Numerical Evaluation of MagneticDipole Field in Inclined Multilayer Dipping Media
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摘要: 研究倾斜分层非均匀介质条件下磁偶极子源在介质空间的电磁响应,给出了场表达式和数值递推算法,提出了在大倾角条件下利用电阻率曲线划分界面和进行前向预测的方法,数值模拟和应用实践证明该方法是有效的,结论具有一定的应用价值.Abstract: The electromagnetic response of magnetic-dipole in inclined multilayer dipping media was studied. Electromagnetic field formulas and a successive derived numerical method were given. On the above basis, a approach to profile and to predetermine the formation interface using resistivity readings at large dip angle was presented. Numerical simulation and application both proved that the approach is efficient. The present results are suggested to be valuable for application.
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Key words:
- electrical resistivity /
- electromagnetic waves /
- inhomogeneous medium /
- well logging
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[1] Anderson B, Bonner S, Luling M G, et al. Resoonse of 2MHz LWD resistivity and wireline induction tools in dipping beds and laminated formations. SPWLA 31th Annual Logging Symposium. 1990 [2] Bittar M S, Rodney P F. The effect of rock anisotropy on MWD electromagnetic wave resistivity sensors[J]. The Log Analyst, 1996, 37(1):20~30 [3] Hardman R H, Shen L C. Theory of induction sonde in dipping beds[J]. Geophysics, 1986, 51(3):800~809 [4] Anderson B, Safinga K A, Habsky T. Effect of dipping beds on the response of induction tools. SPE 61st Annual Technical Conference. 1986 [5] Huang M, Shen L C. Computation of induction logs in multiple-layer dipping formation[J]. IEEE Trans Geoscience and Remote Sensing, 1989, 34(2):18~27 -
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