公开(公告)号：US20100082255A1

公开(公告)日：2010-04-01

申请号：US12241141

申请日：2008-09-30

申请人： Sofia Davydycheva ,  Dean Homan ,  Dzevat Omeragic

发明人： Sofia Davydycheva ,  Dean Homan ,  Dzevat Omeragic

IPC分类号： G01V3/38

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。

公开(公告)号：US08200437B2

公开(公告)日：2012-06-12

申请号：US12241141

申请日：2008-09-30

申请人： Sofia Davydycheva ,  Dean Homan ,  Dzevat Omeragic

发明人： Sofia Davydycheva ,  Dean Homan ,  Dzevat Omeragic

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。

公开(公告)号：US06680613B2

公开(公告)日：2004-01-20

申请号：US10367413

申请日：2003-02-14

申请人： Richard A. Rosthal ,  Dean Homan ,  Thomas D. Barber ,  Stephen Bonner ,  Brian Clark ,  Dzevat Omeragic

发明人： Richard A. Rosthal ,  Dean Homan ,  Thomas D. Barber ,  Stephen Bonner ,  Brian Clark ,  Dzevat Omeragic

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。

公开(公告)号：US20050212520A1

公开(公告)日：2005-09-29

申请号：US10812369

申请日：2004-03-29

申请人： Dean Homan ,  Dzevat Omeragic ,  Tianhua Zhang ,  Nicolas Sebline

发明人： Dean Homan ,  Dzevat Omeragic ,  Tianhua Zhang ,  Nicolas Sebline

IPC分类号： E21B47/00 ,  E21B47/12 ,  G01V3/18 ,  G01V3/20 ,  G01V3/26 ,  G01V3/28 ,  G01V3/30

CPC分类号： G01V3/30

摘要： Sensor assemblies including transmitter and receiver antennas to respectively transmit or receive electromagnetic energy. The sensor assemblies are disposed in downhole tools adapted for subsurface disposal. The receiver is disposed at a distance less than six inches (15 cm) from the transmitter on the sensor body. The sensor transmitter or receiver includes an antenna with its axis tilted with respect to the axis of the downhole tool. A sensor includes a tri-axial system of antennas. Another sensor includes a cross-dipole antenna system.

摘要翻译： 传感器组件包括用于分别发送或接收电磁能的发射机和接收机天线。 传感器组件设置在适于地下处置的井下工具中。 接收器设置在距离传感器主体上的发射器小于6英寸（15厘米）的距离处。 传感器发射器或接收器包括天线，其天线的轴线相对于井下工具的轴线倾斜。 传感器包括三轴天线系统。 另一传感器包括一个交叉偶极天线系统。

公开(公告)号：US06788065B1

公开(公告)日：2004-09-07

申请号：US09689574

申请日：2000-10-12

申请人： Dean Homan ,  Dzevat Omeragic

发明人： Dean Homan ,  Dzevat Omeragic

IPC分类号： G01V330

CPC分类号： G01V3/30

摘要： Tubulars for monitoring subsurface reservoir characteristics in directed orientations. Elongated tubulars for permanent subsurface disposal are equipped with antennas adapted to transmit or receive electromagnetic energy. A tilted antenna is disposed within a groove on the tubular exterior. The groove includes a sealed opening to allow for passage of electromagnetic energy therethrough and the antenna is disposed within the groove in alignment with the opening such that the antenna is substantially perpendicular to the opening at the intersection. Methods for subsurface reservoir monitoring using the tubulars are also presented.

摘要翻译： 用于监测定向方向的地下储层特征的管状体。 用于永久地下处理的细长管配备有适于传输或接收电磁能的天线。 倾斜的天线设置在管状外部的凹槽内。 凹槽包括密封的开口，以允许电磁能量通过其中，并且天线设置在凹槽内，与开口对准，使得天线基本上垂直于相交处的开口。 还提出了使用管状物进行地下储层监测的方法。

公开(公告)号：US06573722B2

公开(公告)日：2003-06-03

申请号：US09737891

申请日：2000-12-15

申请人： Richard A. Rosthal ,  Dean Homan ,  Thomas D. Barber ,  Stephen Bonner ,  Brian Clark ,  Dzevat Omeragic

发明人： Richard A. Rosthal ,  Dean Homan ,  Thomas D. Barber ,  Stephen Bonner ,  Brian Clark ,  Dzevat Omeragic

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.

