非对称电偶极在地层中的热效应解析解
Analytical solution about heating effects of a non-symmetrical dipole in lossy media
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摘要: 用近似法分析了有耗媒质中非对称电偶极的激励场,得到一个场和焦耳热的简单的解析表达式。与传统的对称型半波振子公式相比较,其下端导体的电流分布表达式相同,当下端导体为四分之一波长时激励近场表达式相近。结合典型储油层给出一些计算结果,对电磁波采油技术有参考价值。Abstract: An approximate method is used to analyse the excited fields with a non-symmetrical dipole in lossy media and simple analytical expressions about the fields and joule heat are obtained. These expressions are compared with the formulas of traditional symmetrical half-wave dipole. Some calculated results are given for a typical oil reservior, which will be useful for the electromagnetic wave oil recovery technique.
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A. Chakma, K. N. Jha, Heating oil recovery from thin pay zone by electromagnetic heating, SPE 24817, 1992, 525-534.[2]M.Y. Xia, Z. Y. Chan, Attenuation predictions at extremely low frequencies for measurement while drilling electromagnetic telemetry system, IEEE-GRS, 1993, 31(6), 1222 1228.[3]Chen Zhiyu, Xia Mingyao, The frequency property of buried non-symmetrical dipole, International Journal of Electronics, 1993, 75(4), 783-793. ［4］R.W.P. King, K. IIZUKA, The complete electromagnetic field of a half-wave dipole in a dissipative medium, IEEE-AP, 1963, 11(5), 275-285. -
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