公开(公告)号：US08720286B2

公开(公告)日：2014-05-13

申请号：US12939280

申请日：2010-11-04

Applicant: Carl M. Edwards ,  Dustin Carr

Inventor： Carl M. Edwards ,  Dustin Carr

IPC: G01L1/08

CPC classification number: E21B47/011

Abstract: An apparatus and method for estimating a parameter of interest using a force responsive element comprising, at least in part, a balanced material. The balanced material is temperature insensitive over a specified range of temperatures such that the force responsive element may estimate the parameter of interest by responding to a desired force with relatively little interference due to temperature changes within the specified range of temperatures.

Abstract translation: 一种用于使用力响应元件估计感兴趣参数的装置和方法，该力响应元件至少部分地包括平衡材料。 平衡材料在特定的温度范围内是温度不敏感的，使得力响应元件可以通过响应期望的力来估计感兴趣的参数，由于在指定温度范围内的温度变化具有相对较小的干扰。

公开(公告)号：US20120092006A1

公开(公告)日：2012-04-19

申请号：US12907707

申请日：2010-10-19

Applicant: Lilong Li ,  Songhua Chen ,  Carl M. Edwards ,  Joo Tim Ong

Inventor： Lilong Li ,  Songhua Chen ,  Carl M. Edwards ,  Joo Tim Ong

IPC: G01R33/44

CPC classification number: G01R33/56308 ,  G01N24/081 ,  G01N24/082 ,  G01R33/445 ,  G01R33/563 ,  G01V3/14

Abstract: A method and apparatus for estimating a flow rate of a phase of a multiphase fluid is disclosed. A first velocity distribution is obtained for a first set of nuclei in the fluid from a Nuclear Magnetic Resonance (NMR) signal received for the fluid in response to a first NMR excitation signal. A second velocity distribution is obtained for a second set of nuclei in the fluid from an NMR signal received for the fluid in response to a second NMR excitation signal. A velocity of the phase is estimated from the first velocity distribution and the second velocity distribution. The flow rate of the phase is estimated using the estimated velocity of the phase and an estimated volume fraction of the phase.

Abstract translation: 公开了一种用于估计多相流体的相的流量的方法和装置。 对于针对第一个NMR激发信号的流体接收的核磁共振（NMR）信号，对于流体中的第一组核获得第一速度分布。 从针对第二次NMR激发信号的流体接收到的NMR信号，获得流体中第二组核的第二速度分布。 从第一速度分布和第二速度分布估计相位的速度。 使用相的估计速度和相的估计体积分数来估计相的流速。

公开(公告)号：US08131494B2

公开(公告)日：2012-03-06

申请号：US12328181

申请日：2008-12-04

Applicant: Daniel T. Georgi ,  Carl M. Edwards ,  Sheng Fang ,  Rocco DiFoggio ,  Robert A. Estes

Inventor： Daniel T. Georgi ,  Carl M. Edwards ,  Sheng Fang ,  Rocco DiFoggio ,  Robert A. Estes

IPC: G01R35/00

CPC classification number: G01P15/093 ,  G01P15/18 ,  G01P21/00 ,  G01P2015/0814 ,  G01V7/00

Abstract: A method to correct for a systematic error of a sensor having a plurality of accelerometers configured to measure gravitational acceleration, the method including: rotating the plurality of accelerometers about a first axis; obtaining a first set of calibration measurements from the plurality of accelerometers from the rotation about the first axis; determining a first systematic error for each accelerometer in the plurality using the first set of calibration measurements; and removing the first systematic error from sensor measurements to correct for the systematic error.

Abstract translation: 一种用于校正具有被配置为测量重力加速度的多个加速度计的传感器的系统误差的方法，所述方法包括：围绕第一轴旋转所述多个加速度计; 从围绕第一轴的旋转获得来自多个加速度计的第一组校准测量; 使用所述第一组校准测量来确定所述多个中的每个加速度计的第一系统误差; 并从传感器测量中去除第一个系统误差，以纠正系统误差。

公开(公告)号：US07116103B2

公开(公告)日：2006-10-03

申请号：US10967733

申请日：2004-10-18

Applicant: Carl M. Edwards ,  Daniel T. Georgi

Inventor： Carl M. Edwards ,  Daniel T. Georgi

IPC: G01V3/00

CPC classification number: G01N24/081 ,  G01V3/32

Abstract: A method of evaluating a characteristic of a fluid in a region, and a nuclear magnetic resonance (NMR) well logging apparatus for the implementation thereof, is disclosed. A magnetic field gradient is applied to the region, and first and second sequences of magnetic field gradient is applied to the region, with the second sequence differing in a pulse characteristic from the first sequence. A magnetization spectrum resulting from each of the sequences of pulse is captured, and a change in the magnetization spectrum resulting from the first and second sequences of pulses is analyzed to extract information about the fluid.

