Analysis of Residual CO2 Trapping in the Porous Media by Means of X-ray CT
Analysis of Residual CO2 Trapping in the Porous Media by Means of X-ray CT
复制标题
利用 X 射线 CT 分析多孔介质中残余 CO2 的捕集
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
T. Shiote
中科院分区：
文献类型：
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作者：
A. Sato;Katsuya Tanaka;T. Shiote
CCS（二氧化碳捕获与储存）被认为是减少排放到空气中的二氧化碳量的最有效方法之一。在这些工程中，必须对水库的储存量进行估算，并对水库的CO2捕集效果进行评估。本文的目的是利用x射线CT分析含水层中CO2储存后在多孔介质中捕获的残余CO2。进行了CO2注入和连续注水试验，并通过x射线CT方法分析了水- CO2的置换和捕集过程。在这里，估算了CO2注入试验期间孔隙中CO2的置换量。对连续注水试验过程中岩石孔隙中残留CO2量进行了估算，并讨论了替代/捕获CO2量与岩石孔隙度分布的关系。研究发现，在孔隙度相对较高的区域，CO2储存较多，且在注水过程中，高孔隙度区域的残余比容易降低。然而，也发现在注入6 ~ 10倍孔隙体积的水后，仍有大约10%的注入CO2残留。
CCS (Carbon dioxide Capture & Storage) is expected as one of most efficient methods in order to reduce the amount of exhausted CO2 into the air. In the projects, the estimation of storage volume and the assessment of CO2 trapping effect in the reservoir are necessary. The objective of this paper is to analyze the residual CO2 trapping in the porous media after the storage of CO2 in the aquifer by means of X-ray CT. The CO2 injection and successive water injection test were conducted, and the replacement and trapping process of water — CO2 was analyzed by X-ray CT method. Here, the amount of CO2 replaced in the pore during CO2 injection tests was estimated. The amount of residual CO2 trapped in the rock pore during successive water injection tests was also estimated, and relations between the replaced/trapped CO2 and the porosity distribution of rock were discussed. It was found that more CO2 was stored at the relatively high porosity region, and that the residual ratio at the high porosity region easily decreased during the water injection process. However, it was also found that the approximately 10 % of injected CO2 was still remained after the six to ten times pore volume of water was injected into the rock sample.
影响因子：
64.8
作者：
Gilfillan, Stuart M. V.;Lollar, Barbara Sherwood;Ballentine, Chris J.
通讯作者：
Ballentine, Chris J.