EMT simulation and efect of TTI anisotropic media in EMT signal
发布时间：2024-01-08
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名 称
EMT simulation and efect of TTI anisotropic media in EMT signal
科技资源标识
CSTR:11738.14.NCDC.XDA14.PP5644.2024
DOI
10.1007/s12182-020-00523-0
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摘 要
An axisymmetric fnite diference method is employed for the simulations of electromagnetic telemetry in the homogeneous and layered underground formation. In this method, we defned the anisotropy property using extensive 2D conductivity tensor and solved it in the transverse magnetic mode. Signifcant simplifcation arises in the decoupling of the anisotropic parameter. The developed method is cost-efcient, more straightforward in modeling anisotropic media, and easy to be implemented. In addition, we solved the integral operation in the estimation of measured surface voltage using Gaussian quadrature technique. We performed a series of numerical modeling of EM telemetry signals in both isotropic and anisotropic models. Experiment with 2D tilt transverse isotropic media characterized by the tilt axis and anisotropy parameters shows an increase in the EMT signal with an increase in the angle of tilt of the principal axis for a moderate coefcient of anisotropy.We show that the efect of the tilt of the subsurface medium can be observed with sufcient accuracy and that it is an order of magnitude of 5 over the tilt of 90 degrees. Lastly, consistent results with existing feld data were obtained by employing the Gaussian quadrature rule for the computation of surface measured signal.
底青云,Olalekan Fayemi,真齐辉,田飞. EMT simulation and efect of TTI anisotropic media in EMT signal. 国家冰川冻土沙漠科学数据中心(http://www.ncdc.ac.cn), 2024. https://cstr.cn/CSTR:11738.14.NCDC.XDA14.PP5644.2024.
底青云,Olalekan Fayemi,真齐辉,田飞. EMT simulation and efect of TTI anisotropic media in EMT signal. 国家冰川冻土沙漠科学数据中心(http://www.ncdc.ac.cn), 2024. https://www.doi.org/10.1007/s12182-020-00523-0.
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CSTR:11738.14.NCDC.XDA14.PP5644.2024
10.1007/s12182-020-00523-0