Kerr-McGee Corp. has approved the development of its 100%-owned Constitution field using a truss spar facility. Located in the Gulf of Mexico in 5,000 ft of water at Green Canyon blocks 679 and 680, the Constitution field has estimated proven and probable resources of 110 MMboe.
"This spar will create our sixth deepwater hub, enabling us to further capitalize on our extensive acreage inventory in the Gulf of Mexico," Luke R. Corbett, Kerr-McGee chairman and CEO, said.
The company confirmed the Constitution field with 11 penetrations into oil-bearing sands in seven hydrocarbon-bearing reservoirs. These reservoirs have a porosity of 28%, permeability of 800 millidarcies, and oil gravity of 32° API. The Pliocene reservoirs are from 12,500 ft to 15,000 ft deep.
Kerr-McGee will develop the Constitution field with a truss spar similar to the company's previous three truss spars. Like the Nansen, Boomvang, and Gunnison spars, the Constitution spar will process 40,000 b/d and 200 MMcf/d. The hull will be 98 ft in diameter and 550 ft long. Technip will build the truss spar at its Pori, Finland yard, where the hulls for Kerr-McGee's Neptune, Nansen, Boomvang, and Gunnison spars were fabricated.
The development plan for the Constitution field includes five dry trees and one subsea tieback. Well bores from previously drilled appraisal wells will be used as part of the final development plan. First production is expected by mid-2006, with peak production to reach 40,000 b/d and 75 MMcf/d in 2007.