CO_2地质储存中构造地层圈闭/水动力储存的研究  

Study on Construct Stratigraphic Traps/hydrodynamic Traps During CO_2 Geologicalsequestration in Deep Saline Aquifers

作　　者：林广宇[1,2] 万玉玉[1,2] 

机构地区：[1]吉林大学环境与资源学院,长春130026 [2]地下水资源与环境教育部重点实验室,长春130026

出　　处：《中国农村水利水电》2013年第8期31-35,38,共6页China Rural Water and Hydropower

基　　金：国家潜在油气资源(油页岩勘探开发利用)产学研用合作创新研究项目子课题<油页岩开发利用地下环境影响与保护>(OSR-01-04)

摘　　要：为了研究在深部咸水层中,构造地层圈闭/水动力储存作用下CO2储存特征及迁移规律,此次研究以鄂尔多斯某CO2地质储存示范场地的深部咸水层为研究对象,利用测井数据,运用TOUGH2数值模拟软件建立模型,分析了深部咸水层中CO2注入速率变化、压力分布、CO2饱和度分布、CO2质量分数分布等方面的特征,研究结果表明:①在定压力注入条件下,随着注入时间的延长CO2的注入速率逐渐减小最后趋于稳定。②溶解态CO2所占总储量比例随时间增加而增加,安全性随之增高,但超临界态CO2依然是主要的储存形式。③CO2注入后以注入井为中心形成CO2晕,并随着深度增加范围减小,由内向外饱和度逐渐降低。In order to study the storage characteristics and the migration of CO2under construct stratigraphic traps/hydrodynamic traps in deep saline aquifers,a demonstration site of CO2geological storage in Ordos,which was characterized as a series of deep saline aquifers,was taken as target.By using well data and TOUGH2numerical simulation software,a model was established to investigate CO2injection rate,pressure distribution,CO2saturation and CO2mass fraction.Combined these results,conclusions are as follows：a.Under the set pressure injection,CO2injection rate was gradually reduced and finally stabilized over time;b.The ratio of dissolved CO2increased along with time,which reduced the risk of leakage.Meanwhile,supercritical CO2was still the main storage form;c.A halo was formed around the well after the injection of CO2and its range shrank along the depth,when the CO2saturation decreased from the inside out of it.

关 键 词：CO2地质储存 构造地层圈闭 水动力储存 深部咸水层 数值模拟 

分 类 号：P641[天文地球—地质矿产勘探]