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%.