Abstract translation: 公开了一种评价区域中的流体的特性的方法和用于实施的核磁共振（NMR）测井装置。 对该区域施加磁场梯度，并且将第一和第二磁场梯度序列施加到该区域，其中第二序列与来自第一序列的脉冲特性不同。 捕获从每个脉冲序列产生的磁化谱，并且分析由第一和第二脉冲序列产生的磁化谱的变化以提取关于流体的信息。

公开(公告)号：US06972564B2

公开(公告)日：2005-12-06

申请号：US10288115

申请日：2002-11-05

Applicant: Songhua Chen ,  Carl M. Edwards

Inventor： Songhua Chen ,  Carl M. Edwards

IPC: G01R33/44 ,  G01V3/32 ,  G01V3/00

CPC classification number: G01N24/081 ,  G01V3/32

Abstract: An objective oriented NMR logging method selects pulse sequences over a plurality of frequencies from a set of building blocks. The building blocks include trainlet sequences wherein each trainlet comprises an excitation pulse and a plurality of refocusing pulses, the total length of a trainlet being typically less than 10 ms. Another building block is a short CPMG or modified CPMG sequence and yet another building block is a regular CPMG or modified CPMG sequence. The modified CPMG sequences may have refocusing pulses with a tipping angle less than 180° to reduce the power consumption. Based on the logging objective (formation evaluation or FE, FE plus hydrocarbon typing, FE plus gas evaluation) the building blocks are combined at a plurality of frequencies with different wait times and TEs.

Abstract translation: 一种面向目标的NMR测井方法从一组结构单元中选择多个频率上的脉冲序列。 构建块包括列车序列，其中每个列车包括激励脉冲和多个重新聚焦脉冲，列车的总长度通常小于10ms。 另一个构建块是短CPMG或修改CPMG序列，而另一个构建块是常规CPMG或修改CPMG序列。 修改的CPMG序列可以具有小于180°的倾翻角的重聚焦脉冲以降低功耗。 基于测井目标（地层评估或FE，FE加烃类型，FE加气评估），构建块以不同的等待时间和TE的多个频率组合。

公开(公告)号：US06720765B2

公开(公告)日：2004-04-13

申请号：US09870287

申请日：2001-05-30

Applicant: Carl M. Edwards ,  Daniel T. Georgi

Inventor： Carl M. Edwards ,  Daniel T. Georgi

IPC: G01V300

CPC classification number: G01V3/32 ,  G01N24/081 ,  G01R33/383 ,  Y02A90/344

Abstract: Wireline NMR well logging measurements suffer from disadvantages of poor vertical resolution, logging speeds less than 20 ft/min, and power consumption in excess of 200 W. In spite of these disadvantages, NMR well logging is used because it is capable of providing estimates for a number of petrophysical parameters that are difficult to obtain from other wireline data. These include estimates of the bulk volume irreducible (BVI) of fluids in the formation. The present invention targets BVI and clay bound water (CBW) measurements. Logging speeds of up to 60 ft/min are attainable with little or no loss of resolution. In one preferred embodiment, the tool has four sensors circumferentially distributed around the logging tool and in contact with the borehole wall. A horseshoe like magnet is used to generate the static magnetic field. The magnet poles are designed such that the magnetic field is uniform perpendicular tool motion, as well as provide a sufficiently large extent of the static field to provide polarization for bound water in rock formations. The RF portion of the sensor is comprised of at least one coil configured for transmission of an RF magnetic field into rock formations and at least two coils configured to separately receive the NMR signal from the formation. In another embodiment a coil is wound around the pole pieces or the iron yoke for the purpose of field shifting to enable acquisition of phase-alternated measurements.

Abstract translation: 有线NMR测井测量具有不良的垂直分辨率，测井速度小于20英尺/分钟，功耗超过200W的缺点。尽管存在这些缺点，但是使用NMR测井是因为它能够为 一些难以从其他有线数据获得的岩石物理参数。 这些包括地层中流体的体积不可约（BVI）的估计。 本发明针对BVI和粘土结合水（CBW）测量。 记录速度高达60英尺/分，可以很少或没有损失分辨率。 在一个优选实施例中，该工具具有围绕测井工具周向分布且与钻孔壁接触的四个传感器。 使用马蹄形磁铁来产生静磁场。 磁极被设计成使得磁场是均匀的垂直的工具运动，并且提供足够大的静态场的范围以为岩层中的结合水提供极化。 传感器的RF部分包括至少一个线圈，其被配置为将RF磁场传输到岩层中，并且至少两个线圈被配置成从地层分别接收NMR信号。 在另一个实施例中，线圈缠绕在极片或铁轭上，用于场移位以使得能够获取相位交替测量。

公开(公告)号：US5585720A

公开(公告)日：1996-12-17

申请号：US546742

申请日：1995-10-23

Applicant: Carl M. Edwards

Inventor： Carl M. Edwards

IPC: G01R33/44 ,  G01R33/46 ,  G01R33/48

CPC classification number: G01R33/4625

Abstract: A method of reducing bias error in nuclear magneic resonance (NMR) spin-echo signals. The method includes filtering the signals using a filter having a bandwidth inversely related to the length of time from the initiation of the measurement of the NMR signals. In a preferred embodiment, the NMR spin-echo signal measurements are filtered using a moving average filter having an averaging span which increases with respect to the time elapsed from initiation of the spin-echo measurement sequence.

