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公开(公告)号：US07579841B2
公开(公告)日：2009-08-25
申请号：US11469859
申请日：2006-09-02
申请人： Luis E. San Martin , Humberto E. Rosa , Raj Pai , William J. Schaecher , Myrick L. Monroe , Marian L. Morys , Carl Dodge
发明人： Luis E. San Martin , Humberto E. Rosa , Raj Pai , William J. Schaecher , Myrick L. Monroe , Marian L. Morys , Carl Dodge
CPC分类号： G01V3/24
摘要： Oil-based mud imaging systems and methods having standoff compensation. In some embodiments, disclosed logging systems include a logging tool in communication with surface computing facilities. The logging tool is provided with a sensor array having at least two voltage electrodes positioned between two current electrodes energized by an excitation source to create an oscillatory electric field in a borehole wall. The two current electrodes are each shielded with conductive shields to prevent current leakage into the logging tool body. A common mode voltage is measured, and the phase and amplitude of the excitation source is controlled to reduce the difference between the common mode voltage and reference voltage of a voltage detector. The logging tool is further provided with electronics coupled to the voltage detector and the current electrodes to determine a differential voltage between the voltage electrodes and two current flows from separate ones of the current electrodes. From the differential voltage and multiple current flows, the computing facilities determine borehole wall resistivity, and may display the resistivity as a borehole wall image.
摘要翻译： 油基泥浆成像系统和方法具有间隙补偿。 在一些实施例中，公开的记录系统包括与表面计算设备通信的测井工具。 记录工具设置有传感器阵列，其具有位于两个电流电极之间的至少两个电压电极，两个电流电极由激励源激励以在井壁中产生振荡电场。 两个电流电极各自用导电屏蔽屏蔽，以防止电流泄漏到测井工具主体中。 测量共模电压，并且控制激励源的相位和幅度以减小电压检测器的共模电压和参考电压之间的差。 测井工具还设置有耦合到电压检测器和电流电极的电子器件，以确定电压电极之间的差分电压和来自分离的电流电极的两个电流。 从差分电压和多个电流流出，计算设备确定井壁电阻率，并可以将电阻率显示为井壁图像。
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公开(公告)号：US20080272789A1
公开(公告)日：2008-11-06
申请号：US12065292
申请日：2006-11-06
IPC分类号： G01V3/26
CPC分类号： G01V3/24
摘要： Oil-based mud imaging systems and methods that measure formation permittivity. In some embodiments, disclosed logging systems include a logging tool in communication with surface computing facilities. The logging tool is provided with a sensor array having at least two voltage electrodes positioned between at least two current electrodes that create an electric field in a borehole wall, and is further provided with electronics coupled to the voltage electrodes to determine a differential voltage magnitude and phase. From the magnitude and phase, formation resistivity and permittivity measurements can be determined and used to construct a borehole wall image.
摘要翻译： 石油泥浆成像系统和测量地层介电常数的方法。 在一些实施例中，公开的记录系统包括与表面计算设备通信的测井工具。 记录工具设置有传感器阵列，其具有位于至少两个电流电极之间的至少两个电压电极，其在井壁中产生电场，并且还设置有耦合到电压电极的电子线以确定差分电压幅度，以及 相。 从大小和相位来看，可以确定地层电阻率和介电常数测量结果，并用于构造井壁图像。
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公开(公告)号：US10302797B2
公开(公告)日：2019-05-28
申请号：US14409890
申请日：2012-07-12
申请人： Shanjun Li , Luis E. San Martin , Burkay Donderici
发明人： Shanjun Li , Luis E. San Martin , Burkay Donderici
摘要： A system and method for improving the accuracy of galvanic tool measurements is described. The system (300) may include a survey electrode (A0) and a first monitor electrode (M1′) positioned above the survey electrode. A second monitor electrode (M1) may be positioned below the survey electrode, and a first conductive wire (307) may couple the first monitor electrode to the second monitor electrode. A first measurement point (302) may be located on the conductive wire, and a first resistive element (Rm1) may be coupled to the conductive wire.
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公开(公告)号：US09910180B2
公开(公告)日：2018-03-06
申请号：US14411500
申请日：2012-06-29
CPC分类号： G01V3/20 , E21B19/22 , E21B47/0905 , E21B47/12 , E21B47/124 , G01V3/02 , G01V3/108 , G01V3/28 , G01V3/38
摘要： Various systems and methods for implementing and using a full tensor micro-impedance downhole imaging tool that includes downhole emitters that induce, at azimuthally-spaced positions on a borehole wall, fields having components in three different non-coplanar directions within a formation and directionally sensitive downhole sensors that sense the components caused by each emitter. The tool further includes a downhole controller that processes signals received from the directionally sensitive downhole sensors to provide a set of measurements representative of a 3×3 impedance tensor at each position.
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公开(公告)号：US09562987B2
公开(公告)日：2017-02-07
申请号：US14111963
申请日：2011-04-18
摘要： Disclosed herein are multicomponent borehole radar tools and methods. At least some tool embodiments employ at least two antennas that receive reflections of electromagnetic pulses transmitted from the tool. A processor processes the receive signals to identify reflection signals and to determine a direction and/or distance to the sources of the reflection signals. Possible sources include formation boundaries, fluid boundaries, cased wells, and other features that cause contrasts in electromagnetic properties. In addition to reflection signals, the measured responses may include direct signal measurements that are useful for determining formation resistivity and permittivity. Each of the antennas may transmit and receive, and they may be collocated to reduce tool size and reduce processing complexity. Disclosed logging tool examples employ both electric and magnetic dipole antennas.
