公开(公告)号：US10677956B2

公开(公告)日：2020-06-09

申请号：US15765245

申请日：2016-09-08

Applicant: Schlumberger Technology Corporation

Inventor： Krishnamurthy Ganesan ,  Soumyajit Mandal ,  Van D. M. Koroleva ,  Gabriela Leu ,  Payam Tabrizi ,  Nicholas Heaton ,  Martin D. Hurlimann ,  Yi-Qiao Song

IPC: G01V3/32 ,  G01R33/44 ,  G01R33/36 ,  E21B47/12 ,  G01V3/38

Abstract: A method for measuring one or more properties of a formation includes applying a magnetic field to a subterranean formation using a downhole tool. A radiofrequency signal is transmitted into the subterranean formation that is exposed to the magnetic field. The radiofrequency signal induces a transverse magnetization in the subterranean formation, and the transverse magnetization induces an initial voltage signal in the downhole tool. The initial voltage signal is amplified using a first amplifier in the downhole tool such that the first amplifier outputs a first amplified voltage signal. The first amplified voltage signal is introduced to an input of the first amplifier, such that the first amplifier amplifies the first amplified voltage signal and outputs a second amplified voltage signal.

公开(公告)号：US10386530B2

公开(公告)日：2019-08-20

申请号：US14431843

申请日：2013-09-27

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Yi-Qiao Song ,  Soumyajit Mandal ,  Yiqiao Tang ,  Martin D. Hurlimann ,  Jeffrey Paulsen

IPC: G01R33/30 ,  G01V3/32 ,  E21B49/08 ,  G01N24/08 ,  G01R33/345 ,  G01R33/44 ,  G01R33/46 ,  G01N24/10 ,  G01R33/383

Abstract: A coaxial nuclear magnetic resonance (NMR) probe and related methods are described herein. The coaxial NMR probe includes a housing with a fluid inlet, a fluid outlet, a longitudinal axis, and an interior volume. The housing contains a fluid sample that is analyzed by the probe. The coaxial NMR probe also includes an elongated conductor disposed along the longitudinal axis of the housing. The elongated conductor generates an oscillating electromagnetic field within the interior volume of the housing. The oscillating electromagnetic field produces a NMR signal within the fluid sample. The elongated conductor may also be used to receive this NMR signal. The NMR signal is then analyzed to determine information about the fluid sample. Various NMR pulse sequences for use with this coaxial probe and other coaxial probes are also described herein.

公开(公告)号：US20160109613A1

公开(公告)日：2016-04-21

申请号：US14516425

申请日：2014-10-16

Applicant: Schlumberger Technology Corporation

Inventor： Jeffrey L. Paulsen ,  Martin D. Hurlimann ,  Julius Kusuma ,  Brian E. Boling ,  Soumyajit Mandal ,  Brian Gaddis

IPC: G01V3/38 ,  G01V3/32

CPC classification number: G01V3/38 ,  G01V3/32

Abstract: In one aspect, a nuclear magnetic resonance (NMR) system includes a transmitter of an NMR tool to output a magnetic field pulse into a zone of interest, a receiver of the NMR tool to output an NMR echo data set produced from an interaction of the magnetic field pulse and the zone of interest, and an NMR echo processing module including a filter matched to a response of the NMR tool to output a filtered NMR echo data set from the NMR echo data set. In another aspect, a method of processing an NMR echo data set includes providing from an NMR tool the NMR echo data set produced from an interaction of a magnetic field pulse and a zone of interest, matching a filter to a response of the NMR tool, and filtering the NMR echo data set with the filter to produce a filtered NMR echo data set.

Abstract translation: 在一个方面，核磁共振（NMR）系统包括用于将磁场脉冲输出到感兴趣区域的NMR工具的发射器，NMR工具的接收器，用于输出由以下的相互作用产生的NMR回波数据集： 磁场脉冲和感兴趣的区域，以及NMR回波处理模块，其包括与NMR工具的响应匹配的滤波器，以从NMR回波数据集输出滤波的NMR回波数据集。 在另一方面，一种处理NMR回波数据集的方法包括从NMR工具提供由磁场脉冲和感兴趣区域的相互作用产生的NMR回波数据集，其将过滤器与NMR工具的响应相匹配， 并用滤波器过滤NMR回波数据集，以产生经滤波的NMR回波数据集。

公开(公告)号：US20160109612A1

公开(公告)日：2016-04-21

申请号：US14516404

申请日：2014-10-16

Applicant: Schlumberger Technology Corporation

Inventor： Martin D. Hurlimann ,  Yi-Qiao Song ,  Jeffrey L. Paulsen ,  Shin Utsuzawa

IPC: G01V3/32 ,  G01V3/38

CPC classification number: G01V3/32 ,  G01N24/081 ,  G01R33/5617 ,  G01R33/56563 ,  G01R33/5659 ,  G01V3/38

Abstract: In one aspect, a nuclear magnetic resonance (NMR) system includes a transmitter to output a main refocusing pulse sequence and at least one subsequent refocusing pulse sequence into a zone of interest, a randomizing pulse module to output a randomizing pulse into the zone of interest to remove a net detected residual magnetization, and a receiver to output an NMR data set from the zone of interest. In another aspect, a method of generating a nuclear magnetic resonance (NMR) data set includes outputting a main refocusing pulse sequence and at least one subsequent refocusing pulse sequence into a zone of interest, outputting a randomizing pulse from a randomizing pulse module into the zone of interest to remove a net detected residual magnetization, and sensing the NMR data set from the zone of interest.

Abstract translation: 一方面，核磁共振（NMR）系统包括发射器，用于将主重聚焦脉冲序列和至少一个随后的重聚焦脉冲序列输出到感兴趣的区域中;随机化脉冲模块，用于将随机脉冲输出到感兴趣区域 以去除净检测到的剩余磁化，以及接收器从感兴趣区域输出NMR数据集。 在另一方面，一种产生核磁共振（NMR）数据集的方法包括将主重聚焦脉冲序列和至少一个后续重聚焦脉冲序列输出到感兴趣的区域中，将随机脉冲从随机脉冲模块输出到区域 感兴趣的是去除净检测到的剩余磁化，并从感兴趣的区域感测NMR数据集。