发明授权
- 专利标题: Electromagnetic wave logging system for determining resistivity and dielectric constant of earth formations
- 专利标题(中): 用于确定地层电阻率和介电常数的电磁波测井系统
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申请号: US800500申请日: 1977-05-25
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公开(公告)号: US4107598A公开(公告)日: 1978-08-15
- 发明人: Richard A. Meador , Larry L. Adams , James A. Fuchs , Percy T. Cox , Larry W. Thompson
- 申请人: Richard A. Meador , Larry L. Adams , James A. Fuchs , Percy T. Cox , Larry W. Thompson
- 申请人地址: NY New York
- 专利权人: Texaco Inc.
- 当前专利权人: Texaco Inc.
- 当前专利权人地址: NY New York
- 主分类号: G01R27/02
- IPC分类号: G01R27/02 ; G01V3/28 ; G01V3/18 ; G01V3/12
摘要:
A system operating at radio frequencies in the range of 10 MHZ to 60 MHZ is provided for simultaneously determining the resistivity and dielectric constant of earth formations in the vicinity of a well bore. A transmitter coil and two longitudinally spaced receiver coils are provided in the system. Circuit means for measuring the unnormalized amplitude ratio and the relative phase shift of electromagnetic waves at the spaced receiver coils are provided. A relationship is given whereby the formation dielectric constant and resistivity may be obtained from the amplitude ratio and relative phase shift measurements.
公开/授权文献
- US5718272A Facing surround assembly 公开/授权日:1998-02-17