Borehole current correction for tilted or transverse magnetic dipoles on conductive supports
    2.
    发明授权
    Borehole current correction for tilted or transverse magnetic dipoles on conductive supports 有权
    导电支撑上倾斜或横向磁偶极子的钻孔电流校正

    公开(公告)号:US06710601B2

    公开(公告)日:2004-03-23

    申请号:US10367475

    申请日:2003-02-14

    IPC分类号: G01V318

    CPC分类号: G01V3/28

    摘要: Methods and apparatus are disclosed for minimizing or eliminating an undesired axial electric current induced along a subsurface borehole in the process of subsurface measurements with transmitter and/or receiver antennas which are substantially time varying magnetic dipoles with their dipole moments aligned at an angle to the axis of the borehole. Some antennas are disposed within the borehole on instruments having a non-conductive support member. One instrument includes a conductive all-metal body with an antenna adapted for induction frequencies. Antenna shields adapted for controlled current flow are also provided with an all-metal instrument. Methods include providing an alternate path for the current along the instrument body. Another method includes emitting a controlled current to counter the undesired current. Another method corrects for the effect of the current using a superposition technique. An embodiment of the instrument includes an antenna disposed between a pair of electrically coupled electrodes. The antenna is disposed on the instrument such that it comprises a tilted or transverse magnetic dipole. Another embodiment of the instrument includes a non-conductive housing with a conductive segment disposed thereon. An antenna is disposed on the instrument about the conductive segment. Another embodiment includes an antenna disposed between two pairs of electrodes with a device to measure a voltage at the electrodes when electromagnetic energy is transmitted within the borehole. Yet another instrument includes an antenna disposed between a first pair of electrodes and a device to measure a voltage at the elecrodes when electromagnetic energy is transmitted within the borehole. This embodiment also includes a device to energize a second electrode pair in response to the voltage measured at the first electrode pair.

    摘要翻译: 公开了用于在地下测量过程中沿着地下钻孔感应的不期望的轴向电流的发射机和/或接收机天线的最小化或消除的方法和装置,所述发射机和/或接收机天线是基本上时变的磁偶极,其偶极矩与轴成一定角度 的钻孔。 一些天线设置在具有非导电支撑构件的仪器上的钻孔内。 一种仪器包括具有适用于感应频率的天线的导电全金属体。 适用于受控电流流动的天线屏蔽还配有全金属仪器。 方法包括提供沿着仪器主体的电流的替代路径。 另一种方法包括发射受控电流以对抗不需要的电流。 另一种方法使用叠加技术来纠正当前的效果。 仪器的一个实施例包括设置在一对电耦合电极之间的天线。 天线设置在仪器上,使得其包括倾斜或横向磁偶极子。 仪器的另一实施例包括其上设置有导电段的非导电壳体。 天线设置在仪器周围导电段。 另一个实施例包括设置在两对电极之间的天线,当电磁能量在钻孔内传输时,该天线具有用于测量电极处的电压的装置。 另一种仪器包括设置在第一对电极之间的天线和当在井眼内传输电磁能量时测量电极处的电压的装置。 该实施例还包括响应于在第一电极对测量的电压而激励第二电极对的装置。

    Borehole current correction methods and apparatus
    3.
    发明授权
    Borehole current correction methods and apparatus 有权
    井眼电流校正方法和装置

    公开(公告)号:US06624634B2

    公开(公告)日:2003-09-23

    申请号:US10367398

    申请日:2003-02-14

    IPC分类号: G01V302

    CPC分类号: G01V3/28

    摘要: Methods and apparatus are disclosed for minimizing or eliminating an undesired axial electric current induced along a subsurface borehole in the process of subsurface measurements with transmitter and/or receiver antennas which are substantially time varying magnetic dipoles with their dipole moments aligned at an angle to the axis of the borehole. Some antennas are disposed within the borehole on instruments having a non-conductive support member. One instrument includes a conductive all-metal body with an antenna adapted for induction frequencies. Antenna shields adapted for controlled current flow are also provided with an all-metal instrument. Methods include providing an alternate path for the current along the instrument body. Another method includes emitting a controlled current to counter the undesired current. Another method corrects for the effect of the current using a superposition technique. An embodiment of the instrument includes an antenna disposed between a pair of electrically coupled electrodes. The antenna is disposed on the instrument such that it comprises a tilted or transverse magnetic dipole. Another embodiment of the instrument includes a non-conductive housing with a conductive segment disposed thereon. An antenna is disposed on the instrument about the conductive segment. Another embodiment includes an antenna disposed between two pairs of electrodes with a device measure a voltage at the electrodes when electromagnetic energy is transmitted within the borehole. Yet another instrument includes an antenna disposed between a first pair of electrodes and a device to measure a voltage at the elecrodes when electromagnetic energy is transmitted within the borehole. This embodiment also includes a device to energize a second electrode pair in response to the voltage measured at the first electrode pair.

