CO2封存储层岩石的破裂过程与渗透作用机制研究

Carbon dioxide (CO2) geological storage (CCS) is an emerging technology for dealing with climate change and reducing greenhouse gas emissions. The signing and entry into force of the Paris Agreement made this technology enter a critical period of rapid development. General Secretary Xi Jinping has clearly made a solemn commitment to China's CO2 emission peak around 2030. The contradiction between the actual demand for CO2 geological storage and site security precautions has become increasingly prominent. This project aims to reveal the temporal and spatial evolution of the fracture process and the infiltration change of reservoir rocks under conditions of CO2 geological storage through field geological surveys, laboratory experiments, theoretical analysis and numerical simulations. By establishing the spatiotemporal model of rock failure process and fluid infiltration evolution, both the evolution mechanism of pore controlled seepage and fissure controlled seepage process and brittle-ductile fracture transition mechanism are clarified as the goal. The whole research provides theoretical and technical support for the safe and secure operation of CO2 geological storage projects. This project has important strategic significance and application value for ensuring China's energy security and promoting China's low-carbon economic development.

二氧化碳（CO2）地质封存（CCS）是应对气候变化、减少温室气体排放的新兴技术。《巴黎协定》的生效使得该技术进入了快速发展的关键时期，习近平总书记已明确作出了我国2030年前CO2排放达峰的庄严承诺。CO2地质封存现实需求与场地安全保障矛盾愈发凸显。本项目旨在通过野外地质调查、室内试验、理论分析和数值模拟，揭示CO2地质封存条件下储层岩石的破裂过程与渗透变化时空演化规律，研发CO2渗流-破坏高精度室内实验监测技术、计算分析方法和数值模拟软件，建立岩石破裂过程与流体渗透演化的时空模型，阐明“孔隙控制”渗流和“裂隙控制”渗流演化过程及脆性-延性破裂作用机制，为CO2地质封存项目的安全运行提供理论和技术支撑。本项目对保障我国能源安全和推动我国低碳经济发展具有重要的战略意义和应用价值。

二氧化碳（CO2）地质封存（CCS）是应对气候变化、减少温室气体排放的新兴技术，是实现习近平主席提出的中国3060双碳目标的重要保障。随着CCS商业化和规模化，CO2地质封存现实需求与场地安全保障矛盾愈发凸显。本项目通过一系列完整岩心或预制裂隙的岩心室内实验、理论分析和数值模拟，研发了多种CO2渗流-破坏高精度室内实验监测技术、计算分析方法和数值模拟代码，分别基于有限元/离散元方法，建立了岩石破裂过程与流体渗透演化的时空模型，阐明了“孔隙控制”渗流和“裂隙控制”渗流演化过程及脆性-延性破裂作用机制，揭示了CO2地质封存条件下储层岩石的破裂过程与渗透变化时空演化规律，为CO2地质封存项目的安全运行提供理论和技术支撑。本项目对保障我国能源安全和推动我国3060双碳目标的实现具有重要的战略意义和应用价值。