公开(公告)号：US08729893B2

公开(公告)日：2014-05-20

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： G01R33/563 ,  G01N24/08 ,  G01V3/14 ,  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。

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。

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。

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。

公开(公告)号：US08532929B2

公开(公告)日：2013-09-10

申请号：US12960062

申请日：2010-12-03

申请人： Lilong Li ,  Songhua Chen

发明人： Lilong Li ,  Songhua Chen

IPC分类号： G06F19/00 ,  G01V3/00

CPC分类号： G01V3/32

摘要： Pulse sequences are applied to a fluid in an earth formation with an external static magnetic field and NMR spin echo signals are obtained. The received NMR signals are affected by internal field gradients due to a contrast in magnetic susceptibility between the grains of the formation matrix and the fluid in the pore space. Processing of the data gives the relaxation time and diffusivity of the fluid.

摘要翻译： 脉冲序列用外部静磁场施加到地层中的流体，并获得NMR自旋回波信号。 由于形成基质的晶粒与孔隙空间中的流体之间的磁化率的对比，所接收的NMR信号受内部场梯度的影响。 数据的处理给出了流体的松弛时间和扩散系数。

公开(公告)号：US20110137567A1

公开(公告)日：2011-06-09

申请号：US12960062

申请日：2010-12-03

申请人： Lilong Li ,  Songhua Chen

发明人： Lilong Li ,  Songhua Chen

IPC分类号： G06F19/00 ,  G06G7/48

CPC分类号： G01V3/32

摘要： Pulse sequences are applied to a fluid in an earth formation with an external static magnetic field and NMR spin echo signals are obtained. The received NMR signals are affected by internal field gradients due to a contrast in magnetic susceptibility between the grains of the formation matrix and the fluid in the pore space. Processing of the data gives the relaxation time and diffusivity of the fluid.

摘要翻译： 脉冲序列用外部静磁场施加到地层中的流体，并获得NMR自旋回波信号。 由于形成基质的晶粒与孔隙空间中的流体之间的磁化率的对比，所接收的NMR信号受内部场梯度的影响。 数据的处理给出了流体的松弛时间和扩散系数。

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。

公开(公告)号：US07425827B2

公开(公告)日：2008-09-16

申请号：US11541227

申请日：2006-09-29

申请人： Songhua Chen ,  Carl M. Edwards ,  Thomas Kruspe ,  Martin Blanz ,  Holger F. Thern ,  David R. Beard

发明人： Songhua Chen ,  Carl M. Edwards ,  Thomas Kruspe ,  Martin Blanz ,  Holger F. Thern ,  David R. Beard

IPC分类号： G01V3/00

CPC分类号： G01V3/30 ,  G01V3/32

摘要： The quality factor of a NMR-antenna depends upon mud conductivity, formation resistivity and the borehole size. The Q of the antenna is measured. From measurement of one of formation conductivity or borehole size, the other can be determined.

摘要翻译： NMR天线的质量因素取决于泥浆导电性，地层电阻率和钻孔尺寸。 测量天线的Q值。 从测量地层导电率或钻孔尺寸之一，可以确定另一个。

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.

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。