CNOOC sees Weizhou 6-12 peak this year

By OGJ editors

CNOOC Ltd. expects production from Weizhou 6-12 oil field in the Beibu Gulf offshore China to reach its peak rate from 10 wells this year.

Production started in March from two development wells drilled from a wellhead platform in about 29.2 m of water (OGJ Online, Mar. 27, 2013).

CNOOC, operator, hasn’t reported production rates.

In March, Horizon Oil Ltd., Woolloomooloo, Australia, said it expected peak output net to its 26.95% interest to exceed an earlier reported 3,500-4,000 b/d, indicating a gross rate of more than 14,800 b/d.

Horizon said an independent assessment after the drilling of three appraisal wells in 2012 increased estimates of Weizhou 6-12 proved oil reserves by 24% to 22.9 million bbl (gross) and proved plus probable reserves by 18% to 28.3 million bbl.

The Weizhou 6-12 development area encompasses a northern and southern structure with a prospect called Sliver on the northern edge of the southern structure. Horizon said reserves additions came from new pools discovered in the northern structure and the Sliver prospect.

The Weizhou 6-12 wellhead platform is northeast of and connected by pipelines to a processing platform recently added to three platforms on Weizhou 12-1 oil and gas field.

Development drilling is in progress from a wellhead platform on Weizhou 12-8 field, which is southeast of the new processing platform and also connected by pipelines to it.

Other interests in the Beibu Gulf Development Project are CNOOC 51%, Roc Oil (China) Co. 19.6%, and Oil Australia Pty Ltd. (Majuko Corp.) 2.45%.


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