公开(公告)号：US5036283A

公开(公告)日：1991-07-30

申请号：US483039

申请日：1990-02-20

申请人： Jean-Claude Trouiller ,  Marie-Therese Gounot

发明人： Jean-Claude Trouiller ,  Marie-Therese Gounot

IPC分类号： G01V3/20 ,  G01V3/24

CPC分类号： G01V3/20

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.

摘要翻译： 本发明涉及一种用于确定由钻孔穿过的地层的电阻率的测井方法和装置。 使用具有可操作以传递测量电流的中心电极的测量垫来确定电阻率。 测量电流通过两个聚焦系统径向聚焦：主动聚焦系统，其将测量电流聚焦在第一方向上; 以及被动聚焦系统，其将测量电流聚焦在垂直于所述第一方向的第二方向上。

公开(公告)号：US06545477B1

公开(公告)日：2003-04-08

申请号：US09980544

申请日：2002-03-05

申请人： Paul Beguin ,  Dominique Benimeli ,  Patrick Ehret ,  Francois Hecquet ,  Peter Van Der Wal ,  Marie-Therese Gounot

发明人： Paul Beguin ,  Dominique Benimeli ,  Patrick Ehret ,  Francois Hecquet ,  Peter Van Der Wal ,  Marie-Therese Gounot

IPC分类号： G01V302

CPC分类号： G01R27/20 ,  G01V3/20

摘要： The invention relates to a method of surveying a geological formation through which a cased borehole passes, said method being characterized by the fact that: in a first step, current is injected into the casing (11) at a first point (In1) spaced apart longitudinally from said formation so as to cause current to leak into said formation, and electrodes (a, b, c) defining two consecutive sections of casing situated at the level of said formation ,ire used to measure the respective potential drops along said sections; in a second step, current is injected into the casing at a second point (In2) spaced apart longitudinally from the formation and situated on the opposite side thereof from said first point, so as to cause current to leak into the formation, and said electrodes are used to measure the potential drops along said sections; the corresponding measurements of the two steps are combined to obtain the values corresponding to a circuit formed by the casing between the two injection points is and essentially exempt from leakage into the formation; and the current leakage that is indicative of the resistivity of the formation is determined on the basis of the measurements taken in the first step and in the second step, and of the values resulting from said combination.

摘要翻译： 本发明涉及一种对套管井眼通过的地质构造进行测量的方法，所述方法的特征在于：在第一步骤中，电流在间隔开的第一点（In1）处注入到壳体（11）中 纵向地从所述地层引起电流泄漏到所述地层中，并且限定位于所述地层水平处的壳体两个连续部分的电极（a，b，c）用于测量沿着所述区段的各个潜在的液滴; 在第二步骤中，电流在与地层纵向间隔开的第二点（In2）处注入到壳体中，并且位于与所述第一点相反的一侧上，从而使电流泄漏到地层中，并且所述电极 用于测量沿着所述部分的电位降;两个步骤的对应测量结合以获得对应于由两个注射点之间的壳体形成的电路的值 并且基本上免于泄漏进入地层; 并且基于在第一步骤和第二步骤中进行的测量以及由所述组合产生的值来确定表示地层电阻率的电流泄漏。

公开(公告)号：US06351129B1

公开(公告)日：2002-02-26

申请号：US09557120

申请日：2000-04-24

申请人： Marie-Therese Gounot

发明人： Marie-Therese Gounot

IPC分类号： G01V320

CPC分类号： G01V3/24

摘要： The invention relates to a method of surveying the resistivity of a geological formation through which a borehole provided with metal casing passes, in which method a leakage current is caused to leak into the formation outside the casing, and the leakage current is determined on a casing section at a certain level, the leakage current being indicative of the resistivity of the formation. According to a characteristic of the invention, the resistivity is determined on the basis of the leakage current by applying a factor that depends on the distance z between the level and the surface.

摘要翻译： 本发明涉及一种测量地质构造的电阻率的方法，通过该方法，设有金属壳体的钻孔通过该方法，在该方法中，泄漏电流泄漏到壳体外部的地层中，并且泄漏电流在壳体 断面处于一定水平，泄漏电流表示地层的电阻率。 根据本发明的特征，通过施加取决于水平面和表面之间的距离z的因子，基于泄漏电流来确定电阻率。