CNOOC Ltd, a major player in China’s offshore energy sector, has recently marked an important breakthrough in exploring Paleozoic-era buried hills in the Beibu Gulf basin of the South China Sea. In its Weizhou 10-5 prospect—situated in relatively shallow waters at 37 metres deep—the company encountered promising geological indicators.
During drilling at the WZ10-5-1Sa well, which reached approximately 4840 metres in depth, a substantial 283-metre section was found to contain oil and gas reserves. Early tests reported production rates of about 13.2 million cubic feet of natural gas and roughly 800 barrels of crude oil per day, underscoring a significant advancement for the area’s natural gas prospects.
Xu Changgui, the chief geologist at CNOOC, highlighted that this discovery not only opens up extensive potential within the Beibu Gulf basin but also provides valuable insights for similar offshore projects in China. Meanwhile, chief executive Zhou Xinhuai reiterated the company’s commitment to expanding its resource portfolio, noting that recent years have seen several notable oil and gas finds across various offshore buried hill formations.