公开(公告)号：US07180287B2

公开(公告)日：2007-02-20

申请号：US10839478

申请日：2004-05-05

申请人： Peter Rottengatter ,  Holger Thern ,  Radu Fechete ,  Martin Blanz ,  Thomas Kruspe

发明人： Peter Rottengatter ,  Holger Thern ,  Radu Fechete ,  Martin Blanz ,  Thomas Kruspe

IPC分类号： G01V3/00

CPC分类号： G01V3/32

摘要： NMR spin echo signals, acquired on a MWD logging tool, are susceptible to errors magnetic flux density has a gradient and the magnet on the logging tool is moving relative to the earth. The errors can be corrected by having the excitation pulse cover a smaller or a larger volume than the refocusing pulses. Correction may also be made by selective saturation, or by echo averaging.

摘要翻译： 在MWD测井工具上获取的NMR自旋回波信号容易受到误差的影响，磁通密度具有梯度，而测井工具上的磁体相对于地球运动。 可以通过使激发脉冲覆盖比重新聚焦脉冲更小或更大的体积来校正误差。 还可以通过选择性饱和或通过回波平均来进行校正。

公开(公告)号：US20070032956A1

公开(公告)日：2007-02-08

申请号：US11284117

申请日：2005-11-21

申请人： Martin Blanz ,  Andy Brooks

发明人： Martin Blanz ,  Andy Brooks

IPC分类号： G01V1/28

CPC分类号： G01V3/32

摘要： An amplitude of an echo signal in a driven equilibrium (DE) pulse group is used for determination of a longitudinal relaxation time T1 of an earth formation. DE pulse groups followed by a CPMG sequence can be used for estimating both T1 and a transverse relaxation time T2 within one fast measurement.

摘要翻译： 驱动平衡（DE）脉冲组中的回波信号的振幅用于确定地层的纵向弛豫时间T 1> 1。 随后是CPMG序列的DE脉冲组可以用于在一个快速测量中估计T 1和T 2横向弛豫时间T 2 2。

公开(公告)号：US20060273787A1

公开(公告)日：2006-12-07

申请号：US11435265

申请日：2006-05-16

申请人： Martin Blanz

发明人： Martin Blanz

IPC分类号： G01V3/00

CPC分类号： G01R33/5617 ,  G01N24/081 ,  G01R33/56308 ,  G01V3/32

摘要： NMR spin echo signals are corrected for axial motion of the borehole logging tool. The correction is applied to an averaged echo train using an average velocity determined from surface measurements over the duration of averaging of the echo trains. An additional correction may be applied to correct for excess polarization or incomplete polarization of nuclear spins due to an insufficient wait time between pulse sequences.

摘要翻译： NMR自旋回波信号被校正用于钻孔测井工具的轴向运动。 该校正应用于使用在回波列车的平均持续时间内由表面测量确定的平均速度的平均回波串。 由于脉冲序列之间的等待时间不足，可以应用附加的校正来校正核自旋的过量极化或不完全偏振。

公开(公告)号：US20060192554A1

公开(公告)日：2006-08-31

申请号：US11413541

申请日：2006-04-28

申请人： Martin Blanz ,  Thomas Kruspe

发明人： Martin Blanz ,  Thomas Kruspe

IPC分类号： G01V3/00

CPC分类号： E21B49/00 ,  E21B49/08 ,  G01N24/081 ,  G01R33/281 ,  G01R33/5601 ,  G01R33/5605 ,  G01R33/5617 ,  G01R33/62 ,  G01V3/32

摘要： An apparatus and method is discussed for characterizing a fluid sample downhole of aliphatic hydrocarbon compounds, aromatic hydrocarbon compound, or connate mud filtrates containing carbon-13 isotopes using an enhanced nuclear magnetic resonance (NMR) signal on a measurement-while-drilling device. To enhance the carbon-13 NMR signal these nuclei are being hyperpolarized. Either the Overhauser Effect (OE) or the Nuclear Overhauser Effect or optical pumping and the Spin Polarization Induced Nuclear Overhauser Effect (SPINOE) can serve as a mechanism for hyperpolarization of the carbon-13 nuclei.

