Effect of high salinity on CO 2 geological storage: A case study of Qianjiang depression in Jianghan basin

被引：13

作者：

Li, Yi-Lian ^{[1
]}

Fang, Qi ^{[1
]}

Ke, Yi-Bing ^{[1
]}

Dong, Jian-Xing ^{[1
]}

Yang, Guo-Dong ^{[1
]}

Ma, Xin ^{[1
]}

机构：

[1] School of Environmental Studies, China University of Geosciences

来源：

Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences | 2012年 / 37卷 / 02期

关键词：

Brine; CO [!sub]2[!/sub] geological storage; CO [!sub]2[!/sub] injection with brine production; High salinity; Hydrogeology; Pollution control;

D O I：

10.3799/dqkx.2012.030

中图分类号：

学科分类号：

摘要：

The brine resource in the Qianjiang depression in Jianghan basin is rich in the brine resource because alternating deposits of gypsum mudstone, mudstone as well as sandstone of Qianjiang Formation form the potential sites for CO 2 geological storage. However, the salinity in Qianjiang Formation is very high with the average value up to 283.25 g/L. The purpose of this study is to investigate the physical and chemical responses under the condition of high salinity. The results show that the CO 2 dissolved in brine and sequestered in minerals decline significantly as a result of directly injecting CO 2 into the brine with high salinity, which may affect the storage safety. Moreover, high salinity will lead to serious salt precipitation around the injection well which may reduce the injectivity. High salinity can also cause the high pressure build up around the injection well. The method of CO 2 injection combined with brine production can effectively mitigate the severe pressure build up and salt precipitation. In this way, we can maximize the utilization of brine resource and the underground space and achieve both the econimic benifits and the environmental benefits.

引用

页码：283 / 288

页数：5

共 18 条

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