    摘要翻译: 公开了用于在地下测量过程中沿着地下钻孔感应的不期望的轴向电流的发射机和/或接收机天线的最小化或消除的方法和装置,所述发射机和/或接收机天线是基本上时变的磁偶极,其偶极矩与轴成一定角度 的钻孔。 一些天线设置在具有非导电支撑构件的仪器上的钻孔内。 一种仪器包括具有适用于感应频率的天线的导电全金属体。 适用于受控电流流动的天线屏蔽还配有全金属仪器。 方法包括提供沿着仪器主体的电流的替代路径。 另一种方法包括发射受控电流以对抗不需要的电流。 另一种方法使用叠加技术来纠正当前的效果。 仪器的实施例包括设置在一对电耦合电极之间的天线。 天线设置在仪器上,使得其包括倾斜或横向磁偶极子。 仪器的另一实施例包括其上设置有导电段的非导电壳体。 天线设置在仪器周围导电段。 另一个实施例包括设置在两对电极之间的天线,当在钻孔内传输电磁能时,器件测量电极处的电压。 另一种仪器包括设置在第一对电极之间的天线和当在井眼内传输电磁能量时测量电极处的电压的装置。 该实施例还包括响应于在第一电极对测量的电压而激励第二电极对的装置。

    APPARATUS AND METHOD TO MEASURE FLUID RESISTIVITY
    4.
    发明申请
    APPARATUS AND METHOD TO MEASURE FLUID RESISTIVITY 有权
    测量流体电阻率的方法和方法

    公开(公告)号:US20070018659A1

    公开(公告)日:2007-01-25

    申请号:US11184527

    申请日:2005-07-19

    IPC分类号: G01R27/08

    CPC分类号: G01V3/20 E21B49/10

    摘要: An apparatus for measuring fluid resistivity includes a flow line adapted to be in fluid communication with formation fluids, wherein the flow line includes a first section comprising a first conductive area, a second section comprising a second conductive area, and an insulating section disposed between the first section and the second section to prevent direct electrical communication between the first section and the second section; a first toroid and a second toroid surrounding the flow line around the first section and the second section, respectively, wherein the first toroid is configured to induce an electrical current in a fluid in the flow line and the second toroid is configured to measure the electrical current induced in the fluid in the flow line; and an electronic package to control functions of the first toroid and the second toroid.

    摘要翻译: 一种用于测量流体电阻率的装置包括适于与地层流体流体连通的流动管线,其中流动管线包括第一部分,该第一部分包括第一导电区域,第二部分包括第二导电区域,以及绝缘部分, 第一部分和第二部分,以防止第一部分和第二部分之间的直接电气连通; 分别围绕第一部分和第二部分围绕流动管线的第一环形线圈和第二环形线圈,其中第一环形线圈被配置为在流动线路中的流体中感应电流,并且第二环形线圈被配置为测量电气 在流线中的流体中引起的电流; 以及用于控制第一环形线圈和第二环形线圈的功能的电子封装。

    Method and apparatus for cancellation of borehole effects due to a tilted or transverse magnetic dipole
    5.
    发明授权
    Method and apparatus for cancellation of borehole effects due to a tilted or transverse magnetic dipole 有权
    用于消除由于倾斜或横向磁偶极子引起的井眼效应的方法和装置

    公开(公告)号:US06680613B2

    公开(公告)日:2004-01-20

    申请号:US10367413

    申请日:2003-02-14

    IPC分类号: G01V310

    CPC分类号: G01V3/28

    摘要: Methods and apparatus are disclosed for minimizing or eliminating an undesired axial electric current induced along a subsurface borehole in the process of subsurface measurements with transmitter and/or receiver antennas which are substantially time varying magnetic dipoles with their dipole moments aligned at an angle to the axis of the borehole. Some antennas are disposed within the borehole on instruments having a non-conductive support member. One instrument includes a conductive all-metal body with an antenna adapted for induction frequencies. Antenna shields adapted for controlled current flow are also provided with an all-metal instrument. Methods include providing an alternate path for the current along the instrument body. Another method includes emitting a controlled current to counter the undesired current. Another method corrects for the effect of the current using a superposition technique. An embodiment of the instrument includes an antenna disposed between a pair of electrically coupled electrodes. The antenna is disposed on the instrument such that it comprises a tilted or transverse magnetic dipole. Another embodiment of the instrument includes a non-conductive housing with a conductive segment disposed thereon. An antenna is disposed on the instrument about the conductive segment. Another embodiment includes an antenna disposed between two pairs of electrodes with means to measure a voltage at the electrodes when electromagnetic energy is transmitted within the borehole. Yet another instrument includes an antenna disposed between a first pair of electrodes and means to measure a voltage at the electrodes when electromagnetic energy is transmitted within the borehole. This embodiment also includes means to energize a second electrode pair in response to the voltage measured at the first electrode pair.