摘要翻译： 讨论了一种装置和方法，用于在钻井测量装置上使用增强的核磁共振（NMR）信号来表征含有碳-13同位素的脂族烃化合物，芳烃化合物或原生泥浆滤液在井下的流体样品。 为了增强碳-13 NMR信号，这些核正在被超极化。 Overhauser效应（OE）或核超越效应或光泵浦和旋转极化诱导的核超越效应（SPINOE）可以作为碳-13核超极化的机制。

公开(公告)号：US5814989A

公开(公告)日：1998-09-29

申请号：US162002

申请日：1994-03-28

申请人： John Alec Syndney Smith ,  Julian David Shaw ,  Martin Blanz

发明人： John Alec Syndney Smith ,  Julian David Shaw ,  Martin Blanz

IPC分类号： A61B5/055 ,  G01K3/00 ,  G01N24/00 ,  G01R33/38 ,  G01R33/385 ,  G01R33/44 ,  G01R33/48 ,  G01V3/14 ,  G01V3/00

CPC分类号： G01R33/381 ,  G01R33/441 ,  G01R33/385

摘要： A method and apparatus for imaging within a sample space an object containing quadrupolar nuclei comprises irradiating the object to excite nuclear quadrupole resonance, applying to the object a magnetic field gradient having a profile Bo(x) such that the square of the profile Bo(x))2 varies linearly with distance (x), detecting resonance response signals from the nuclei, and deriving an image from the response signals. A method of and apparatus for nuclear quadrupole resonance testing an object, and a method of and apparatus for detecting the presence of a particular substance containing a given species of quadrupolar nucleus, are also disclosed.

摘要翻译： PCT No.PCT / GB92 / 01004 Sec。 371日期：1994年3月28日 102（e）1994年3月28日PCT提交1992年6月4日PCT公布。 出版物WO93 / 05693 日期：1993年04月1日一种用于在样本空间内成像含有四极核的物体的方法和装置包括：照射物体以激发核四极共振，向物体施加具有轮廓Bo（x）的磁场梯度，使得 轮廓Bo（x））2随距离（x）线性变化，检测来自核的共振响应信号，以及从响应信号导出图像。 还公开了用于核四极共振测试物体的方法和装置，以及用于检测含有给定种类的四极核的特定物质的存在的方法和装置。

公开(公告)号：US5814987A

公开(公告)日：1998-09-29

申请号：US619466

申请日：1996-03-25

申请人： John Alec Sydney Smith ,  Martin Blanz

发明人： John Alec Sydney Smith ,  Martin Blanz

IPC分类号： G01N24/00 ,  G01N24/08 ,  G01R33/44 ,  G01R33/46 ,  G01R33/48 ,  G01V3/00

CPC分类号： G01R33/446 ,  G01R33/441

摘要： Apparatus for Nuclear Quadrupole Resonance testing a sample comprises: means for applying excitation to the sample to excite NQR resonance, the excitation comprising at least one excitation pulse, the or each pulse covering a selected excitation frequency range, for the or each pulse the phase of the excitation varying generally non-linearly with the excitation frequency over the selected range; and means for detecting the NQR response signal.

摘要翻译： PCT No.PCT / GB94 / 02070 Sec。 371日期：1996年3月25日 102（e）1996年3月25日PCT 1994年9月23日PCT公布。 公开号WO95 / 09368 日期1995年4月6日用于核四极共振测试的装置测试样品包括：用于向样品施加激发以激发NQR共振的装置，所述激发包括至少一个激发脉冲，所述激发脉冲或覆盖所选激发频率范围的每个脉冲用于或 每个脉冲，激励相位通常在所选范围内与激励频率非线性变化; 以及用于检测NQR响应信号的装置。

公开(公告)号：US10539705B2

公开(公告)日：2020-01-21

申请号：US14920436

申请日：2015-10-22

申请人： Radu Coman ,  Holger Tietjen ,  Holger F. Thern ,  Martin Blanz

发明人： Radu Coman ,  Holger Tietjen ,  Holger F. Thern ,  Martin Blanz

IPC分类号： G01V3/32 ,  G01V3/38 ,  G01V3/40

摘要： A system for measuring a property of fluid in an earth formation includes a downhole tool disposed in a borehole and configured to be movable within the borehole and a nuclear magnetic resonance (NMR) measurement device including a transmitter configured to emit at least two pulse trains of magnetic energy into the earth formation and a detector configured to detect a long-TW echo train and a short-TW echo train resulting from the at least two pulse trains. The system also includes a processor configured to combine the information from the at least two pulse trains and a rate of penetration of the downhole tool to form a measurement of the property.

