Xin Hua Wang·2025-08-23 02:21Core Insights - China National Petroleum Corporation's Changqing Oilfield has achieved a historic milestone by storing over 1 million tons of carbon dioxide, marking a significant advancement in CCUS technology [1][2] - The implementation of CO2 injection as a medium for oil extraction has improved oil recovery efficiency by 25% compared to traditional water-based methods [1] - Changqing Oilfield has developed a unique "Changqing Model" for CCUS, addressing 15 key challenges across three major areas: reservoir, injection and production, and surface engineering [1] CCUS Industrialization Efforts - During the 14th Five-Year Plan, Changqing Oilfield is deploying three large-scale CCUS industrial projects in Shaanxi, Gansu, and Ningxia provinces, each with a capacity of 1 million tons [2] - The CCUS-EOR trial in the Shaanxi Jiyuan Oilfield has expanded to 11 injection and 47 production wells, achieving an injection capacity of 100,000 tons per year [2] - The Ningxia oil region has established a collaborative model involving government, oil and gas production companies, and large coal chemical enterprises, with a current injection capacity of 400,000 tons per year [2] Environmental Impact - The 1 million tons of carbon stored is equivalent to planting over 54 million trees, highlighting the ecological benefits of the CCUS initiatives [2] - With the rollout of three million-ton projects, Changqing Oilfield anticipates further breakthroughs in carbon storage over the next five years [2] - The company aims to refine project construction around three technical models: tight oil area drive, low permeability gravity-assisted drive, and shale oil energy supplementation, contributing to China's dual carbon goals [2]