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公开(公告)号:US4663593A
公开(公告)日:1987-05-05
申请号:US712575
申请日:1985-03-15
IPC分类号: G01V3/08
CPC分类号: G01V3/082
摘要: A method of electromagnetic geophysical exploration of the earth's subterranean formations wherein an array of magnetometers are deployed at reference sites to obtain a measure of horizontal components of the earth's electromagnetic field and magnetometers are simultaneously deployed at a plurality of exploratory sites within a region of interest to obtain a measure of the vertical component of the earth's electromagnetic field. Resultant correlations of the horizontal and vertical components of the electromagnetic field can provide a multidimensional representation of the earth's resistivity structure.
摘要翻译: 一种对地球地层的电磁地球物理勘探方法,其中将磁力计阵列布置在参考地点以获得地球电磁场和磁力计的水平分量的量度的同时部署在感兴趣区域内的多个探索地点 获得地球电磁场垂直分量的测量。 电磁场的水平和垂直分量的相关关系可以提供地球电阻率结构的多维表示。
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公开(公告)号:US4581932A
公开(公告)日:1986-04-15
申请号:US684815
申请日:1984-12-20
CPC分类号: G01V7/10
摘要: A tuned borehole gravity gradiometer comprises a dipole mass system having means for selectively tuning the sensitivity of the gravity gradiometer to detect variations in the earth's gravity gradient within a borehole. The tuning means includes varying the metacentric height of the dipole mass system by selectively varying the center of gravity of the dipole mass system with respect to the metacenter of the dipole mass system.
摘要翻译: 调谐钻孔重力梯度计包括具有用于选择性地调节重力梯度计的灵敏度以检测井眼内的地球重力梯度的变化的装置的偶极质量系统。 调谐装置包括通过相对于偶极子质量系统的中心选择性地改变偶极子质量系统的重心来改变偶极子质量系统的中心高度。
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