公开(公告)号：US20150192011A1

公开(公告)日：2015-07-09

申请号：US14149537

申请日：2014-01-07

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： SOUMYAJIT MANDAL ,  YI-QIAO SONG

IPC: E21B49/08 ,  G01N33/28 ,  G01V3/32

CPC classification number: E21B49/087 ,  E21B49/10 ,  G01N33/28 ,  G01V3/32

Abstract: A hydrocarbon sample is subjected to a chemically selective J-editing nuclear magnetic resonance (NMR) pulse sequence. Resulting signals are analyzed in order to identify a coupling frequency present in at least one molecule of the hydrocarbon sample. A J-coupling frequency of approximately 150 Hz is indicative of a component having an internal double bonded carbon atom (i.e., an olefin). The presence of an olefin in a hydrocarbon sample can be indicative of the presence of a synthetic based mud (SBM) in the sample.

Abstract translation: 对烃样品进行化学选择性的J-编辑核磁共振（NMR）脉冲序列。 分析所得到的信号以便鉴定存在于烃样品的至少一个分子中的耦合频率。 约150Hz的J耦合频率表示具有内部双键碳原子（即烯烃）的组分。 烃样品中烯烃的存在可以指示样品中合成基泥浆（SBM）的存在。

公开(公告)号：US20150260813A1

公开(公告)日：2015-09-17

申请号：US14213887

申请日：2014-03-14

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： SOUMYAJIT MANDAL ,  SHIN UTSUZAWA ,  YI-QIAO SONG

IPC: G01R33/46 ,  G01V3/34 ,  G01R33/36 ,  G01V3/14

CPC classification number: G01R33/3621 ,  G01N24/081 ,  G01R33/3614 ,  G01V3/32

Abstract: A magnetic resonance (MR) receiver is described herein. The MR receiver can be used to process nuclear magnetic resonance (NMR) signals. The MR receiver includes a transformer that amplifies the MR signals and a preamplifier that receives the MR signals from the transformer. The preamplifier can include a transimpedance amplifier circuit with an input stage that includes a field effect transistor.

Abstract translation: 本文描述了磁共振（MR）接收机。 MR接收机可用于处理核磁共振（NMR）信号。 MR接收机包括放大MR信号的变压器和从变压器接收MR信号的前置放大器。 前置放大器可以包括具有包括场效应晶体管的输入级的跨阻抗放大器电路。

公开(公告)号：US20150115954A1

公开(公告)日：2015-04-30

申请号：US14067567

申请日：2013-10-30

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： YI-QIAO SONG ,  SOUMYAJIT MANDAL

IPC: G01R33/34 ,  G01V3/08

CPC classification number: G01R33/34092 ,  G01N24/081 ,  G01R33/34053 ,  G01R33/3607 ,  G01R33/3614 ,  G01V3/32

Abstract: A non-resonant transmitter for a magnetic resonance (MR) system, such as a nuclear magnetic resonance (NMR) system, is described herein. The transmitter includes a coil for applying NMR pulse sequences to a substance. The coil is coupled to a circuit that includes a capacitor, a number of switches, and a power source. The transmitter operates in two modes. In a charging mode, the switches decouple the coil from the capacitor and the capacitor is charged by the power source. In a discharging mode, a radio frequency pulse is generated and the switches couple and decouple the coil from the capacitor so that the capacitor provides power to the coil. The addition of the capacitor improves the power factor of the circuit and reduces power draw from the power source.

Abstract translation: 本文描述了用于磁共振（MR）系统的非谐振发射器，例如核磁共振（NMR）系统。 发射机包括用于向物质施加NMR脉冲序列的线圈。 线圈耦合到包括电容器，多个开关和电源的电路。 发射机工作在两种模式。 在充电模式下，开关将线圈与电容器分离，电容器由电源充电。 在放电模式中，产生射频脉冲，并且开关将线圈与电容器耦合和去耦，使得电容器向线圈提供电力。 增加电容器可以提高电路的功率因数，并降低电源的功耗。

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：US20130234704A1

公开(公告)日：2013-09-12

申请号：US13774425

申请日：2013-02-22

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： MARTIN D. Hürlimann ,  YI-QIAO SONG ,  SOUMYAJIT MANDAL

IPC: G01R33/46

CPC classification number: G01R33/46 ,  G01N24/081 ,  G01R33/28 ,  G01R33/3621 ,  G01R33/3808 ,  G01R33/445 ,  G01V3/32

Abstract: A method and system for determining a nuclear magnetic resonance (NMR) property are described herein. The method includes applying a static magnetic field to a substance and applying an NMR pulse sequence to the substance. The NMR pulse sequence comprises a first pulse sequence segment applied at a first frequency to a shell and a second pulse sequence segment applied at a second frequency. The first pulse sequence segment generates a resonant signal in the shell and the second pulse sequence segment generates a characteristic within the resonant signal. The resonant signal is detected and an NMR property is determined using the characteristic within the detected resonant signal.

