CNOOC announced on 29 June 2020 that the company has made a significant oil and gas discovery in the Pearl River Mouth Basin, South China Sea. HZ 26-6-1, drilled in the Huizhou Sag with an average water depth of 113 m, tested 2,020 b/d of oil and 15.36 MMcf/d of gas respectively. It is expected to become the first mid-to-large sized condensate oil and gas field in the shallow water area of the basin.  The successful of Huizhou 26-6 oil and gas discovery is the first time that CNOOC achieves commercial and highly productive oil and gas flow in buried hill exploration in Eastern South China Sea, marking a significant exploration breakthrough in Paleogene and buried hill complex oil and gas reservoir in the Pearl River Mouth Basin, and further proving the huge exploration potential in this area.  CNOOC spudded HZ 26-1-1, new-field wildcat (NFW), in the Pearl River Month Basin of the South China Sea in early January 2020. âHYSY 943â J/U is used for the drilling operation. The well completed at a TD of 4,276 m and encountered oil and gas pay zones with a total thickness of 422.2 m. After HZ 26-6-1 discovery, a few appraisal wells have been drilled and completed with success.   A few wells have been drilled in this area, HZ 26-2-1 and HZ 26-3-1 tested oil in the Miocene Zhujiang Formation but the size of the discovery is uncommercial. HZ 26-2E-1 and HZ 26-8-1 completed only with shows.   Huizhou Sag is an oil-rich generated source kitchen in the Pearl River Mouth Basin, there are several existing producing fields with reservoirs in the Tertiary clastic rock in the area, such as Huizhou 26-1, 21-1, 32-2, 32-3, Huizhou 19-1/2/3, and Huizhou 25-3/4/8 fields cluster etc., those fields together have already produced a cumulative of over 400 million bbls of oil as of 2018.
China (Pearl River Mouth B.) Huizhou 26-6 (Pr) 1 op. by CNOOC LTD (100%) in Xijiang 10 block, WD = 100 m, significant oil and gas discovery in the South China Sea, WD=113 m, tested 2,020 b/d of oil and 15.36 MMscf/d of gas respectively. It is expected to become the first mid-to-large sized condensate oil and gas field in the shallow water area of the basin. 