发明名称 |
Determining resistivity of a formation adjacent to a borehole having casing with an apparatus having all current conducting electrodes within the cased well |
摘要 |
Methods of operation of different types of multiple electrode apparatus vertically disposed in a cased well to measure information useful to determine the resistivity of adjacent geological formations from within the cased well are described. The multiple electrode apparatus has a plurality of spaced apart voltage measurement electrodes that electrically engage a portion of the interior of the cased well. During measurements of information useful to determine formation resistivity, current is conducted between a first current conducting electrode in electrical contact with the interior of the cased well to a second current conducting electrode that is also in electrical contact with the interior of the cased well. The first and second current conducting electrodes are separated by a distance sufficient so that at least a portion of the current conducted between the first and second current conducting electrodes is conducted through the geological formation of interest.
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申请公布号 |
US6246240(B1) |
申请公布日期 |
2001.06.12 |
申请号 |
US19990310312 |
申请日期 |
1999.05.12 |
申请人 |
WESTERN ATLAS INTERNATIONAL, INC. |
发明人 |
VAIL, III WILLIAM BANNING |
分类号 |
G01V3/24;G01V11/00;(IPC1-7):G01V3/20 |
主分类号 |
G01V3/24 |
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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