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公开(公告)号：US06570381B1
公开(公告)日：2003-05-27
申请号：US09276049
申请日：1999-03-25
IPC分类号： G01V300
CPC分类号： G01V3/32 , G01N24/081
摘要： The present invention relates generally to a nuclear magnetic resonance apparatus and method for substantially eliminating the effects of phase coherent acoustic ringing in borehole logging. A series of cycles of measurement pulse sequences are applied to the formation surrounding the borehole. Each pulse sequence includes an RF excitation pulse and several RF refocusing pulses. Spin echoes are received that contain spurious ringing signals from the excitation and refocusing pulses. Spin echo signals from corresponding spin echoes of each cycle are combined and substantially cancel the spurious ringing from the excitation and refocusing pulses of the pulse sequences.
摘要翻译： 本发明一般涉及一种用于基本消除井眼测井中的相位相干声环的影响的核磁共振装置和方法。 将测量脉冲序列的一系列循环应用于围绕钻孔的地层。 每个脉冲序列包括一个RF激励脉冲和几个RF重聚焦脉冲。 接收到包含来自激发和重聚焦脉冲的杂散振铃信号的自旋回波。 来自每个周期的相应自旋回波的旋转回波信号被组合，并且基本上抵消来自脉冲序列的激发和重聚焦脉冲的杂散振铃。
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公开(公告)号：US06492809B1
公开(公告)日：2002-12-10
申请号：US09205965
申请日：1998-12-04
IPC分类号： G01V300
CPC分类号： G01V3/32 , G01N24/081
摘要： A method and an apparatus for obtaining NMR measurements are disclosed. An NMR measurement apparatus, the measured sample, or both elements may be subjected to motion during the measurement. The envelope of an RF carrier signal is modulated according to an envelope to generate a first sequence of RF pulses. The envelope, the phase of the RF signal, and/or a static magnetic field may be varied during the radiation of the first sequence to substantially saturate a first region of the sample. The first sequence may include additional RF refocusing pulses that, when coupled with movement of the NMR measurement apparatus or sample, may also be used to substantially saturate the first region. A second sequence of RF pulses is radiated to establish a resonance region within the first region and measure an attribute of the sample.
摘要翻译： 公开了一种用于获得NMR测量的方法和装置。 NMR测量装置，测量的样品或两个元件可以在测量期间进行运动。 RF载波信号的包络根据包络被调制以产生第一序列的RF脉冲。 可以在第一序列的辐射期间改变包络线，RF信号的相位和/或静态磁场，以使样本的第一区域基本上饱和。 第一序列可以包括附加的RF重聚焦脉冲，当与NMR测量装置或样品的移动相结合时，也可以使其用于基本饱和第一区域。 辐射第二序列的RF脉冲以在第一区域内建立共振区域并测量样品的属性。
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3.发明授权Preconditioning spins near a nuclear magnetic resonance region in a borehole 有权在钻孔中的核磁共振区域附近进行预处理旋转公开(公告)号：US06844728B2
公开(公告)日：2005-01-18
申请号：US10197780
申请日：2002-07-18
CPC分类号： G01V3/32 , G01N24/081
摘要： A method and an apparatus for obtaining NMR measurements are disclosed. An NMR measurement apparatus, the measured sample, or both elements may be subjected to motion during the measurement. The envelope of an RF carrier signal is modulated according to an envelope to generate a first sequence of RF pulses. The envelope, the phase of the RF signal, and/or a static magnetic field may be varied during the radiation of the first sequence to substantially saturate a first region of the sample. The first sequence may include additional RF refocusing pulses that, when coupled with movement of the NMR measurement apparatus or sample, may also be used to substantially saturate the first region. A second sequence of RF pulses is radiated to establish a resonance region within the first region and measure an attribute of the sample.
摘要翻译： 公开了一种用于获得NMR测量的方法和装置。 NMR测量装置，测量的样品或两个元件可以在测量期间进行运动。 RF载波信号的包络根据包络被调制以产生第一序列的RF脉冲。 可以在第一序列的辐射期间改变包络线，RF信号的相位和/或静态磁场，以使样本的第一区域基本上饱和。 第一序列可以包括附加的RF重聚焦脉冲，当与NMR测量装置或样品的移动相结合时，也可以使其用于基本饱和第一区域。 辐射第二序列的RF脉冲以在第一区域内建立共振区域并测量样品的属性。
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4.发明授权Nuclear magnetic resonance logging with azimuthal resolution using gradient coils 有权使用梯度线圈的方位角分辨率进行核磁共振测井公开(公告)号：US06326784B1
公开(公告)日：2001-12-04
申请号：US09186951
申请日：1998-11-05
IPC分类号： G01V300
CPC分类号： G01V3/32 , G01N24/081 , G01R33/385
摘要： The present invention relates generally to an apparatus and method for obtaining an azimuthally resolved nuclear magnetic resonance measurement of an earth formation traversed by a borehole. The measurement can be made while drilling or using a wireline tool. At least one gradient coil is positioned circumferentially around the tool. A magnetic field is produced by the coil in a region of the formation facing the coil. The magnetic field is substantially parallel to the static magnetic field produced by a pair of permanent magnets which form a part of the tool. The additional field causes an additional phase shift for spins located in the region so that the spins subjected to the additional field do not form a spin-echo.
