lucius spar will be exported to the South Marsh Island (SMI) Area Block 205 Platform by an 18-inch diameter pipeline. The pipeline was laid in three sections by Cronus Technology.
The south section is a 71-mile long, newly laid pipe in 7,025ft to 5,300ft of water depth. It has two inline wye assemblies to enable future tie-ins.
The mid section is an existing 48 miles long Phoenix pipeline in 5,300ft to 2,395ft of water depth. The north section is 26 miles long, newly laid in water depth ranging between 2,395ft and 445ft.
The engineering, procurement and construction contract for the topsides of the deepwater spar was awarded to Mustang in December 2011. Mustang expects to complete the detailed engineering in the third quarter of 2012. The conceptual and front end engineering design has been completed.
A lump sum contract was awarded to Technip to engineer, construct and transport the Lucius spar hull. The hull is being built at Technip's yard in Pori, Finland.
The overall project management is being provided by Technip's operating centre in Houston, Texas. Technip has, in the past, built six similar spars - Neptune, Nansen, Boomvang, Gunnison, Red Hawk and Constitution - for Anadarko.
The co-venturers in the Lucius project signed an agreement with the partners in Hadrian South field in 2011. The agreement allows for processing of natural gas produced from the Hadrian South through the Lucius processing facility. The Hadrian South co-owners will pay a production-handling fee and reimburse the cost of facility upgrades, if any, to the Lucius co-venturers.