Zhong Guo Xin Wen Wang·2025-12-14 03:38Core Insights - China National Offshore Oil Corporation (CNOOC) announced the full production launch of the second development phase of the Liuhua oil field, marking a significant advancement in deepwater complex reservoir development in China [1][3] Group 1: Project Overview - The Liuhua oil field, located in the Pearl River Mouth Basin, is China's first deepwater oil field and has the largest proven geological reserves of reef limestone oil [1][3] - The project consists of Liuhua 11-1 and 4-1 oil fields, with an average water depth of approximately 305 meters and a design capacity of 32 production wells [3] - Since the first batch of wells was put into operation in September of the previous year, daily crude oil production has reached 3,900 tons, setting a new production capacity record [3] Group 2: Technical Achievements - Key to the successful secondary development of the Liuhua oil field is the control of water and stabilization of oil, which has led to a significant reduction in the comprehensive water cut of the production wells compared to design expectations [3] - CNOOC has developed a technical system for stabilizing oil and controlling water in offshore reef limestone, which has greatly improved the recoverable reserves and recovery rates, extending the field's lifespan by 30 years [3] Group 3: Economic Viability - The current operational performance of the Liuhua oil field's secondary development project demonstrates the reliability of the offshore reef limestone oil field stabilization technology and the economic effectiveness of the "deepwater jacket platform + cylindrical FPSO" development model [3] - This project provides a feasible solution for the large-scale and efficient development of similar deepwater oil and gas resources during China's 14th Five-Year Plan period [3]