Abstract translation: 本文描述了用于确定核磁共振（NMR）性质的方法和系统。 该方法包括对物质施加静态磁场并向该物质施加NMR脉冲序列。 NMR脉冲序列包括以第一频率施加到壳的第一脉冲序列片段和以第二频率施加的第二脉冲序列片段。 第一脉冲序列段在壳中产生谐振信号，第二脉冲序列段在谐振信号内产生特性。 检测谐振信号，并使用检测到的谐振信号内的特性来确定NMR特性。

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：US20130234706A1

公开(公告)日：2013-09-12

申请号：US13774487

申请日：2013-02-22

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： SOUMYAJIT MANDAL ,  YI-QIAO SONG ,  SHIN UTSUZAWA ,  MARC THOMPSON

IPC: G01R33/28 ,  G01V3/32

CPC classification number: G01R33/46 ,  G01N24/081 ,  G01R33/28 ,  G01R33/3621 ,  G01R33/3808 ,  G01R33/445 ,  G01V3/32

Abstract: A broadband magnetic resonance (MR) receiver is described herein. The MR receiver can be used to process nuclear magnetic resonance (NMR) signals. The MR receiver includes a transformer that amplifies the MR signals and a preamplifier that receives the MR signals from the transformer. The preamplifier includes a common-drain amplifier stage and a common-source amplifier stage.

Abstract translation: 本文描述了宽带磁共振（MR）接收机。 MR接收机可用于处理核磁共振（NMR）信号。 MR接收机包括放大MR信号的变压器和从变压器接收MR信号的前置放大器。 前置放大器包括共漏极放大器级和公共源放大级。

公开(公告)号：US20150115953A1

公开(公告)日：2015-04-30

申请号：US14067475

申请日：2013-10-30

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： A. BALLARD ANDREWS ,  SORAYA S. BETANCOURT ,  ANDREW E. POMERANTZ ,  SOUMYAJIT MANDAL ,  YI-QIAO SONG

IPC: G01V3/08 ,  E21B49/00

CPC classification number: G01V3/08 ,  G01N24/081 ,  G01V3/32

Abstract: A formation fluid sample is analyzed using NMR spectroscopy to obtain a NMR spectrum. The NMR spectrum is then analyzed to find evidence of the amount of olefins present in the sample. The amount of olefins present in the sample can then be correlated to the level of contamination of the sample. In one embodiment, a 1H chemical shift of between substantially 4.5 and 6 ppm is used to identify olefins present in the sample. In another embodiment, a 1H chemical shift of substantially 1.9 to 2.1 ppm is used to identify olefins present in the sample. The NMR spectral equipment can be located uphole or downhole.

Abstract translation: 使用NMR光谱分析地层流体样品以获得NMR光谱。 然后分析NMR谱以发现样品中存在的烯烃的量的证据。 然后可以将样品中存在的烯烃的量与样品的污染水平相关联。 在一个实施方案中，使用基本上4.5和6ppm之间的1H化学位移来鉴定样品中存在的烯烃。 在另一个实施方案中，使用基本上1.9至2.1ppm的1H化学位移来鉴定样品中存在的烯烃。 NMR光谱设备可以位于井下或井下。

公开(公告)号：US20130234705A1

公开(公告)日：2013-09-12

申请号：US13774457

申请日：2013-02-22

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： SOUMYAJIT MANDAL ,  SHIN UTSUZAWA ,  YI-QIAO SONG

IPC: G01R33/46

CPC classification number: G01R33/46 ,  G01N24/081 ,  G01R33/28 ,  G01R33/3621 ,  G01R33/3808 ,  G01R33/445 ,  G01V3/32

Abstract: A method and system for applying nuclear magnetic resonance (NMR) sequences to a substance are described herein. The method includes applying an NMR pulse sequence to the substance using a non-resonant transmitter circuit. The NMR pulse sequence includes a first pulse sequence segment applied at a first frequency to a first shell within the substance and a second pulse sequence segment applied at a second frequency to a second shell. The second pulse sequence segment is initiated before the first shell reaches thermal equilibrium. In some cases, the first pulse sequence segment and the second pulse sequence segment are interposed within each other. Such NMR pulse sequences, with multiple pulse sequence segments, can also be applied to different atomic nuclei.

Abstract translation: 本文描述了将核磁共振（NMR）序列应用于物质的方法和系统。 该方法包括使用非谐振发射器电路将NMR脉冲序列应用于物质。 NMR脉冲序列包括以第一频率施加到物质内的第一壳体的第一脉冲序列片段和以第二频率施加到第二壳体的第二脉冲序列片段。 第二个脉冲序列段在第一个壳达到热平衡之前启动。 在一些情况下，第一脉冲序列段和第二脉冲序列段彼此插入。 具有多个脉冲序列片段的NMR脉冲序列也可以应用于不同的原子核。