Darcy-scale modeling of microbially induced carbonate mineral precipitation in sand columns
Darcy-scale modeling of microbially induced carbonate mineral precipitation in sand columns
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DOI：
10.1029/2011wr011714
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发表时间：
2012-07-28
影响因子：
5.4
通讯作者：
Spangler, L. H.
中科院分区：
文献类型：
--
作者：
Ebigbo, A.;Phillips, A.;Spangler, L. H.
这项调查的重点是使用微生物诱导碳酸钙沉淀（MICP）建立地下水力屏障，以潜在地提高二氧化碳储存地点的井筒附近的储存安全性。一个数值模型的开发，能够占碳酸盐沉淀由于尿素分解细菌的活动，以及在地下的两个流体相的流动。该模型进行了比较，涉及饱和流通过填砂柱的实验，以了解和优化所涉及的过程，以及验证的数值模型。然后，它被用来预测密相CO2和CO2饱和的水在多孔介质中的碳酸盐沉淀的效果。
This investigation focuses on the use of microbially induced calcium carbonate precipitation (MICP) to set up subsurface hydraulic barriers to potentially increase storage security near wellbores of CO2 storage sites. A numerical model is developed, capable of accounting for carbonate precipitation due to ureolytic bacterial activity as well as the flow of two fluid phases in the subsurface. The model is compared to experiments involving saturated flow through sand-packed columns to understand and optimize the processes involved as well as to validate the numerical model. It is then used to predict the effect of dense-phase CO2 and CO2-saturated water on carbonate precipitates in a porous medium.