摘要翻译： 本发明一般涉及一种用于获得由钻孔穿过的地层的方位解析核磁共振测量的装置和方法。 可以在钻孔或使用有线工具时进行测量。 至少一个梯度线圈围绕工具周向定位。 在面向线圈的地层的区域中，线圈产生磁场。 磁场基本上平行于形成工具的一部分的一对永磁体产生的静磁场。 附加场引起位于该区域中的自旋的附加相移，使得经受附加场的自旋不形成自旋回波。
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公开(公告)号：US06373248B1
公开(公告)日：2002-04-16
申请号：US09644930
申请日：2000-08-23
申请人： Martin E. Poitzsch , Peter Speier , Krishnamurthy Ganesan , Shu-Kong Chang , Jaideva C. Goswami
发明人： Martin E. Poitzsch , Peter Speier , Krishnamurthy Ganesan , Shu-Kong Chang , Jaideva C. Goswami
IPC分类号： G01V300
CPC分类号： G01V3/32 , G01N24/081 , G01R33/34046 , G01R33/3415 , G01R33/3607 , G01R33/3664 , G01R33/5612
摘要： The present invention relates generally to an apparatus and method for obtaining an azimuthally resolved nuclear magnetic resonance measurement of an earth formation traversed by a borehole. The measurement can be made while drilling or using a wireline tool. A receiving rf antenna having a non-axisymmetric response pattern is used to obtain the azimuthally resolved nuclear magnetic resonance measurement. The antenna employs axial currents which excite an azimuthally oriented rf magnetic field. For this situation, the static magnetic field is either radial or axial in its orientation. The antenna generates a relatively long, in axial extent, region of generally uniform static field magnitude and polarization in the formation. The present invention facilitates low profile antenna configurations that can permit dispensing with the reduction of the inner diameter of the drill collar at the rf antenna location.
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公开(公告)号：US06366089B1
公开(公告)日：2002-04-02
申请号：US09644933
申请日：2000-08-23
申请人： Martin E. Poitzsch , Peter Speier , Krishnamurthy Ganesan , Shu-Kong Chang , Jaideva C. Goswami
发明人： Martin E. Poitzsch , Peter Speier , Krishnamurthy Ganesan , Shu-Kong Chang , Jaideva C. Goswami
IPC分类号： G01V300
CPC分类号： G01V3/32 , G01N24/081 , G01R33/34046 , G01R33/3415 , G01R33/3607 , G01R33/3664 , G01R33/5612
摘要： The present invention relates generally to an apparatus and method for obtaining an azimuthally resolved nuclear magnetic resonance measurement of an earth formation traversed by a borehole. The measurement can be made while drilling or using a wireline tool. A receiving rf antenna having a non-axisymmetric response pattern is used to obtain the azimuthally resolved nuclear magnetic resonance measurement. The antenna employs axial currents which excite an azimuthally oriented rf magnetic field. For this situation, the static magnetic field is either radial or axial in its orientation. The antenna generates a relatively long, in axial extent, region of generally uniform static field magnitude and polarization in the formation. The present invention facilitates low profile antenna configurations that can permit dispensing with the reduction of the inner diameter of the drill collar at the rf antenna location.
摘要翻译： 本发明一般涉及一种用于获得由钻孔穿过的地层的方位解析核磁共振测量的装置和方法。 可以在钻孔或使用有线工具时进行测量。 使用具有非轴对称响应模式的接收rf天线来获得方位解析的核磁共振测量。 该天线采用激发方位取向rf磁场的轴向电流。 对于这种情况，静磁场在其方向上是径向的或轴向的。 天线在轴向范围内产生相对较长的，在地层中大体均匀的静态场强和极化的区域。 本发明有助于可以允许在射频天线位置减小钻铤的内径的小型天线配置。
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公开(公告)号：US06255817B1
公开(公告)日：2001-07-03
申请号：US09094201
申请日：1998-06-09
申请人： Martin E. Poitzsch , Peter Speier , Krishnamurthy Ganesan , Shu-Kong Chang , Jaideva C. Goswami
发明人： Martin E. Poitzsch , Peter Speier , Krishnamurthy Ganesan , Shu-Kong Chang , Jaideva C. Goswami
IPC分类号： G01V300
CPC分类号： G01V3/32 , G01N24/081 , G01R33/34046 , G01R33/3415 , G01R33/3607 , G01R33/3664 , G01R33/5612
摘要： The present invention relates generally to an apparatus and method for obtaining an azimuthally resolved nuclear magnetic resonance measurement of an earth formation traversed by a borehole. The measurement can be made while drilling or using a wireline tool. A receiving rf antenna having a non-axisymmetric response pattern is used to obtain the azimuthally resolved nuclear magnetic resonance measurement. The antenna employs axial currents which excite an azimuthally oriented rf magnetic field. For this situation, the static magnetic field is either radial or axial in its orientation. The antenna generates a relatively long, in axial extent, region of generally uniform static field magnitude and polarization in the formation. The present invention facilitates low profile antenna configurations that can permit dispensing with the reduction of the inner diameter of the drill collar at the rf antenna location.
摘要翻译： 本发明一般涉及一种用于获得由钻孔穿过的地层的方位解析核磁共振测量的装置和方法。 可以在钻孔或使用有线工具时进行测量。 使用具有非轴对称响应模式的接收rf天线来获得方位解析的核磁共振测量。 该天线采用激发方位取向rf磁场的轴向电流。 对于这种情况，静磁场在其方向上是径向的或轴向的。 天线在轴向范围内产生相对较长的，在地层中大体均匀的静态场强和极化的区域。 本发明有助于可以允许在射频天线位置减小钻铤的内径的小型天线配置。
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8.发明授权公开(公告)号：US06246236B1
公开(公告)日：2001-06-12
申请号：US09186950
申请日：1998-11-05
申请人： Martin E. Poitzsch , Steven F. Crary , Krishnamurthy Ganesan , Ralf Heidler , Bruno Luong , Peter Speier
发明人： Martin E. Poitzsch , Steven F. Crary , Krishnamurthy Ganesan , Ralf Heidler , Bruno Luong , Peter Speier
IPC分类号： G01V300
CPC分类号： G01V11/005 , G01N24/081 , G01R33/385 , G01V3/32
摘要： The present invention is directed to a nuclear magnetic resonance logging-while-drilling tool. The tool comprises a drill bit, drill string, a plurality of RF antennas, and at least one gradient coil. The tool further comprises a plurality of magnets that are polarized in a direction parallel to the longitudinal axis of the tool but opposite to each other. The configuration of magnets and antennas provides for at least two NMR regions of investigation.
摘要翻译： 本发明涉及一种核磁共振测井同时钻探工具。 该工具包括钻头，钻柱，多个RF天线和至少一个梯度线圈。 该工具还包括多个磁体，它们在平行于工具的纵向轴线但彼此相对的方向上被极化。 磁体和天线的配置提供至少两个NMR调查区域。
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公开(公告)号：US10520574B2
公开(公告)日：2019-12-31
申请号：US15652682
申请日：2017-07-18
申请人： Peter Speier
发明人： Peter Speier
IPC分类号： G01V3/00 , G01R33/563
摘要： A magnetic resonance tomography scanner is provided for the determination a diffusion tensor of an examination object, and a method is provided for operating the magnetic resonance tomography scanner. The magnetic resonance tomography scanner acquires a volume image of the examination object by imaging magnetic resonance tomography without diffusion encoding. The control system segments the image according to diffusion-relevant symmetry properties and also determines volume elements of a symmetry group. A first and a second component of a diffusion tensor are acquired by the magnetic resonance tomography scanner at different angles and the control unit uses the symmetry property with the acquired components and the volume image to determine a diffusion tensor for the volume elements.
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公开(公告)号：US10393845B2
公开(公告)日：2019-08-27
申请号：US15368607
申请日：2016-12-03
IPC分类号： G01R33/36 , G01R33/565
摘要： A transmitter for pilot tone navigation in a magnetic resonance tomography system includes a power supply and an antenna. The transmitter is configured to transmit a pilot tone signal via the antenna. The transmitter also includes a decoupling element in order to protect a transmitter output from signals that the antenna receives with excitation pulses of the magnetic resonance tomography system during a magnetic resonance tomography. In a method, movement-dependent changes to the pilot tone signal of the transmitter are identified by a controller of the magnetic resonance tomography system.
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