    摘要翻译: 公开了用于在地下测量过程中沿着地下钻孔感应的不期望的轴向电流的发射机和/或接收机天线的最小化或消除的方法和装置,所述发射机和/或接收机天线是基本上时变的磁偶极,其偶极矩与轴成一定角度 的钻孔。 一些天线设置在具有非导电支撑构件的仪器上的钻孔内。 一种仪器包括具有适用于感应频率的天线的导电全金属体。 适用于受控电流流动的天线屏蔽还配有全金属仪器。 方法包括提供沿着仪器主体的电流的替代路径。 另一种方法包括发射受控电流以对抗不需要的电流。 另一种方法使用叠加技术来纠正当前的效果。 仪器的一个实施例包括设置在一对电耦合电极之间的天线。 天线设置在仪器上,使得其包括倾斜或横向磁偶极子。 仪器的另一实施例包括其上设置有导电段的非导电壳体。 天线设置在仪器周围导电段。 另一个实施例包括设置在两对电极之间的天线,其具有当电磁能量在钻孔内传输时测量电极处的电压的装置。 另一种仪器包括设置在第一对电极之间的天线和当电磁能量在钻孔内传输时测量电极处的电压的装置。 该实施例还包括响应于在第一电极对测量的电压来激励第二电极对的装置。

    Method and apparatus for cancellation of borehole effects due to a tilted or transverse magnetic dipole

    公开(公告)号:US06573722B2

    公开(公告)日:2003-06-03

    申请号:US09737891

    申请日:2000-12-15

    IPC分类号: G01V302

    CPC分类号: G01V3/28

    摘要: Methods and apparatus are disclosed for minimizing or eliminating an undesired axial electric current induced along a subsurface borehole in the process of subsurface measurements with transmitter and/or receiver antennas which are substantially time varying magnetic dipoles with their dipole moments aligned at an angle to the axis of the borehole. Some antennas are disposed within the borehole on instruments having a non-conductive support member. One instrument includes a conductive all-metal body with an antenna adapted for induction frequencies. Antenna shields adapted for controlled current flow are also provided with an all-metal instrument. Methods include providing an alternate path for the current along the instrument body. Another method includes emitting a controlled current to counter the undesired current. Another method corrects for the effect of the current using a superposition technique. An embodiment of the instrument includes an antenna disposed between a pair of electrically coupled electrodes. The antenna is disposed on the instrument such that it comprises a tilted or transverse magnetic dipole. Another embodiment of the instrument includes a non-conductive housing with a conductive segment disposed thereon. An antenna is disposed on the instrument about the conductive segment. Another embodiment includes an antenna disposed between two pairs of electrodes with means to measure a voltage at the electrodes when electromagnetic energy is transmitted within the borehole. Yet another instrument includes an antenna disposed between a first pair of electrodes and means to measure a voltage at the electrodes when electromagnetic energy is transmitted within the borehole. This embodiment also includes means to energize a second electrode pair in response to the voltage measured at the first electrode pair.

    Resistivity Tool with Selectable Depths of Investigation
    7.
    发明申请
    Resistivity Tool with Selectable Depths of Investigation 有权
    具有可选深度调查的电阻率工具

    公开(公告)号:US20070137854A1

    公开(公告)日:2007-06-21

    申请号:US11612881

    申请日:2006-12-19

    IPC分类号: E21B47/00

    CPC分类号: G01V3/28

    摘要: A wireline tool string used in a wellbore to determine formation properties is disclosed which comprises one or more transmitter tools disposed within the tool string, each transmitter tool having three linearly independent coils; a receiver tool disposed within the tool string, wherein the receiver tool has three linearly independent coils; and a tool string component disposed between the one or mole transmitter tools and the receiver tool; wherein the one or more transmitter tools are selectably spatially separated from the receiver tool along the tool string to provide a desired depth of investigation and measurements made using the one or more transmitter tools and receiver tool are used to determine formation properties

