Publication Date:
2018
Description:
〈span〉〈div〉ABSTRACT〈/div〉Using geophysical methods, specifically transient electromagnetic (TEM), for CO〈sub〉2〈/sub〉 monitoring is an effective way to detect CO〈sub〉2〈/sub〉 diffusion. In this work, a multi-scale finite-difference time-domain (FDTD) algorithm was established to monitor CO〈sub〉2〈/sub〉 by defining new iterative relations and approximating boundary conditions, which achieves unification in the time and space domain. The response curve characteristics of different forms of CO〈sub〉2〈/sub〉 were acquired by changing the receiver's depth and position, CO〈sub〉2〈/sub〉 resistivity, scale, and injection stage. Different models considering a planar, tilted, and large-scale CO〈sub〉2〈/sub〉 bodies, which were established to test the capacity of TEM monitoring for CO〈sub〉2〈/sub〉. The TEM response of injected CO〈sub〉2〈/sub〉 bodies had obvious characteristics and the response curve had distinguishable differences from background. This phenomenon could provide reference models for real TEM CO〈sub〉2〈/sub〉 monitoring.〈/span〉
Print ISSN:
1083-1363
Electronic ISSN:
1943-2658
Topics:
Geosciences
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