DC resistivity modelling in anisotropic media with Gaussian quadrature grids

2009 ◽  
Vol 2009 (1) ◽  
pp. 1 ◽  
Author(s):  
M. Greenhalgh ◽  
B. Zhou ◽  
S. Greenhalgh
Keyword(s):  
Gaussian Quadrature ◽  
Anisotropic Media ◽  
Dc Resistivity

scholarly journals EMT simulation and effect of TTI anisotropic media in EMT signal

2021 ◽  
Author(s):  
Qing-Yun Di ◽  
Olalekan Fayemi ◽  
Qi-Hui Zhen ◽  
Tian Fei
Keyword(s):  
Gaussian Quadrature ◽  
Anisotropic Media ◽  
Quadrature Rule ◽  
Transverse Magnetic ◽  
Measured Signal ◽  
Anisotropic Parameter ◽  
Transverse Magnetic Mode ◽  
Anisotropic Models ◽  
Isotropic Media ◽  
Order Of Magnitude

AbstractAn axisymmetric finite difference method is employed for the simulations of electromagnetic telemetry in the homogeneous and layered underground formation. In this method, we defined the anisotropy property using extensive 2D conductivity tensor and solved it in the transverse magnetic mode. Significant simplification arises in the decoupling of the anisotropic parameter. The developed method is cost-efficient, 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 coefficient of anisotropy. We show that the effect of the tilt of the subsurface medium can be observed with sufficient accuracy and that it is an order of magnitude of 5 over the tilt of 90 degrees. Lastly, consistent results with existing field data were obtained by employing the Gaussian quadrature rule for the computation of surface measured signal.

scholarly journals 2.5-D/3-D resistivity modelling in anisotropic media using Gaussian quadrature grids

2009 ◽  
Vol 176 (1) ◽  
pp. 63-80 ◽  
Author(s):  
Bing Zhou ◽  
Mark Greenhalgh ◽  
S. A. Greenhalgh
Keyword(s):  
Gaussian Quadrature ◽  
Anisotropic Media

scholarly journals DC resistivity modelling with a Gaussian quadrature grid

2006 ◽  
Vol 2006 (1) ◽  
pp. 1-4
Author(s):  
Bing Zhou ◽  
Mark Greenhalgh ◽  
Stewart Greenhalgh
Keyword(s):  
Gaussian Quadrature ◽  
Dc Resistivity ◽  
Quadrature Grid
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