Abstract translation: 一种降低核磁共振（NMR）自旋回波信号偏移误差的方法。 该方法包括使用具有与从NMR信号测量开始开始的时间长度成反比的带宽的滤波器对信号进行滤波。 在优选实施例中，使用具有相对于自旋回波测量序列开始所经过的时间而增加的平均跨度的移动平均滤波器来过滤NMR自旋回波信号测量。

公开(公告)号：US11460600B2

公开(公告)日：2022-10-04

申请号：US17015872

申请日：2020-09-09

Applicant: Carl M. Edwards ,  Marc Stephen Ramirez ,  Otto Fanini ,  Stanislav Forgang

Inventor： Carl M. Edwards ,  Marc Stephen Ramirez ,  Otto Fanini ,  Stanislav Forgang

IPC: G01V3/32 ,  G01R33/38 ,  G01R33/34 ,  G01R33/36 ,  G01R33/383

Abstract: An apparatus for performing a nuclear magnetic resonance (NMR) measurement in a borehole penetrating a subsurface formation includes an NMR tool having an outside diameter that is less than an inside diameter of a drill tubular disposed in the borehole, the drill tubular having an opening at the distal end of the drill tubular leading into the borehole, and a retaining device configured to allow at least a section of the NMR tool to protrude through the opening of the drill tubular and prevent an unrestrained release of the NMR tool through the opening. The apparatus also includes a transmitter antenna and a receiver antenna coupled to the NMR tool, wherein the transmitter antenna and/or the receiver antenna are extendable from the NMR tool.

公开(公告)号：US20170343697A1

公开(公告)日：2017-11-30

申请号：US15166717

申请日：2016-05-27

Applicant: Marc S. Ramirez ,  Carl M. Edwards ,  Stanislav W. Forgang ,  Babak Kouchmeshky

Inventor： Marc S. Ramirez ,  Carl M. Edwards ,  Stanislav W. Forgang ,  Babak Kouchmeshky

IPC: G01V3/32 ,  G01R33/34

CPC classification number: G01V3/32 ,  G01N24/081 ,  G01R33/34046 ,  G01R33/3415 ,  G01R33/365 ,  G01R33/3808 ,  G01R33/383

Abstract: A nuclear magnetic resonance apparatus for estimating properties of an earth formation includes a carrier configured to be deployed in a borehole in the earth formation and at least one transmitting assembly disposed in the carrier and configured to generate an oscillating magnetic field in a volume of interest within the earth formation. The apparatus also includes at least one receiving assembly disposed in the carrier and configured to detect a nuclear magnetic resonance (NMR) signal originating in the volume of interest. In this apparatus, the receiving assembly includes at least a first longitudinal region with a loop coil and a butterfly coil, the loop coil central axis being located over a region of the magnet assembly where a static magnetic field is predominantly along an azimuthal direction to the carrier and the butterfly coil being at least partially overlapped with the loop coil to reduce mutual coupling.

公开(公告)号：US09645277B2

公开(公告)日：2017-05-09

申请号：US13765414

申请日：2013-02-12

Applicant: Carl M. Edwards ,  Jinhong Chen

Inventor： Carl M. Edwards ,  Jinhong Chen

IPC: G01V3/00 ,  G01V3/32 ,  G01R33/20 ,  G01N24/08

CPC classification number: G01V3/32 ,  G01N24/081 ,  G01R33/20

Abstract: A method for estimating a property of subsurface material includes extracting a sample of the material using a downhole formation tester and performing a plurality of nuclear magnetic resonance (NMR) measurements on a sensitive volume in the sample where each measurement in the plurality is performed in a static homogeneous magnetic field with a pulsed magnetic field gradient that is different in magnitude from other NMR measurements to provide a waveform signal. The method further includes transforming each received waveform signal from a time domain into a frequency domain and comparing the frequency domain signal to a reference to provide proton chemical-shift information related to a chemical property of one or more molecules in the sample and transforming the frequency domain signals into a complex number domain that quantifies waveform signal amplitude changes to provide one or more diffusion rates with each diffusion rate being associated with a corresponding frequency.