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公开(公告)号：US20090281731A1
公开(公告)日：2009-11-12
申请号：US12117089
申请日：2008-05-08
CPC分类号： G01V3/28
摘要： Impedances of an electromagnetic (EM) coil positioned in a well lined with an electrically conductive liner are determined. The impedances correspond to plural frequencies of operation of the EM coil. Based on the impedances of the EM coil corresponding to the plural frequencies, an attenuation factor associated with the electrically conductive liner is determined.
摘要翻译： 确定位于衬有导电衬垫的井中的电磁（EM）线圈的阻抗。 阻抗对应于EM线圈的多个操作频率。 基于对应于多个频率的EM线圈的阻抗，确定与导电衬垫相关联的衰减因子。
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公开(公告)号：US08326539B2
公开(公告)日：2012-12-04
申请号：US12117089
申请日：2008-05-08
IPC分类号： G01V1/40
CPC分类号： G01V3/28
摘要： Impedances of an electromagnetic (EM) coil positioned in a well lined with an electrically conductive liner are determined. The impedances correspond to plural frequencies of operation of the EM coil. Based on the impedances of the EM coil corresponding to the plural frequencies, an attenuation factor associated with the electrically conductive liner is determined.
摘要翻译： 确定位于衬有导电衬垫的井中的电磁（EM）线圈的阻抗。 阻抗对应于EM线圈的多个操作频率。 基于对应于多个频率的EM线圈的阻抗，确定与导电衬垫相关联的衰减因子。
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3.发明授权Determining correction factors representing effects of different portions of a lining structure 有权确定表示衬里结构的不同部分的影响的校正因子公开(公告)号：US07795872B2
公开(公告)日：2010-09-14
申请号：US11868379
申请日：2007-10-05
申请人： Brian Clark , Frank Morrison , Edward Nichols , Hong Zhang , Richard A. Rosthal
发明人： Brian Clark , Frank Morrison , Edward Nichols , Hong Zhang , Richard A. Rosthal
CPC分类号： G01V3/28
摘要： To determine effect on a magnetic field caused by a lining structure in a wellbore, an array may be deployed into the wellbore lined with the lining structure. The array comprises a plurality of sensors including sensor A configured to operate as a transmitter, sensor B configured to operate as either a transmitter or a receiver, and sensor C configured to operate as a receiver. The array measures magnetic fields using sensor B as a receiver and sensor C in response to activation of sensor B as a transmitter and sensor A. A plurality of lining structure correction factors can be calculated based on the measured magnetic fields, based on the reciprocity of the sensors.
摘要翻译： 为了确定在井眼中由衬里结构引起的对磁场的影响，阵列可以部署到衬里结构内衬的井眼中。 该阵列包括多个传感器，包括被配置为作为发射器操作的传感器A，被配置为作为发射机或接收机操作的传感器B以及被配置为作为接收机操作的传感器C. 该阵列响应于作为发射器和传感器A的传感器B的激活，使用传感器B作为接收器和传感器C来测量磁场。可以基于测量的磁场，基于测量的磁场计算多个衬里结构校正因子， 传感器。
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4.发明申请Determining correction factors representing effects of different portions of a lining structure 有权确定表示衬里结构的不同部分的影响的校正因子公开(公告)号：US20090091328A1
公开(公告)日：2009-04-09
申请号：US11868379
申请日：2007-10-05
申请人： Brian Clark , Frank Morrison , Edward Nichols , Hong Zhang , Richard A. Rosthal
发明人： Brian Clark , Frank Morrison , Edward Nichols , Hong Zhang , Richard A. Rosthal
IPC分类号： G01V3/12
CPC分类号： G01V3/28
摘要： To determine effect on a magnetic field caused by a lining structure in a wellbore, an array may be deployed into the wellbore lined with the lining structure. The array comprises a plurality of sensors including sensor A configured to operate as a transmitter, sensor B configured to operate as either a transmitter or a receiver, and sensor C configured to operate as a receiver. The array measures magnetic fields using sensor B as a receiver and sensor C in response to activation of sensor B as a transmitter and sensor A. A plurality of lining structure correction factors can be calculated based on the measured magnetic fields, based on the reciprocity of the sensors.
