吃碳吐油 变“废”为宝 探访我国首个实现年注碳百万吨的油田

Core Viewpoint - The Xinjiang Oilfield has achieved a significant milestone by becoming the first oilfield in China to inject over 1 million tons of carbon dioxide annually by 2025, playing a crucial role in the country's dual carbon goals and the transformation of traditional industries through green low-carbon technologies [4][12]. Group 1: CO2 Injection Technology - The CO2 injection method enhances oil recovery by increasing pressure and reducing viscosity, allowing for the extraction of oil trapped in rock formations [5][7]. - CO2 injection can improve oil recovery rates by 10% to 20% compared to water injection, potentially raising total recovery rates to between 40% and 60% [7]. - The Xinjiang Oilfield has been exploring CO2 capture, utilization, and storage (CCUS) technologies for over 20 years, with successful pilot projects demonstrating significant increases in oil production [8][10]. Group 2: Environmental Impact and Carbon Management - The CO2 used for oil extraction is sourced from industrial emissions in the surrounding areas, ensuring a high purity level of over 99% after processing [11][12]. - Approximately 80% of the injected CO2 is permanently stored underground, while the remaining 20% is recycled back into the system, contributing to a circular economy [12]. - The current daily CO2 injection rate has reached over 4,800 tons, with a cumulative injection surpassing 200,000 tons, equating to the carbon absorption of 18 million mature trees annually [12]. Group 3: Challenges and Future Directions - The application of CCUS technology is still in its early stages, facing challenges such as carbon source supply and complex geological structures that hinder accurate modeling [10]. - The Xinjiang Oilfield is committed to overcoming these challenges by enhancing collaboration with carbon source providers and improving geological research to better understand underground reservoirs [10][12]. - The ongoing advancements in CCUS technology are expected to facilitate the large-scale application of carbon management strategies across various oilfield types in Xinjiang [10].