Lianzi development set offshore Congo (Brazzaville), Angola

By OGJ editors

Chevron Overseas Congo Ltd. will develop deepwater Lianzi oil field in the shared zone offshore Congo (Brazzaville) and Angola.

The company will install a subsea production system 65 miles offshore in 3,000 ft of water tied back to the Benguela Belize Lobito Tomboco (BBLT) platform in Angolan waters. Chevron says the 27-mile long electrically heated flowline will be the first of its kind installed in so much water.

It expects production to start in 2015 and reach a peak rate of 46,000 b/d.

Chevron and partners reported in 2004 that the Lianzi-1 exploration well encountered two oil-bearing reservoirs. A drillstem test of one interval flowed more than 5,000 b/d of 40° gravity oil through a 40/64-in. choke (OGJ Online, Oct. 12, 2004).

Chevron Overseas Congo operates Lianzi field with a 31.25% interest. Partners are Total, 36.75%; Eni and Songangol, 10% each; Republic of Congo National Oil Co., 7.5%; and GALP, 4.5%.

The BBLT platform is a compliant tower installed in 1,300 ft of water about on Angola Block 14 about 50 miles offshore handling production from Benguela, Belize, Lobito, and Tomboco oil fields (OGJ Online, June 27, 2006). Chevron subsidiary Cabinda Gulf Oil Co. Ltd. operates the project.

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