发明授权
- 专利标题： Method and apparatus for measuring the resistivity of earth formations using anti-parallel active and passive focussing electrodes
- 专利标题（中）： 使用反并联有源和无源聚焦电极测量地层电阻率的方法和装置
-
申请号： US483039申请日： 1990-02-20
-
公开(公告)号： US5036283A公开(公告)日： 1991-07-30
- 发明人: Jean-Claude Trouiller , Marie-Therese Gounot
- 申请人： Jean-Claude Trouiller , Marie-Therese Gounot
- 申请人地址： NY New York
- 专利权人： Schlumberger Technology Corporation
- 当前专利权人： Schlumberger Technology Corporation
- 当前专利权人地址： NY New York
- 优先权： FRX8902158 19890220
- 主分类号： G01V3/20
- IPC分类号： G01V3/20 ; G01V3/24
摘要：
The invention relates to a logging method and apparatus for determining the electrical resistivity of an earth formation traversed by a borehole. The resistivity is determined using a measuring pad which has a central electrode operable to deliver a measuring current. The measuring current is focused radially by means of two focusing systems: an active focusing system which focuses the measuring current in a first direction; and a passive focusing system which focuses the measuring current in a second direction perpendicular to said first direction.
公开/授权文献
信息查询
