石油化工高等学校学报2025，Vol.38Issue(1)：33-41,9.DOI:10.12422/j.issn.1006-396X.2025.01.005
CO2地质封存盖层力学完整性数值模拟研究
Numerical Simulation Study on the Mechanical Integrity of Caprock in CO2 Geological Sequestration
摘要
Abstract
CO2 geological storage is one of the most important means to mitigate the greenhouse effect.The safety of CO2 securely stored in underground reservoirs largely depends on the mechanical integrity of the caprock.This paper establishes a coupled fluid-solid model for CO2 geological storage to study the changes in pore pressure,vertical displacement,and effective stress in the caprock during the CO2 injection process.It analyzes the effects of CO2 injection rate,caprock elastic parameters,and geostress factors on the occurrence of tensile and shear failures in the caprock.The results indicate that,at the initial stage of CO2 injection,changes in pore pressure,vertical displacement,and effective stress at the bottom of the cap near the injection well are significant but gradually stabilize thereafter.The area near the injection well is considered the most critical part of the caprock,where the risk of mechanical failure is greatest.During the CO2 injection process,the injection rate and geostress factors have the most significant impact on the occurrence of mechanical failures in the caprock.The findings of this study provide a theoretical basis for assessing the long-term stability and safety of CO2 geological storage systems.关键词
CO2地质封存/盖层/拉伸破坏/剪切破坏/数值模拟Key words
CO2 geological storage/Caprock/Tensile failure/Shear failure/Numerical simulation分类
能源科技引用本文复制引用
刘斌,黄甜甜..CO2地质封存盖层力学完整性数值模拟研究[J].石油化工高等学校学报,2025,38(1):33-41,9.基金项目
国家重点研发计划项目(2022YFE0206800) （2022YFE0206800）
黑龙江省自然科学基金联合引导项目(LH2023D004) （LH2023D004）
中国石油科技创新基金项目(2021DQ02-1103). （2021DQ02-1103）
