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    NMR Flow Metering Using Velocity Selection and Remote Detection
    1.
    发明申请
    NMR Flow Metering Using Velocity Selection and Remote Detection 有权
    使用速度选择和远程检测的NMR流量计

    公开(公告)号：US20120092007A1

    公开(公告)日：2012-04-19

    申请号：US12971740

    申请日：2010-12-17

    申请人： Lilong Li ,  Songhua Chen ,  Carl M. Edwards

    发明人： Lilong Li ,  Songhua Chen ,  Carl M. Edwards

    IPC分类号： G01R33/44 ,  G01F1/56

    CPC分类号： G01N24/081 ,  G01F1/716 ,  G01F1/74 ,  G01N24/082 ,  G01R33/445

    摘要： A method and apparatus for estimating a flow rate of a phase of a multiphase fluid is disclosed. In the first method, nuclei in the fluid are polarized over two distances and a measured magnetization gives the relative fraction of two components of the fluid for a selected velocity. In the second method, nuclei in the fluid are polarized over a specified distance and measurements of the decay of spin echo signals is used to give the relative fraction of two components of the fluid for the selected velocity.

    摘要翻译： 公开了一种用于估计多相流体的相的流量的方法和装置。 在第一种方法中，流体中的核在两个距离上被极化，并且测量的磁化给出了所选流速的流体的两个分量的相对分数。 在第二种方法中，流体中的核在一定距离上被极化，并且使用自旋回波信号衰减的测量值来给出所选速度的流体的两个分量的相对分数。

    NMR flow metering using velocity selection and remote detection
    3.
    发明授权
    NMR flow metering using velocity selection and remote detection 有权
    使用速度选择和远程检测的NMR流量计

    公开(公告)号：US08633689B2

    公开(公告)日：2014-01-21

    申请号：US12971740

    申请日：2010-12-17

    申请人： Lilong Li ,  Songhua Chen ,  Carl M. Edwards

    发明人： Lilong Li ,  Songhua Chen ,  Carl M. Edwards

    IPC分类号： G01V3/00

    CPC分类号： G01N24/081 ,  G01F1/716 ,  G01F1/74 ,  G01N24/082 ,  G01R33/445

    摘要： A method and apparatus for estimating a flow rate of a phase of a multiphase fluid is disclosed. In the first method, nuclei in the fluid are polarized over two distances and a measured magnetization gives the relative fraction of two components of the fluid for a selected velocity. In the second method, nuclei in the fluid are polarized over a specified distance and measurements of the decay of spin echo signals is used to give the relative fraction of two components of the fluid for the selected velocity.

    摘要翻译： 公开了一种用于估计多相流体的相的流量的方法和装置。 在第一种方法中，流体中的核在两个距离上被极化，并且测量的磁化给出了所选流速的流体的两个分量的相对分数。 在第二种方法中，流体中的核在一定距离上被极化，并且使用自旋回波信号衰减的测量值来给出所选速度的流体的两个分量的相对分数。

    Multiphase Flow Measurement Using Nuclear Magnetic Resonance
    4.
    发明申请
    Multiphase Flow Measurement Using Nuclear Magnetic Resonance 有权
    使用核磁共振的多相流测量

    公开(公告)号：US20120092006A1

    公开(公告)日：2012-04-19

    申请号：US12907707

    申请日：2010-10-19

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

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

    IPC分类号： G01R33/44

    CPC分类号： G01R33/56308 ,  G01N24/081 ,  G01N24/082 ,  G01R33/445 ,  G01R33/563 ,  G01V3/14

    摘要： 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.

    摘要翻译： 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。

    Objective oriented methods for NMR log acquisitions for estimating earth formation and fluid properties
    5.
    发明授权
    Objective oriented methods for NMR log acquisitions for estimating earth formation and fluid properties 有权
    用于估算地层和流体性质的NMR测井采集的面向目标的方法

    公开(公告)号：US06972564B2

    公开(公告)日：2005-12-06

    申请号：US10288115

    申请日：2002-11-05

    申请人： Songhua Chen ,  Carl M. Edwards

    发明人： Songhua Chen ,  Carl M. Edwards

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

    CPC分类号： G01N24/081 ,  G01V3/32

    摘要： 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.

