公开(公告)号：US10024997B2

公开(公告)日：2018-07-17

申请号：US14173405

申请日：2014-02-05

Applicant: Schlumberger Technology Corporation

Inventor： Vivek Anand ,  Robert Freedman ,  Anatoly Dementyev ,  Payam Tabrizi ,  Daniel Catina

IPC: G01V3/32 ,  G01R33/46

Abstract: The Larmor frequency for an in situ nuclear magnetic resonance (NMR) tool is determined and used to acquire NMR data. An NMR tool is provided and placed in situ, for example, in a wellbore. An initial estimate of the Larmor frequency for the in situ NMR tool is made and NMR data are acquired using the in situ NMR tool. A spectral analysis is performed on the NMR data, or optionally, the NMR data are digitized and a discrete Fourier transform (DFT) is performed on the digitized NMR data. The modal frequency of the spectral analysis or DFT is determined, and the Larmor frequency for the in situ NMR tool is determined using the modal frequency. The NMR tool is modified to transmit at the determined Larmor frequency and then used to acquire further NMR data.

公开(公告)号：US09459330B2

公开(公告)日：2016-10-04

申请号：US13827549

申请日：2013-03-14

Applicant: Schlumberger Technology Corporation

Inventor： Robert Freedman ,  Vivek Anand ,  Payam Tabrizi ,  Ricardo Y. Torres ,  Douglas W. Grant ,  Daniel Catina ,  Krishnamurthy Ganesan

IPC: G01R33/30 ,  G01N24/08 ,  G01V3/32

CPC classification number: G01R33/30 ,  G01N24/081 ,  G01R33/305 ,  G01V3/32

Abstract: A nuclear magnetic resonance (NMR) measurement system for high pressure and temperature measurements on fluids is disclosed. The system has a sensor assembly that includes a sample holder having a body formed from a non-magnetic metal and defining an interior cavity for receiving a fluid sample, a frame member disposed in the interior cavity of the sample holder, an antenna coil disposed in the interior cavity about the frame member, an inlet that allows the fluid sample to enter the interior cavity, an outlet that allows for the fluid sample to be flushed from the interior cavity, and a magnet assembly having a central bore in which the sample holder is disposed. Adjacent to the sample holder are pulsed field gradient coils for performing diffusion measurements. The system further includes pulse sequencer circuitry that supplies signals to the antenna coil. When the interior cavity of the sample holder is filled with the fluid sample, the antenna coil and the frame member are at least partially submerged in the fluid sample, and the antenna coil obtains NMR measurements of the fluid sample in response to the signals. Related methods and apparatuses are also disclosed herein.

Abstract translation: 公开了用于对流体进行高压和温度测量的核磁共振（NMR）测量系统。 该系统具有传感器组件，其包括具有由非磁性金属形成的主体并且限定用于接收流体样品的内部空腔的样品保持器，设置在样品保持器的内部空腔中的框架构件，设置在 围绕框架构件的内部空腔，允许流体样品​​进入内部空腔的入口，允许流体样品​​从内部空腔冲洗的出口，以及具有中心孔的磁体组件，样品架 被处置。 与样品架相邻的是用于进行扩散测量的脉冲场梯度线圈。 该系统还包括向天线线圈提供信号的脉冲序列器电路。 当样品保持器的内腔填充有流体样品时，天线线圈和框架构件至少部分地浸没在流体样品中，并且天线线圈响应于信号获得流体样品的NMR测量值。 本文还公开了相关方法和装置。

公开(公告)号：US20140253116A1

公开(公告)日：2014-09-11

申请号：US13827549

申请日：2013-03-14

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Robert Freedman ,  Vivek Anand ,  Payam Tabrizi ,  Ricardo Y. Torres ,  Douglas W. Grant ,  Daniel Catina ,  Krishnamurthy Ganesan

IPC: G01R33/30 ,  G01V3/32

CPC classification number: G01R33/30 ,  G01N24/081 ,  G01R33/305 ,  G01V3/32

Abstract: A nuclear magnetic resonance (NMR) measurement system for high pressure and temperature measurements on fluids is disclosed. The system has a sensor assembly that includes a sample holder having a body formed from a non-magnetic metal and defining an interior cavity for receiving a fluid sample, a frame member disposed in the interior cavity of the sample holder, an antenna coil disposed in the interior cavity about the frame member, an inlet that allows the fluid sample to enter the interior cavity, an outlet that allows for the fluid sample to be flushed from the interior cavity, and a magnet assembly having a central bore in which the sample holder is disposed. Adjacent to the sample holder are pulsed field gradient coils for performing diffusion measurements. The system further includes pulse sequencer circuitry that supplies signals to the antenna coil. When the interior cavity of the sample holder is filled with the fluid sample, the antenna coil and the frame member are at least partially submerged in the fluid sample, and the antenna coil obtains NMR measurements of the fluid sample in response to the signals. Related methods and apparatuses are also disclosed herein.

Abstract translation: 公开了用于对流体进行高压和温度测量的核磁共振（NMR）测量系统。 该系统具有传感器组件，其包括具有由非磁性金属形成的主体并且限定用于接收流体样品的内部空腔的样品保持器，设置在样品保持器的内部空腔中的框架构件，设置在 围绕框架构件的内部空腔，允许流体样品​​进入内部空腔的入口，允许流体样品​​从内部空腔冲洗的出口，以及具有中心孔的磁体组件，样品架 被处置。 与样品架相邻的是用于进行扩散测量的脉冲场梯度线圈。 该系统还包括向天线线圈提供信号的脉冲序列器电路。 当样品保持器的内腔填充有流体样品时，天线线圈和框架构件至少部分地浸没在流体样品中，并且天线线圈响应于信号获得流体样品的NMR测量值。 本文还公开了相关方法和装置。

公开(公告)号：US20140152301A1

公开(公告)日：2014-06-05

申请号：US14173405

申请日：2014-02-05

Applicant: Schlumberger Technology Corporation

Inventor： Vivek Anand ,  Robert Freedman ,  Anatoly Dementyev ,  Payam Tabrizi ,  Daniel Catina

IPC: G01V3/32

CPC classification number: G01V3/32 ,  G01R33/4625

Abstract: The Larmor frequency for an in situ nuclear magnetic resonance (NMR) tool is determined and used to acquire NMR data. An NMR tool is provided and placed in situ, for example, in a wellbore. An initial estimate of the Larmor frequency for the in situ NMR tool is made and NMR data are acquired using the in situ NMR tool. A spectral analysis is performed on the NMR data, or optionally, the NMR data are digitized and a discrete Fourier transform (DFT) is performed on the digitized NMR data. The modal frequency of the spectral analysis or DFT is determined, and the Larmor frequency for the in situ NMR tool is determined using the modal frequency. The NMR tool is modified to transmit at the determined Larmor frequency and then used to acquire further NMR data.

Abstract translation: 确定原位核磁共振（NMR）工具的拉莫尔频率并用于获得NMR数据。 提供NMR工具并放置在例如井眼中。 进行原位NMR工具的拉莫尔频率的初步估算，并使用原位NMR工具获得NMR数据。 对NMR数据进行光谱分析，或者可选地，NMR数据被数字化，并且对数字化NMR数据进行离散傅里叶变换（DFT）。 确定光谱分析或DFT的模态频率，并使用模态频率确定原位NMR工具的拉莫尔频率。 NMR工具被修改为以确定的拉莫尔频率发射，然后用于获取进一步的NMR数据。