基于岩体单裂隙的CO_2地质封存中迁移速度数值试验敏感性分析  

Simulation Sensitivity Analysis of Migration Velocity of CO_2 in Geological Sequestration Based on Single Joint

作　　者：张细才[1,2] 孙瑶[3] 王震[1] 周欣[1] 王韧[1] 刘天乐[1] 

机构地区：[1]岩土钻掘与防护教育部工程中心,中国地质大学(武汉)工程学院,武汉430074 [2]广东省工程勘察院,广州510510 [3]长江三峡勘测研究院有限公司,武汉430074

出　　处：《科学技术与工程》2014年第33期147-151,共5页Science Technology and Engineering

摘　　要：研究地质封存中的CO2迁移规律对选址与设计具有重要意义。基于计算流体动力学有限元软件CFDesign,开展CO2迁移速度的敏感性分析。运用正交设计理论,分别选取岩体结构面粗糙度系数JRC(joint roughness coefficient)、岩体结构面吻合度JMC(joint match coefficient)和岩体结构面张开度e(aperture)三个因素,每种因素具有三种试验水平,以平均迁移速度为评价指标,模拟9种工况下的数值试验。结果显示:1CO2迁移速度对结构面吻合度JMC最为敏感,两者之间呈现出很强的正比关系;2CO2迁移速度对结构面张开度e的敏感性次之,两者之间同样具有较强的正比关系;3CO2迁移速度对结构面粗糙度系数JRC的敏感性最差,呈现出反比关系。Study of CO2 migration in the filed of geological sequestration has great significance to the location selection and process design. Sensitivity analysis of CO2 migration speed was conducted based on the computational fluid dynamics finite element software named CFDesign. In the basis on orthogonal design theory,Joint roughness coefficient（ JRC）,joint match coefficient（ JMC）,and aperture（ e） with 3 levels respectively were selected to perform the numerical experiments simulation,meanwhile the average migration velocity was considered as the evaluation indicators. The results showed that： 1 CO2 migration velocity is most sensitive to JMC,the velocity increased with the increasing of JMC; 2CO2 migration velocity has a medium sensitive to the e,velocity is directly proportional to the e; 3The JRC made small impact on the CO2 migration velocity,what is more,showing an inverse relationship between them.

关 键 词：岩体力学 CO2地质封存 岩体单裂隙 迁移速度 敏感性分析 

分 类 号：O368[理学—流体力学]