浅海电磁道分离同步采集的大地电磁测深观测试验  

MT surveying test of synchronous acquisition by separate electric and magnetic channels on shallow sea

作　　者：丁建荣[1] 王勇[1] 于鹏[2] 王家林[2] 郝天姚[3] 

机构地区：[1]中石化江苏油田分公司 [2]同济大学海洋地质教育部重点实验室 [3]中科院地质与地球物理研究所

出　　处：《石油地球物理勘探》2006年第1期107-110,共4页Oil Geophysical Prospecting

基　　金：国家高技术研究发展计划课题"中国近海前新生代残留盆地勘探技术研究"(2004AA615010-03);国家自然科学基金项目(40104005)资助

摘　　要：基于均匀水平层状介质模型条件,在地面总磁场水平分量与介质电阻率随深度变化无关的假设前提下,利用现有陆上大地电磁测深的仪器设备,在岸上布设磁道,在浅海水域布设电道,进行同步采集,并结合浅海的实际情况,采取相应的技术措施,实现了浅海大地电磁的观测。在试验中还系统地进行了不同电磁道距离、不同水深点采集及远参考道测量试验,并用一条海陆MT剖面观测对整个试验结果进行方法检验,证实了该方法的可行性。Based on the condition of homogeneous and horizontally layered medium and on the precondition of hypothesis that the horizontal component of total magnetic field on the ground and resistivity of medium are irrelative to variation of depth,using currently-used MT apparatus on the ground,laying out magnetic channels on the ground and electric channels on the shallow sea to carry out synchronous acquisition, the MT survey on the shallow sea could be realized in combination with the practical situation on the shallow sea and adopting relative technical measure. The different intervals of electrical and magnetic channels are also systematically tested. The different tests are carried out as follows: acquisitions at different depths and tests for surveying in far-referential channel, meanwhile, using a sea-land MT section survey to gain test results and examine the method,which proved the feasibility of the method.

关 键 词：大地电磁测深 浅海 电磁道分离同步 

分 类 号：P631.325[天文地球—地质矿产勘探] TV223.5[天文地球—地质学]