摘要翻译： 为了确定在井眼中由衬里结构引起的对磁场的影响，阵列可以部署到衬里结构内衬的井眼中。 该阵列包括多个传感器，包括被配置为作为发射器操作的传感器A，被配置为作为发射机或接收机操作的传感器B以及被配置为作为接收机操作的传感器C. 该阵列响应于作为发射器和传感器A的传感器B的激活，使用传感器B作为接收器和传感器C来测量磁场。可以基于测量的磁场，基于测量的磁场计算多个衬里结构校正因子， 传感器。
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5.发明申请Determining Correction Factors Representing Effects of Different Portions of a Lining Structure 审中-公开确定表征不同部分衬里结构的影响的校正因子公开(公告)号：US20100308832A1
公开(公告)日：2010-12-09
申请号：US12758556
申请日：2010-04-12
申请人： Brian Clark , Frank Morrison , Edward Nichols , Hong Zhang , Richard A. Rosthal
发明人： Brian Clark , Frank Morrison , Edward Nichols , Hong Zhang , Richard A. Rosthal
IPC分类号： G01V3/18
CPC分类号： G01V3/28
摘要： To determine effect on a magnetic field caused by a lining structure in a wellbore, an array may be deployed into the wellbore lined with the lining structure. The array comprises a plurality of sensors including sensor A configured to operate as a transmitter, sensor B configured to operate as either a transmitter or a receiver, and sensor C configured to operate as a receiver. The array measures magnetic fields using sensor B as a receiver and sensor C in response to activation of sensor B as a transmitter and sensor A. A plurality of lining structure correction factors can be calculated based on the measured magnetic fields, based on the reciprocity of the sensors.
摘要翻译： 为了确定在井眼中由衬里结构引起的对磁场的影响，阵列可以部署到衬里结构内衬的井眼中。 该阵列包括多个传感器，包括被配置为作为发射器操作的传感器A，被配置为作为发射机或接收机操作的传感器B以及被配置为作为接收机操作的传感器C. 该阵列响应于作为发射器和传感器A的传感器B的激活，使用传感器B作为接收器和传感器C来测量磁场。可以基于测量的磁场，基于测量的磁场计算多个衬里结构校正因子， 传感器。
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6.发明授权公开(公告)号：US08614578B2
公开(公告)日：2013-12-24
申请号：US12641898
申请日：2009-12-18
申请人： Guozhong Gao , H. Frank Morrison , Hong Zhang , Richard A. Rosthal , David Alumbaugh , Cyrille Levesque
发明人： Guozhong Gao , H. Frank Morrison , Hong Zhang , Richard A. Rosthal , David Alumbaugh , Cyrille Levesque
CPC分类号： G01V3/28
摘要： The present disclosure relates to determining the attenuation of an electromagnetic signal passing through a conductive material. An antenna is provided and placed in relatively close proximity to the conductive material. An alternating current is passed through the antenna and the impedance of the antenna is measured. The attenuation is determined using the measured impedance. A single frequency measurement may be made, or multiple measurements using different frequencies may be made. Grouped parameters based on properties of the material and the frequency of the current are used to relate the coil impedance to the attenuation. A current frequency for which the ratio of the antenna's resistive part of the impedance to the angular frequency of the current is substantially insensitive to at least one of the parameters is preferred.
摘要翻译： 本公开涉及确定通过导电材料的电磁信号的衰减。 提供天线并将其放置在相对靠近导电材料的位置。 交流电流通过天线，测量天线的阻抗。 使用测量的阻抗确定衰减。 可以进行单个频率测量，或者可以进行使用不同频率的多个测量。 基于材料性质和电流频率的分组参数用于将线圈阻抗与衰减相关联。 阻抗的电阻部分与电流的角频率的比率对于至少一个参数基本上不敏感的当前频率是优选的。
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公开(公告)号：US20100321023A1
公开(公告)日：2010-12-23
申请号：US12641898
申请日：2009-12-18
申请人： Guozhong Gao , H. Frank Morrison , Hong Zhang , Richard A. Rosthal , David Alumbaugh , Cyrille Levesque
发明人： Guozhong Gao , H. Frank Morrison , Hong Zhang , Richard A. Rosthal , David Alumbaugh , Cyrille Levesque
IPC分类号： G01V3/10
CPC分类号： G01V3/28
摘要： The present disclosure relates to determining the attenuation of an electromagnetic signal passing through a conductive material. An antenna is provided and placed in relatively close proximity to the conductive material. An alternating current is passed through the antenna and the impedance of the antenna is measured. The attenuation is determined using the measured impedance. A single frequency measurement may be made, or multiple measurements using different frequencies may be made. Grouped parameters based on properties of the material and the frequency of the current are used to relate the coil impedance to the attenuation. A current frequency for which the ratio of the antenna's resistive part of the impedance to the angular frequency of the current is substantially insensitive to at least one of the parameters is preferred.
