CO2 injection monitoring using transient electromagnetic in ground-borehole configuration

Using geophysical methods, specifically transient electromagnetic (TEM), for CO2 monitoring is an effective way to detect CO2 diffusion. In this work, a multi-scale finite-difference time-domain (FDTD) algorithm was established to monitor CO2 by defining new iterative relations and approximating bou...

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Bibliographic Details
Published inJournal of environmental & engineering geophysics Vol. 23; no. 3; pp. 335 - 348
Main Authors Li Kai, Li Kai, Sun Huaifeng, Sun Huaifeng, Cheng Ming, Cheng Ming, Guo Jianlei, Guo Jianlei
Format Journal Article
LanguageEnglish
Published Environmental and Engineering Geophysical Society 01.09.2018
Subjects
applied (geophysical surveys & methods)
boundary conditions
carbon dioxide
carbon sequestration
diffusion
electrical methods
electromagnetic methods
Environmental geology
finite difference analysis
fluid injection
geophysical methods
Geophysics
global change
global warming
greenhouse gases
Maxwell's equations
monitoring
time domain reflectometry
transient methods
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Summary:Using geophysical methods, specifically transient electromagnetic (TEM), for CO2 monitoring is an effective way to detect CO2 diffusion. In this work, a multi-scale finite-difference time-domain (FDTD) algorithm was established to monitor CO2 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 CO2 were acquired by changing the receiver's depth and position, CO2 resistivity, scale, and injection stage. Different models considering a planar, tilted, and large-scale CO2 bodies, which were established to test the capacity of TEM monitoring for CO2. The TEM response of injected CO2 bodies had obvious characteristics and the response curve had distinguishable differences from background. This phenomenon could provide reference models for real TEM CO2 monitoring.
ISSN:1083-1363
DOI:10.2113/JEEG23.3.335