发明名称 |
Electromagnetic induction method and apparatus for the measurement of the electrical resistivity of geologic formations surrounding boreholes cased with a conductive liner |
摘要 |
Provided is a technique, including a method and a computer program product, to dynamically measure characteristics of geologic formations while hydrocarbons are being extracted therefrom. Specifically, the present invention allows measuring the resistivity of geologic formations in which a borehole has been formed therein and encased with a conductive casing, such as a conductive liner. This has been achieved by providing a method and computer program product that compensates for the effects of a conductive liner by measuring the characteristics of the geologic formation as a function of a ratio of two magnetic fields sensed by a receiver disposed in one of the boreholes.
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申请公布号 |
US6294917(B1) |
申请公布日期 |
2001.09.25 |
申请号 |
US19990394852 |
申请日期 |
1999.09.13 |
申请人 |
ELECTROMAGNETIC INSTRUMENTS, INC. |
发明人 |
NICHOLS EDWARD |
分类号 |
G01V3/28;(IPC1-7):G01V3/10;G01V3/26 |
主分类号 |
G01V3/28 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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