Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Oil Geophysical Prospecting》 1989-03
Add to Favorite Get Latest Update

Long offset transient electromagnetic sounding in West Germany

Wu Huaijun  
Long offset transient electromagnetics(LOTEM)is characterized by the fact that the distance between transmitter and receiver is equal to or longer than exploration depth.The grounded dipole transmitter emits square-wave current into the earth.The current step induces eddy current in underground.The receiver records secondary magnetic field generated by eddy current.The recorded signals are processed in the way similar to seismic data processing,thus we obtain the infor- mations about distribution of underground resistivity. LOTEM test survey was done in West Germany.The processed L8803 profile shows the variation of resistivity of formations under- lying an igneous body.Tests show that LOTEM is helpful to resolv- ing some special exploration problems,for example,discovering the strueture that underlies an igneous body.
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved