CNOOC Starts Production at Weizhou 5-3 Offshore Oilfield in South China Sea
CNOOC Limited (SEHK: 00883, SSE: 600938) has announced the start of production at the Weizhou 5-3 Oilfield Development Project, located in the Beibu Gulf Basin of the South China Sea. The project features a self-installing wellhead platform and will rely on nearby infrastructure to streamline operations. Full production is expected to peak at 10,000 barrels of oil equivalent per day (boepd) by 2026.
Project Details and Infrastructure:
The Weizhou 5-3 field lies in shallow waters—approximately 35 meters deep—and marks another offshore push by CNOOC as it continues to ramp up domestic production. The development plan includes ten wells: seven for production, two for water injection, and one for gas injection. The crude oil produced is classified as medium grade, suitable for regional refining needs.
The deployment of a self-installing platform underscores CNOOC’s drive for cost-effective development, especially in marginal fields near existing infrastructure. This approach is consistent with its broader offshore strategy in the South China Sea, where the company has a long-standing operational presence.
Partnership and Ownership:
CNOOC Limited holds a 51% operating stake in the project, with the remaining 49% owned by Smart Oil Investment Ltd., a partner in several regional upstream assets. The collaboration reflects CNOOC’s ongoing use of joint ventures to share risk and capital intensity in offshore developments.
Context and Industry Outlook:
This latest milestone follows a string of offshore projects CNOOC has brought online in recent years, underscoring the Chinese oil giant’s upstream focus amid a national drive for energy security. The South China Sea remains central to China’s offshore ambitions, despite overlapping territorial claims and regional tensions. Domestically, CNOOC’s new output from fields like Weizhou supports Beijing’s broader goal of reducing reliance on imported crude.
In 2023, CNOOC surpassed 650 million barrels of oil equivalent in annual production for the first time, and the company continues targeting offshore resources as shale output faces geological and cost hurdles. Developments in the Beibu Gulf are considered among the most commercially attractive due to proximity to mainland refineries and shallow-water logistics advantages.
CNOOC’s Strategic Position:
Listed in both Hong Kong and Shanghai, CNOOC Limited is one of China’s three state-owned oil majors and the country’s dominant offshore producer. The company has steadily increased its capital spending toward exploration and development in recent years, particularly in domestic waters.
With Weizhou 5-3 now online, CNOOC adds another asset to its South China Sea portfolio, reinforcing its role as a critical player in Asia’s offshore oil scene.