摘要翻译： 这里公开了多组分钻孔雷达工具和方法。 至少一些工具实施例采用接收从工具传送的电磁脉冲的反射的至少两个天线。 处理器处理接收信号以识别反射信号并确定与反射信号源的方向和/或距离。 可能的来源包括地层边界，流体边界，套管井以及引起电磁特性对比的其他特征。 除了反射信号之外，所测量的响应可以包括用于确定地层电阻率和介电常数的直接信号测量。 每个天线可以发送和接收，并且它们可以并置以减少工具尺寸并降低处理复杂性。 公开的测井工具示例采用电偶极天线和磁偶极天线。
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公开(公告)号：US20140244175A1
公开(公告)日：2014-08-28
申请号：US14349872
申请日：2011-10-06
IPC分类号： G01V3/38
CPC分类号： G01V3/38 , G01V1/42 , G01V3/18 , G01V11/00 , G01V2210/30 , G01V2210/66
摘要： A method and system to compensate for inaccuracies in crosswell tomography is presented. The method includes obtaining data from at least two receivers in response to transmissions from at least two transmitters. Next, at least one compensated value is derived based on the responses of the receivers to the transmitters. Finally, an inversion is performed based at least in part on the compensated value derived. This method eliminates inaccuracies that can be caused by sensor gain and phase variations in the inversion process. Inversion results with gain and phase compensation produce better imaging results that can better help determine the shape and boundaries of the reservoir.
摘要翻译： 介绍了一种补偿横贯层析成像不准确的方法和系统。 该方法包括响应于来自至少两个发射机的传输，从至少两个接收机获得数据。 接下来，基于接收机对发射机的响应，导出至少一个补偿值。 最后，至少部分地基于导出的补偿值来执行反转。 该方法消除了反演过程中传感器增益和相位变化可能引起的不准确。 具有增益和相位补偿的反演结果产生更好的成像结果，可以更好地帮助确定储层的形状和边界。
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公开(公告)号：US20140159731A1
公开(公告)日：2014-06-12
申请号：US14237674
申请日：2011-08-10
申请人： Evan L. Davies , Luis E. San Martin
发明人： Evan L. Davies , Luis E. San Martin
IPC分类号： G01V3/30
摘要： A logging tool and method for winding a multi-component induction (MCI) antenna is presented. The method eliminates unwanted dipole signals that are created by the voltage drop that takes place in the transmitter. The antenna is made of at least two parts physically separated, one on each side of the mandrel. The winding method is performed in a way that creates at least four windings arranged to eliminate dipole signals attributable to an asymmetric voltage distribution. The midpoint of the conductive wire that for is the antenna windings may be electrically attached to the tool body. This method is suitable for the winding of the cross-components X and Y of the MCI coil arrays.
摘要翻译： 提出了一种用于卷绕多分量感应（MCI）天线的测井工具和方法。 该方法消除了由发射器中发生的电压降产生的不需要的偶极子信号。 天线由物理分离的至少两个部分制成，一个在心轴的每一侧。 卷绕方法以产生至少四个绕组排列的方式进行，以消除归因于不对称电压分布的偶极子信号。 作为天线绕组的导线的中点可以电连接到工具主体。 该方法适用于MCI线圈阵列的交叉分量X和Y的绕组。
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38.发明授权Virtual steering of induction tool attenuation and phase difference measurements 有权感应工具衰减和相位差测量的虚拟转向公开(公告)号：US08296113B2
公开(公告)日：2012-10-23
申请号：US09861314
申请日：2001-05-18
申请人： Luis E. San Martin
发明人： Luis E. San Martin
CPC分类号： G01V3/28 , E21B47/02216
摘要： An apparatus and method that provide steerable measurements of attenuation and phase difference are disclosed. In a preferred embodiment, a logging tool is provided with two triads of orthogonal receivers and a triad of orthogonal transmitters. A controller in the logging tool fires selected transmitters singly and in pairs, and determines measurements of ratios between signals received by the receiver triads. The measurement of sixteen ratios is sufficient to allow determination of attenuation and phase difference that would be measured by virtually steered receivers according to equations provided herein.
摘要翻译： 公开了提供可控衰减和相位差测量的装置和方法。 在优选实施例中，测井工具设置有两个正交接收器的三元组和正交发射器的三元组。 记录工具中的控制器单独和成对地触发所选发射器，并确定接收器三元组接收的信号之间的比率的测量。 十六比的测量足以允许根据本文提供的等式来确定由实际转向接收机测量的衰减和相位差。
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公开(公告)号：US07046112B2
公开(公告)日：2006-05-16
申请号：US10764781
申请日：2004-01-26
申请人： Evan L. Davies , Luis E. San Martin
发明人： Evan L. Davies , Luis E. San Martin
IPC分类号： H01F27/30
CPC分类号： H04B5/0075 , H01F5/02 , H01F27/325 , H01F41/098 , H01F2038/143 , H04B5/02
摘要： The present invention is directed to a logging tool induction coil form having a coating layer, which is easy to form to tight tolerances, bonded to at least a portion of the outer surface of the ceramic hollow cylindrical core. A plurality of parallel circumferential grooves are machined into the coating layer. Since the coating material is easy to machine, the parallel circumferential grooves can be machined to the tight tolerances needed in logging applications at a fraction of the time and cost of machining ceramic-only forms.
摘要翻译： 本发明涉及一种测井工具感应线圈形式，其具有易于形成为严格公差的涂层，其结合到陶瓷中空圆柱形芯的外表面的至少一部分上。 多个平行的圆周槽被加工到涂层中。 由于涂层材料容易加工，平行的周向槽可以在加工仅陶瓷形式的时间和成本的几分之一时间内加工成在测井应用中所需的严格公差。
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