    摘要翻译: 公开了一种在井眼中用于确定地层特性的电缆工具串,其包括设置在工具串内的一个或多个发射器工具,每个发射器工具具有三个线性独立的线圈; 设置在所述工具串内的接收器工具,其中所述接收器工具具有三个线性独立的线圈; 以及设置在所述一个或多个发射器工具和所述接收器工具之间的工具串组件; 其中所述一个或多个发射器工具沿着所述工具串可选地在空间上与所述接收器工具分离以提供期望的调查深度,并且使用所述一个或多个发射器工具和接收器工具进行的测量被用于确定地层特性

    Insulated sleeve with conductive electrodes to reduce borehole effects for an induction tool

    公开(公告)号:US20060119364A1

    公开(公告)日:2006-06-08

    申请号:US11334198

    申请日:2006-01-17

    IPC分类号: G01V3/18

    CPC分类号: G01V3/28

    摘要: A well logging tool and method are disclosed comprising a conductive mandrel, an antenna array disposed around the conductive mandrel, wherein the antenna array comprises a plurality of antennas disposed on insulating supports and at least one contact spacer, the at least one contact spacer having at least one conductor channel having a contact assembly disposed therein, a sleeve disposed over the antenna array, wherein the sleeve includes at least one electrode assembly, the at least one electrode and the contact assembly adapted to provide a radially conductive path from an exterior of the well logging tool to the conductive mandrel and wherein the electrode assembly comprises a first conductor exposed to the exterior of the well logging tool and at least one second conductor conductively connected to the first conductor and exposed to an inner surface of the sleeve, wherein at least one of the first conductor or the second conductor being in sealed contact with the sleeve to prevent the passage of fluid through the sleeve.

    Method for borehole correction, formation dip and azimuth determination and resistivity determination using multiaxial induction measurements
    9.
    发明授权
    Method for borehole correction, formation dip and azimuth determination and resistivity determination using multiaxial induction measurements 有权
    使用多轴感应测量的钻孔校正,地层倾斜和方位角确定和电阻率测定方法

    公开(公告)号:US08200437B2

    公开(公告)日:2012-06-12

    申请号:US12241141

    申请日:2008-09-30

    IPC分类号: G01V3/18

    CPC分类号: G01V3/28

    摘要: A method for determining electromagnetic induction properties of subsurface rock formations includes determining an eccentering angle of a well logging instrument disposed in a wellbore. The instrument includes at least one triaxial induction transmitter and at least one triaxial induction receiver. The eccentering angle is determined from symmetric cross component measurement differences. The triaxial induction measurements made from the at least one receiver are rotated to an apparent eccentering angle of zero. At least one electromagnetic induction property is determined from the rotated triaxial induction measurements.

    摘要翻译: 用于确定地下岩层的电磁感应特性的方法包括确定设置在井眼中的测井仪器的偏心角度。 仪器包括至少一个三轴感应发射器和至少一个三轴感应接收器。 偏心角由对称交叉分量测量差异确定。 由至少一个接收器进行的三轴感应测量旋转到零的中心角。 从旋转的三轴感应测量确定至少一个电磁感应特性。

    DETERMINATION OF CONDUCTIVE FORMATION ORIENTATION BY MAKING WELLBORE SONDE ERROR CORRECTION
    10.
    发明申请
    DETERMINATION OF CONDUCTIVE FORMATION ORIENTATION BY MAKING WELLBORE SONDE ERROR CORRECTION 有权
    通过制造井筒SONDE错误校正来确定导电形成方位

    公开(公告)号:US20110309834A1

    公开(公告)日:2011-12-22

    申请号:US12817060

    申请日:2010-06-16

    IPC分类号: G01V3/30

    CPC分类号: G01V3/28

    摘要: A method for determining orientation of an electrically conductive formation proximate an electrically substantially non-conductive formation includes measuring multiaxial electromagnetic induction response within the substantially non-conductive formation using an instrument disposed in a wellbore drilled through the formations. A difference from zero conductivity is determined for each component measurement of the multiaxial electromagnetic induction response. The differences are used to correct the measured response of each component measurement in the electrically conductive response. The corrected component measurements are used to determine the orientation of the conductive formation.

    摘要翻译: 用于确定接近电气基本不导电地层的导电地层的取向的方法包括使用设置在穿过地层钻井的井筒中的仪器来测量在基本不导电地层内的多轴电磁感应响应。 对于多轴电磁感应响应的每个分量测量,确定零电导率的差异。 这些差异用于校正导电响应中每个部件测量的测量响应。 使用校正的分量测量来确定导电层的取向。