发明名称 |
Continuous gravity gradient logging |
摘要 |
A continuous gravimetry survey is carried out with a gravity logging tool having a column of fluid within the tool. First and second pressure sensors are located at spaced-apart axial positions within an upper portion of the fluid column. Third and fourth pressure sensors are located at spaced-apart axial positions within a lower portion of the fluid column. The outputs from the first and second pressure sensors are differenced to produce a first pressure difference signal. The outputs of the third and fourth pressure sensors are also differenced to produce a second pressure difference signal. The difference between these first and second pressure difference signals is related to the gravity gradient along the earth formation adjacent the fluid column. Such a gravity gradient is a continuously moving gradient that is insensitive to acceleration effects from unsteady motions of the logging tool as it traverses the earth formation during the gravimetry survey.
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申请公布号 |
US4602508(A) |
申请公布日期 |
1986.07.29 |
申请号 |
US19840657657 |
申请日期 |
1984.10.04 |
申请人 |
MOBIL OIL CORPORATION |
发明人 |
FITCH, JOHN L.;LYLE, JR., W. D. |
分类号 |
G01V7/00;(IPC1-7):G01V7/00 |
主分类号 |
G01V7/00 |
代理机构 |
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