公开(公告)号：US20150323698A1

公开(公告)日：2015-11-12

申请号：US14272325

申请日：2014-05-07

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： SOUMYAJIT MANDAL ,  VAN D. M. KOROLEVA ,  TROY BORNEMAN ,  MARTIN D. HÜRLIMANN

IPC: G01V3/32 ,  G01V3/38 ,  G01V3/14

CPC classification number: G01V3/14 ,  G01V3/32 ,  G01V3/38

Abstract: A method for applying a nuclear magnetic resonance (NMR) sequence is described herein. The method includes applying a series of refocusing pulses to a substance within an inhomogeneous static magnetic field. Each refocusing pulse in the series of refocusing pulses includes a central axis, a total pulse duration greater than t180, and at least five segments (e.g., 5, 7, 11, 20, and 21). The phase of each segment is substantially anti-symmetric about the central axis of the refocusing pulse. In a more particular embodiment, the phase of each segment is also symmetric about the central axis of the refocusing pulse and the five segments include a substantially constant amplitude.

Abstract translation: 本文描述了应用核磁共振（NMR）序列的方法。 该方法包括将一系列重聚焦脉冲施加到非均匀静磁场内的物质。 一系列重聚焦脉冲中的每个再聚焦脉冲包括中心轴，大于t180的总脉冲持续时间和至少五个段（例如，5,7,11,20和21）。 每个段的相位关于重聚焦脉冲的中心轴基本上是反对称的。 在更具体的实施例中，每个段的相位也关于重聚焦脉冲的中心轴对称，并且五个段包括基本恒定的振幅。

公开(公告)号：US20170357025A1

公开(公告)日：2017-12-14

申请号：US15494009

申请日：2017-04-21

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： MARTIN D. HÜRLIMANN ,  SOUMYAJIT MANDAL ,  VAN MAI DO ,  YI-QIAO SONG

IPC: G01V3/32 ,  G01R33/561 ,  G01N24/08 ,  G01R33/44 ,  G01R33/38

CPC classification number: G01V3/32 ,  G01N24/081 ,  G01R33/3808 ,  G01R33/445 ,  G01R33/5617

Abstract: Illustrative embodiments are directed to applying a nuclear magnetic resonance sequence to a substance within an inhomogeneous static magnetic field. Various embodiments include applying a series of refocusing pulses to the substance, each refocusing pulse in the series of refocusing pulses having at least two segments, and a total pulse duration less than or equal to approximately 1.414 times T180. Various embodiments can further include applying an excitation pulse to the substance in the inhomogeneous static magnetic field, where the excitation pulse generates an initial magnetization that is aligned with a refocusing axis produced by a refocusing cycle that is performed after the excitation pulse.

公开(公告)号：US20150168585A1

公开(公告)日：2015-06-18

申请号：US14109354

申请日：2013-12-17

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： NICHOLAS N. BENNETT ,  YI ZENG ,  LALITHA VENKATARAMANAN ,  DENISE E. FREED ,  MARTIN D. HÜRLIMANN

IPC: G01V3/32 ,  E21B49/08

CPC classification number: G01V3/32 ,  E21B49/082

Abstract: Apparatus and methods of analyzing a composition of a hydrocarbon-containing fluid including using a nuclear magnetic resonance (NMR) tool to conduct a NMR relaxation measurement, a diffusion measurement, or both on the hydrocarbon-containing fluid to obtain NMR data, using a non-NMR tool to conduct an additional measurement of a reference fluid to obtain non-NMR data wherein the additional measurement comprises gas chromatography, optical observation, or both, and using the NMR data and the non-NMR data in an inversion process to determine an indication of the composition of the hydrocarbon-containing fluid. In some embodiments, the indication is determined over 4 chain length nodes.

Abstract translation: 包括使用核磁共振（NMR）工具对含烃流体的组成进行分析以对含烃流体进行NMR弛豫测量，扩散测量或两者的装置和方法，以获得NMR数据，使用非 - -NMR工具，以进行参考流体的额外测量以获得非NMR数据，其中附加测量包括气相色谱，光学观察或两者，并且在反演过程中使用NMR数据和非NMR数据来确定 指示含烃流体的组成。 在一些实施例中，通过4个链长节点确定指示。

公开(公告)号：US20140232391A1

公开(公告)日：2014-08-21

申请号：US13768965

申请日：2013-02-15

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： RAVINATH KAUSIK KADAYAM VISWANATHAN ,  LUKASZ ZIELINSKI ,  MARTIN D. HÜRLIMANN

IPC: G01R33/46 ,  G01V3/32 ,  G01R33/34

CPC classification number: G01V3/32 ,  G01N24/081 ,  G01R33/448 ,  G01R33/4633

Abstract: An NMR method and apparatus for analyzing a sample of interest applies a static magnetic field together with RF pulses of oscillating magnetic field across a sample volume that encompasses the sample of interest. The RF pulses are defined by a pulse sequence that includes a plurality of measurement segments configured to characterize a plurality of relaxation parameters related to relaxation of nuclear magnetization of the sample of interest. Signals induced by the RF pulses are detected in order to derive the relaxation parameters. The measurement segments of the pulse sequence include at least one first-type measurement segment configured to characterize relaxation of spin-lattice interaction between nuclei of the sample of interest in a rotating frame (T1ρ) at a predefined frequency. The T1ρ parameter can be measured in conjunction with the measurement of other relaxation and/or diffusion parameters as part of multidimensional NMR experiments.

Abstract translation: 用于分析感兴趣样品的NMR方法和装置将静态磁场与围绕感兴趣样品的样品体积的振荡磁场的RF脉冲一起施加。 RF脉冲由包括多个测量段的脉冲序列限定，该多个测量段被配置为表征与感兴趣样品的核磁化弛豫相关的多个弛豫参数。 检测由RF脉冲引起的信号以导出松弛参数。 脉冲序列的测量段包括至少一个第一类型测量段，其被配置为以预定频率表征旋转帧（T1＆rgr）中感兴趣的样本的核之间的自旋 - 晶格相互作用的弛豫。 T1＆rgr 参数可以与其他松弛和/或扩散参数的测量一起进行测量，作为多维NMR实验的一部分。