摘要翻译： 本公开涉及确定通过导电材料的电磁信号的衰减。 提供天线并将其放置在相对靠近导电材料的位置。 交流电流通过天线，测量天线的阻抗。 使用测量的阻抗确定衰减。 可以进行单个频率测量，或者可以进行使用不同频率的多个测量。 基于材料性质和电流频率的分组参数用于将线圈阻抗与衰减相关联。 阻抗的电阻部分与电流的角频率的比率对于至少一个参数基本上不敏感的当前频率是优选的。
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8.发明申请CORRECTION FACTORS FOR ELECTROMAGNETIC MEASUREMENTS MADE THROUGH CONDUCTIVE MATERIAL 有权通过导电材料进行电磁测量的校正因子公开(公告)号：US20110012620A1
公开(公告)日：2011-01-20
申请号：US12641994
申请日：2009-12-18
申请人： Richard A. Rosthal , Hong Zhang , Cyrille Levesque , Guozhong Gao , H. Frank Morrison , David Alumbaugh
发明人： Richard A. Rosthal , Hong Zhang , Cyrille Levesque , Guozhong Gao , H. Frank Morrison , David Alumbaugh
IPC分类号： G01R27/28
CPC分类号： G01V3/28
摘要： The present disclosure relates to determining attenuation factors relating to an electromagnetic signal passing through, a conductive material seen by a real sensor. A sensor is provided and disposed proximate to the material. An alternating current is passed through the sensor and the impedance of the sensor is measured. The impedance of an ideal coil is obtained from the measured impedance using electromagnetic modeling combined with a circuit analysis of the coil impedance, and the attenuation factors for the real coil in straight or feedback mode are determined by electromagnetic modeling of casing attenuation factors and impedance of an ideal coil combined with equivalent circuit modeling of the sensor transfer functions. The attenuation factors seen by the real sensor may be determined in real-time or post-survey. The material may be magnetic or non-magnetic.
摘要翻译： 本公开涉及确定与通过真实传感器所看到的导电材料通过的电磁信号有关的衰减因子。 传感器被设置并靠近材料设置。 交流电流通过传感器，测量传感器的阻抗。 理想线圈的阻抗通过使用电磁建模与线圈阻抗的电路分析结合的测量阻抗获得，并且直线或反馈模式中的实线圈的衰减系数由壳体衰减因数和阻抗的电磁建模确定 理想的线圈结合传感器传递函数的等效电路建模。 真实传感器所看到的衰减因子可以在实时或后期测量中确定。 该材料可以是磁性或非磁性的。
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9.发明授权Correction factors for electromagnetic measurements made through conductive material 有权通过导电材料进行电磁测量的校正因子公开(公告)号：US08332191B2
公开(公告)日：2012-12-11
申请号：US12641994
申请日：2009-12-18
申请人： Richard A. Rosthal , Hong Zhang , Cyrille Levesque , Guozhong Gao , H. Frank Morrison , David Alumbaugh
发明人： Richard A. Rosthal , Hong Zhang , Cyrille Levesque , Guozhong Gao , H. Frank Morrison , David Alumbaugh
CPC分类号： G01V3/28
摘要： The present disclosure relates to determining attenuation factors relating to an electromagnetic signal passing through, a conductive material seen by a real sensor. A sensor is provided and disposed proximate to the material. An alternating current is passed through the sensor and the impedance of the sensor is measured. The impedance of an ideal coil is obtained from the measured impedance using electromagnetic modeling combined with a circuit analysis of the coil impedance, and the attenuation factors for the real coil in straight or feedback mode are determined by electromagnetic modeling of casing attenuation factors and impedance of an ideal coil combined with equivalent circuit modeling of the sensor transfer functions. The attenuation factors seen by the real sensor may be determined in real-time or post-survey. The material may be magnetic or non-magnetic.
摘要翻译： 本公开涉及确定与通过真实传感器所看到的导电材料通过的电磁信号有关的衰减因子。 传感器被设置并靠近材料设置。 交流电流通过传感器，测量传感器的阻抗。 理想线圈的阻抗通过使用电磁建模与线圈阻抗的电路分析结合的测量阻抗获得，并且直线或反馈模式中的实线圈的衰减系数由壳体衰减因数和阻抗的电磁建模确定 理想的线圈结合传感器传递函数的等效电路建模。 真实传感器所看到的衰减因子可以在实时或后期测量中确定。 该材料可以是磁性或非磁性的。
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公开(公告)号：US08310239B2
公开(公告)日：2012-11-13
申请号：US12581947
申请日：2009-10-20
申请人： Hong Zhang , Richard A. Rosthal
发明人： Hong Zhang , Richard A. Rosthal
IPC分类号： G01V3/10
摘要： A current sensor measures an electrical current flowing in well casing or other magnetic structure. The current sensor can be installed in a tool for performing electromagnetic (EM) induction surveying in a wellbore lined with an electrically conductive casing. The tool includes an EM element to transmit or receive a magnetic field through the casing. The measured current using the current sensor can be used to relate the change of casing effect on the EM element (e.g., an induction receiver) placed inside the well casing for performing the EM induction survey.
摘要翻译： 电流传感器测量在壳体或其他磁性结构中流动的电流。 电流传感器可以安装在用于在衬有导电外壳的井眼中进行电磁（EM）感应测量的工具中。 该工具包括用于通过壳体传送或接收磁场的EM元件。 使用电流传感器的测量电流可用于将套管效应的变化与放置在井套内的EM元件（例如，感应接收器）进行EM感应测量。
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