热-流耦合与热-流-固耦合作用下的水气交替及间歇注入对咸水层CO2溶解封存的影响
Impact of Water Alternating Gas and Intermittent Injection on CO2 Dissolution During CO2 Sequestration in Saline Aquifers Considering Thermal-Hydraulic Coupling and Thermal-Hydraulic-Mechanical Coupling Effects
张杰城 1杜鑫芳 2赫文豪 3张来斌1
作者信息
- 1. 中国石油大学(北京)安全与海洋工程学院,北京 102249;油气生产安全与应急技术应急管理部重点实验室,北京 102249
- 2. 中国石油集团渤海钻探井下作业分公司,任丘 062550
- 3. 中国石油大学(北京)油气光学探测技术北京市重点实验室,北京 102249
- 折叠
摘要
基于TOUGH+软件架构,结合更为准确的物理性质计算模型,建立了适用于咸水层CO2封存的热-流耦合模拟方法,并使用固定应力分割迭代耦合模型将其与RGMS软件耦合,改进了热-流-固双向耦合模拟方法,建立了准确性更高的热-流-固迭代耦合模拟方法.基于鄂尔多斯盆地地质特征构建的地质模型,使用热-流与热-流-固迭代耦合方法模拟咸水层CO2溶解封存过程,研究了水气交替及间歇注入方案对CO2溶解量、孔隙压力和地层形变的影响.结果表明:热-流-固迭代耦合模拟能帮助设计更加合理的注入方案;仅用水气交替注入方式可提高CO2溶解量;间歇注入有助于孔隙压力与地层形变恢复.研究结果可为咸水层CO2溶解封存提供理论指导.
Abstract
Based on TOUGH+and a more accurate physical property calculation model,a thermal-hydraulic cou-pling simulation method suitable for CO2 sequestration in saline aquifers is established.The method was further cou-pled with RGMS using the fixed-stress split iteration model,improved from the fixed-stress split two-way model,to obtain a more accurate thermal-hydraulic-mechanical iteratively coupling simulation method.Based on the geo-logical characteristics of the Ordos Basin,a geological model is constructed,and the thermal-hydraulic and thermal-hydraulic-mechanical coupling simulation methods mentioned above are used to simulate the process of CO2 dissolu-tion during CO2 sequestration in saline aquifers.The impacts of water alternating gas injection and intermittent injec-tion schemes on CO2 dissolution,pore pressure,and formation deformation are investigated.The following results are found:the thermal-hydraulic-mechanical iteratively coupling model can better assist in designing more reason-able injection schemes;only water alternating gas injection can enhance CO2 dissolution;intermittent injection con-tributes to the recovery of pore pressure and formation deformation.The results can provide theoretical guidance for the CO2 sequestration in saline aquifers by CO2 dissolution.
关键词
热-流-固耦合作用/热-流耦合作用/咸水层CO2溶解封存/水气交替注入/间歇注入Key words
thermal-hydraulic-mechanical coupling/thermal-hydraulic coupling/CO2 dissolution during CO2 se-questration in saline aquifer/water alternating gas injection/intermittent injection引用本文复制引用
基金项目
国家重点研发计划项目(2022YFC2806401)
国家自然科学基金项目(52301354)
中国石油大学(北京)科研基金项目(2462023SZBH004)
中国博士后科学基金项目(2023M743875)
出版年
2024
NETL
NSTL
万方数据