Exact Three-Dimensional Electromagnetic Model: MWD/LWD Anisotropic Prediction for Rh and Rv
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Wilson C. Chin
Abstract
In resistivity log analyses, it is common to correct “apparent resistivity” predictions for borehole, shoulder bed, wellbore mud and fluid invasion effects. While this is important, the use of apparent resistivities is often based on the assumption of a homogeneous isotropic background medium. This is generally not true in modern logging applications. While more sophisticated analyses are available to study anisotropy, many of the methods are proprietary and unpublished. In this paper, we illustrate how, using a new fully three-dimensional electromagnetic model (applicable to fiberglass or metal mandrels and larger-size transmitter and receiver coils in layered anisotropic media with dip), both Rh and Rv resistivities can be straightforwardly predicted from standard tool measurements. Because both the model and application are new, we will review the underlying theory and numerical implementation before describing the detailed procedures developed to study MWD/LWD anisotropy.
References
1. W.C. Chin, Electromagnetic Well Logging: Models for MWD/LWD Interpretation and Tool Design, John Wiley & Sons, New Jersey (2014).Search in Google Scholar
2. J.A. Stratton, Electromagnetic Theory, McGraw-Hill, New York (1941).Search in Google Scholar
3. R.P. Feynman, R.B. Leighton and M. Sands, The Feynman Lectures on Physics, Addison-Wesley, MA (1964).10.1063/1.3051743Search in Google Scholar
4. D. Crider, M. Scherrer,T. Pham, J.J. Zach, and M.A. Frenkel, Full-azimuth, anisotropic 3D EM inversion applied to a low-resistivity pay reservoir with well control. Proceedings, Society of Exploration (SEG) Geophysicists Annual Meeting. Denver, CO. 690-695, (2010).10.1190/1.3513876Search in Google Scholar
5. C.C. Pain, J.V. Herwanger, J.H. Saunders, M.H. Worthington, and C.R.E. de Oliveira, Anisotropic resistivity inversion. Inverse Problems, Vol. 19, p. 1081 (2003).10.1088/0266-5611/19/5/306Search in Google Scholar
6. T.C. Wiese, DC Anisotropic Resistivity sensitivity and inversion. Doctoral Thesis, The University of Adelaide (2012).Search in Google Scholar
7. Z.J. Zhang, N. Yuan, and R. Liu, 1-D inversion of triaxial induction logging in layered anisotropic formation. Progress in Electromagnetic Research B. Vol. 44, 383-403 (2012).Search in Google Scholar
© 2015 Wilson C. Chin, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
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Articles in the same Issue
- Wellbore Integrity Special Issue
- Drilling Costs Estimation for Hydrocarbon Wells
- 10.7569/jsee.2015.629504
- Leak Risk Assessment for Plugged Wells in Carbon Sequestration Projects
- Assessing the Groundwater Contamination Potential from a Well in a Hydraulic Fracturing Operation
- 10.7569/jsee.2015.629509