公开(公告)号：US10126457B2

公开(公告)日：2018-11-13

申请号：US15061636

申请日：2016-03-04

申请人： Radu Coman ,  Holger Tietjen ,  Martin Blanz ,  Holger F. Thern

发明人： Radu Coman ,  Holger Tietjen ,  Martin Blanz ,  Holger F. Thern

IPC分类号： G01V3/32 ,  E21B49/08 ,  E21B47/12 ,  E21B49/00 ,  G01N24/08 ,  G01R33/36 ,  G01R33/383 ,  G01R33/44

摘要： A nuclear magnetic resonance (NMR) apparatus includes a transmitting assembly configured to emit one or more dual-wait-time pulse sequences, and a receiving assembly configured to detect a long-wait-time echo train and a short-wait-time echo train. The apparatus also includes a processor configured to perform at least one of: estimating a difference between the long-wait-time echo train and the short-wait-time echo train to generate a differential echo-train, inverting the differential echo-train into a differential T2 distribution, and detecting a motion artefact in response to determining that the differential echo-train includes a short-T2 porosity fraction that is greater than a threshold value; and inverting two echo trains into two T2 distributions, calculating at least two porosity fractions for each of the two T2 distributions, estimating a shift of a porosity amount between the at least two porosity fractions, and detecting the motion artefact based on the shift.

公开(公告)号：US09223048B2

公开(公告)日：2015-12-29

申请号：US14551979

申请日：2014-11-24

申请人： Martin Blanz ,  Thomas Kruspe

发明人： Martin Blanz ,  Thomas Kruspe

IPC分类号： G01V3/00 ,  G01V3/32 ,  G01F1/56 ,  G01V3/38

CPC分类号： G01V3/32 ,  G01F1/56 ,  G01V3/38

摘要： An apparatus and method to detect a fluid flow. The apparatus includes a nuclear magnetic resonance (NMR) tool to perform an NMR measurement on the fluid in a sensitive volume by establishing a magnetic field in the sensitive volume that exhibits a change in magnitude in a direction of the fluid flow when the fluid flow is radial with respect to the NMR tool and by transmitting refocus pulses, without any tipping pulse, to obtain the NMR measurement comprising spin echo signals. The system also includes a processor to receive the NMR measurement from the NMR tool and determine whether the fluid flow exists based on an amplitude of the NMR measurement.

摘要翻译： 一种检测流体流动的装置和方法。 该装置包括核磁共振（NMR）工具，用于通过在灵敏体积中建立磁场来对流体的灵敏体积进行NMR测量，该磁场在流体流动是在流体流动方向上呈现出在流体流动方向上的大小变化 径向相对于NMR工具，并且通过发射再聚焦脉冲而没有任何倾翻脉冲，以获得包括自旋回波信号的NMR测量。 该系统还包括从NMR工具接收NMR测量的处理器，并且基于NMR测量的幅度来确定流体流是否存在。

公开(公告)号：US08952690B2

公开(公告)日：2015-02-10

申请号：US13402307

申请日：2012-02-22

申请人： Martin Blanz ,  Thomas Kruspe

发明人： Martin Blanz ,  Thomas Kruspe

IPC分类号： G01V3/00

CPC分类号： G01V3/32 ,  G01F1/56 ,  G01V3/38

摘要： An apparatus detects a fluid flow. The apparatus includes a nuclear magnetic resonance (NMR) tool configured to perform an NMR measurement on the fluid in a sensitive volume by establishing a magnetic field in the sensitive volume and transmitting a sequence of refocus pulses, without a tipping pulse, the NMR measurement comprising spin echo signals. The apparatus also includes a processor configured to detect a presence of the fluid flow in the sensitive volume based on the spin echo signals.

摘要翻译： 装置检测流体流动。 该装置包括核磁共振（NMR）工具，其被配置为通过在敏感体积中建立磁场并且在没有倾覆脉冲的情况下传输一系列重新聚焦脉冲，对敏感体积中的流体进行NMR测量，NMR测量包括 自旋回波信号。 该装置还包括处理器，其配置成基于自旋回波信号检测敏感体积中的流体流的存在。