公开(公告)号：US06710601B2

公开(公告)日：2004-03-23

申请号：US10367475

申请日：2003-02-14

申请人： Richard A. Rosthal ,  Dean Homan ,  Thomas D. Barber ,  Stephen Bonner ,  Brian Clark ,  Dzevat Omeragic

发明人： Richard A. Rosthal ,  Dean Homan ,  Thomas D. Barber ,  Stephen Bonner ,  Brian Clark ,  Dzevat Omeragic

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。

公开(公告)号：US06624634B2

公开(公告)日：2003-09-23

申请号：US10367398

申请日：2003-02-14

申请人： Richard A. Rosthal ,  Dean Homan ,  Thomas D. Barber ,  Stephen Bonner ,  Brian Clark ,  Dzevat Omeragic

发明人： Richard A. Rosthal ,  Dean Homan ,  Thomas D. Barber ,  Stephen Bonner ,  Brian Clark ,  Dzevat Omeragic

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。

公开(公告)号：US20050083064A1

公开(公告)日：2005-04-21

申请号：US10605375

申请日：2003-09-25

申请人： Dean Homan ,  Gerald Minerbo ,  Sofia Davydycheva

发明人： Dean Homan ,  Gerald Minerbo ,  Sofia Davydycheva

IPC分类号： G01V3/30 ,  G01V3/00 ,  E21B47/00

CPC分类号： G01V3/28

摘要： A composite shell adapted to cover a source or sensor, particularly for subsurface applications. The shell provides transparency to the passage of signals to or from the source or sensor. The shell is adapted with a uniform semi-conductive surface providing a path for electric currents flowing within a subsurface borehole to short near the source or sensor.

摘要翻译： 适用于覆盖源或传感器的复合外壳，特别是用于地下应用。 外壳提供信号到源或传感器通过的透明度。 壳体适配于均匀的半导电表面，为在地下钻孔中流动的电流提供路径，以在源极或传感器附近短路。

公开(公告)号：US20050083161A1

公开(公告)日：2005-04-21

申请号：US10711309

申请日：2004-09-09

申请人： Gerald Minerbo ,  Sofia Davydycheva ,  Hanming Wang ,  Dean Homan

发明人： Gerald Minerbo ,  Sofia Davydycheva ,  Hanming Wang ,  Dean Homan

IPC分类号： G01V3/28 ,  G01V3/08

CPC分类号： G01V3/28

摘要： An induction tool includes a conductive mandrel; at least one array including a transmitter, a bucking coil, and a receiver disposed in an insulating tool body surrounding the conductive mandrel; and an electrode disposed on the insulating tool body at a selected location between the bucking coil and the receiver, wherein the selected location is spaced from the transmitter at a distance corresponding approximately to the harmonic mean of the distance between the transmitter and the bucking coil and the distance between the transmitter and the receiver, and wherein the electrode includes a contact forming a conductive path to the conductive mandrel. Additional electrodes may be disposed above and below each transmitter and receiver coil to reduce sensitivity to eccentricity of the tool in the borehole.

摘要翻译： 感应工具包括导电心轴; 至少一个阵列，包括发射器，降压线圈和设置在围绕导电心轴的绝缘工具主体中的接收器; 以及电极，其设置在所述绝缘工具主体之间的所述抵消线圈和所述接收器之间的选定位置处，其中所述选定位置与所述发射器间隔开大致相当于所述发射器和所述抗弯线圈之间的距离的谐波平均值的距离;以及 发射器和接收器之间的距离，并且其中电极包括形成到导电心轴的导电路径的触点。 附加的电极可以设置在每个发射器和接收器线圈之上和之下，以降低钻孔中工具的偏心度的灵敏度。