    摘要翻译： 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。

    NMR tracking of injected fluids
    7.
    发明授权
    NMR tracking of injected fluids 有权

    公开(公告)号：US09658359B2

    公开(公告)日：2017-05-23

    申请号：US14131815

    申请日：2011-07-12

    申请人： Ron Dirksen ,  Songhua Chen

    发明人： Ron Dirksen ,  Songhua Chen

    IPC分类号： G01V3/00 ,  G01V3/32 ,  E21B43/26 ,  E21B49/00

    CPC分类号： G01V3/32 ,  E21B43/26 ,  E21B49/008

    摘要： Formation testing systems and methods may inject fluids into a formation to initiate fractures and facilitate measurements of various formation properties. In accordance with certain disclosed embodiments, the injection tools are further provided with nuclear magnetic resonance (NMR) sensors to monitor the injected fluids and provide measurements of near-borehole fracture orientations and volumes. Contrast agents and/or magnetic resonance imaging (MRI) techniques may be employed. The fluid injection may occur via an extendible isolation pad, via a fracturing jet, or via an injection port in an isolated region of the borehole. The systems may employ pressure monitoring in conjunction with the NMR sensors to further enhance estimates of formation and fracture properties.

    NMR contrast logging
    8.
    发明授权
    NMR contrast logging 失效
    NMR对比测井

    公开(公告)号：US08610431B2

    公开(公告)日：2013-12-17

    申请号：US13012929

    申请日：2011-01-25

    申请人： Songhua Chen ,  Daniel Georgi

    发明人： Songhua Chen ,  Daniel Georgi

    IPC分类号： G01V3/00

    CPC分类号： G01V3/32

    摘要： An apparatus for estimating a property of an earth formation penetrated by a borehole, the apparatus includes: a carrier configured to be conveyed through the borehole; a nuclear magnetic resonance (NMR) instrument disposed at the carrier and configured to perform an NMR measurement on a volume sensitive to the NMR measurement; and a contrast agent disposed in the volume and comprising particles that form a suspension in a liquid, the suspension of particles being configured increase a magnetic field gradient of at least one earth formation material in the volume to change an NMR relaxation time constant of the at least one earth formation material; wherein the NMR measurement on the volume containing the at least one earth formation material and the contrast agent is used to estimate the property.

    摘要翻译： 一种用于估计由钻孔穿透的地层的性质的装置，所述装置包括：构造成被输送通过所述钻孔的载体; 设置在载体上并被配置为对对NMR测量敏感的体积进行NMR测量的核磁共振（NMR）仪器; 以及设置在体积中并包含在液体中形成悬浮液的颗粒的造影剂，构造的颗粒悬浮液增加体积中的至少一种地球形成材料的磁场梯度，以改变在该体积中的NMR弛豫时间常数 至少一个地层材料; 其中使用包含至少一种地球形成材料和造影剂的体积上的NMR测量来估计该性质。

    Method of determining downhole formation grain size distribution using acoustic and NMR logging data
    9.
    发明授权
    Method of determining downhole formation grain size distribution using acoustic and NMR logging data 有权
    使用声学和NMR测井数据确定井下形成粒度分布的方法

    公开(公告)号：US08195399B2

    公开(公告)日：2012-06-05

    申请号：US12053988

    申请日：2008-03-24

    申请人： Mikhail N. Gladkikh ,  Songhua Chen ,  Jiansheng Chen

    发明人： Mikhail N. Gladkikh ,  Songhua Chen ,  Jiansheng Chen

    IPC分类号： G01V1/40 ,  G01V3/38

    CPC分类号： G01V11/00 ,  G01V3/32 ,  G01V5/04

    摘要： The grain size distribution of a pore-scale geometric model of a clastic earth formation are adjusted so that the NMR relaxation time distribution output of the model matches a measured NMR distribution, and an acoustic velocity output of the model matches a measured acoustic velocity (compressional and/or shear). Fluid drainage and imbibing can be simulated. Additional properties of the earth formation are predicted using the pore-scale model. The additional properties may be based on additional measurements of properties of a fluid in the formation.

    摘要翻译： 调整碎屑岩地层的孔隙尺度几何模型的粒度分布，使得模型的NMR弛豫时间分布输出与测量的NMR分布相匹配，并且模型的声速输出与测得的声速匹配（压缩 和/或剪切）。 可以模拟流体排水和吸水。 使用孔隙尺度模型预测地层的附加属性。 额外的性质可以基于地层中流体的性质的附加测量。