非均匀P-偏振电磁波在导电界面的类全反射横向偏移  

The quasi total reflected lateral shift of inhomogeneous P-polarized electromagnetic wave on the interface of conductive media

作　　者：刘福平[1] 李瑞忠[2] 杨长春[3] 陈辉国[3] 高杰[4] 王安玲[1] 

机构地区：[1]北京印刷学院,北京102600 [2]中国石油化工集团公司经济技术研究院,北京100029 [3]中国科学院地质与地球物理研究所,北京100029 [4]中国石油大学(北京),资源与信息学院北京102249

出　　处：《地球物理学报》2007年第2期556-566,共11页Chinese Journal of Geophysics

基　　金：北京市教育委员会科技发展计划面上项目(KM200510015003);中国科学院知识创新重大项目(KZCX1-SW-18-04);北京印刷学院信号与信息处理重点建设学科项目资助

摘　　要：利用非均匀P-偏振电磁波(电场平行于入射面)在导电界面反射系数所产生的附加相角导出了非均匀电磁波在导电介质界面的横向偏移,并给出了一个低频电磁波算例,绘制了横向偏移随入射角的变化曲线.计算结果表明,入射角在相移常数临界角、衰减常数临界角和90°处,横向偏移曲线存在三个间断点;当入射角等于这三个角时,电磁波将沿界面传播;当入射角在这三个角附近时,横向偏移效应影响较大;在其他角度入射时横向偏移与波长在一个数量级.论文还讨论了横向偏移效应对电磁波测井测量结果所产生的误差,并给出了误差计算方法和算例.Using the phase shift of reflection coefficient at the interface between two conductive media, we derive the lateral shift of quasi total reflection of inhomogeneous P-polarized electromagnetic wave（whose electric field parallels to the incident plane）, and draw the curves of lateral shift with respect to the incident angle. The results show that there are three discontinuous points at the critical angles of phase constants, the critical angle of attenuation constants and 90°. When the incident angle approaches to one of the three angles, the lateral shift becomes very large. If the incident angle is equal to one of them, the lateral shift becomes infinite, i.e. the electromagnetic wave propagates along the interface. For other incident angles the lateral shift has the same order of magnitude as the wavelength. After accounting the lateral shift effect, we have discussed the measuring error of electromagnetic wave logging caused by the lateral shift effect, and given the computing method of measuring error.

关 键 词：非均匀P-偏振电磁波 导电媒质 横向偏移 相移常数 类全反射 

分 类 号：P631[天文地球—地质矿产勘探]