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    Use of echo shapes in nuclear magnetic resonance log data acquisition and quality control
    1.
    发明授权
    Use of echo shapes in nuclear magnetic resonance log data acquisition and quality control 有权

    公开(公告)号：US10215829B2

    公开(公告)日：2019-02-26

    申请号：US15142577

    申请日：2016-04-29

    Applicant: Schlumberger Technology Corporation

    Inventor： Nicholas Heaton

    IPC: G01V3/32 ,  G01R33/56 ,  G01N24/08

    Abstract: A method to process information from a wellbore tool is disclosed having steps of placing a wellbore nuclear magnetic resonance tool in a wellbore to a scan a geological formation, activating the nuclear magnetic resonance tool to send signals to and receive signals from the geological formation, acquiring the received signals from the geological formation wherein the received signals have an echo shape, storing the echo shape according to at least one of a quadrature phase and a nominal signal phase, computing an echo shape from all of the received signals, determining a presence of a noise from the received signals, defining a noise filter based upon the received signals from the nuclear magnetic resonance tool and using the filter to remove noise from the received signals.

    Method of performing error-correction of nuclear magnetic resonance data
    3.
    发明授权
    Method of performing error-correction of nuclear magnetic resonance data 有权
    执行核磁共振数据纠错的方法

    公开(公告)号：US09582353B2

    公开(公告)日：2017-02-28

    申请号：US14374429

    申请日：2013-01-30

    Applicant: Schlumberger Technology Corporation

    Inventor： Nicholas N. Bennett ,  Lalitha Venkataramanan ,  Nicholas Heaton

    IPC: H03M13/00 ,  G06F11/10 ,  G01V3/32 ,  G01V3/14 ,  H04B7/24 ,  G01R33/46

    CPC classification number: G06F11/10 ,  G01R33/4625 ,  G01V3/14 ,  G01V3/32 ,  H04B7/24

    Abstract: A method of obtaining nuclear magnetic resonance (NMR) data from a subterranean formation may include operating a tool in a subterranean formation for generating both NMR data and NMR scaled data based upon NMR measurements of the subterranean formation. The method also includes operating the tool for encoding and transmitting both the NMR data and NMR scaled data, and receiving and decoding, above the subterranean formation, both the NMR data and NMR scaled data from the tool. The method also includes performing error-correction of the received and decoded NMR data based upon the received and decoded NMR scaled data.

    Abstract translation: 从地层获得核磁共振（NMR）数据的方法可包括在地下地层中操作工具，用于基于地层的NMR测量产生NMR数据和NMR缩放数据。 该方法还包括操作用于编码和传输NMR数据和NMR缩放数据的工具，以及在地下地层上方接收和解码来自工具的NMR数据和NMR定标数据。 该方法还包括基于接收和解码的NMR定标数据对接收和解码的NMR数据执行纠错。

    Semi-Analytic Inversion Method For Nuclear Magnetic Resonance (NMR) Signal Processing
    4.
    发明申请
    Semi-Analytic Inversion Method For Nuclear Magnetic Resonance (NMR) Signal Processing 审中-公开
    用于核磁共振（NMR）信号处理的半分析反演方法

    公开(公告)号：US20160124109A1

    公开(公告)日：2016-05-05

    申请号：US14896459

    申请日：2014-06-27

    Applicant: Schlumberger Technology Corporation

    Inventor： Can Evren Yarman ,  Nicholas Heaton ,  Lucas Monzon ,  Matthew Reynolds

    IPC: G01V3/38 ,  E21B47/12 ,  E21B47/00 ,  G01V3/32 ,  G01N24/08

    CPC classification number: G01V3/38 ,  E21B47/00 ,  E21B47/12 ,  G01N24/081 ,  G01R33/448 ,  G01V3/32

    Abstract: The present disclosure provides a semi-analytic inversion method that computes an approximate, sparse representation of the data in terms of the (a, T1, T2). Methods, in accordance with the present disclosure, compute T2's in a semi-analytic fashion, such as by using simultaneous Hankel representation of the data, use one dimensional convex optimization to compute the amplitudes, a, and finally compute T1 in an analytic fashion by appropriate averaging techniques. The proposed method provides a more efficient way to represent the data when compared to linearized methods, and is computationally less demanding when compared to some existing nonlinear optimization methods.

    Abstract translation: 本公开提供了一种半解析反演方法，其根据（a，T1，T2）计算数据的近似稀疏表示。 根据本公开的方法，例如通过使用数据的同时Hankel表示以半分析方式计算T2，使用一维凸优化来计算幅度a，并且最终以分析方式计算T1 适当的平均技术。 当与线性化方法相比时，所提出的方法提供了更有效的方式来表示数据，并且当与一些现有的非线性优化方法相比时计算量要求较低。

    NUCLEAR MAGNETIC RESONANCE DATA ACQUISITION SYSTEM
    7.
    发明申请
    NUCLEAR MAGNETIC RESONANCE DATA ACQUISITION SYSTEM 有权

    公开(公告)号：US20210003734A1

    公开(公告)日：2021-01-07

    申请号：US16976199

    申请日：2019-03-01

    Applicant: Schlumberger Technology Corporation

    Inventor： Nicholas Heaton

    IPC: G01V3/32

    Abstract: A method can include controlling radio frequency emission circuitry of a nuclear magnetic resonance unit to emit radio frequency energy according to a first set of parameters that comprises a first wait time for an even number of sequence repeats with positive and negative phases and to emit radio frequency energy according to a second set of parameters that includes a second wait time for a single sequence with a single phase, where the second wait time is greater than the first wait time; and acquiring, via antenna circuitry and analog-to-digital conversion circuitry, nuclear magnetic resonance.

    OPTIMIZATION OF MAGNET ARRANGEMENT FOR NUCLEAR MAGNETIC RESONANCE WELL LOGGING TOOLS
    9.
    发明申请
    OPTIMIZATION OF MAGNET ARRANGEMENT FOR NUCLEAR MAGNETIC RESONANCE WELL LOGGING TOOLS 审中-公开

    公开(公告)号：US20190324101A1

    公开(公告)日：2019-10-24

    申请号：US16459240

    申请日：2019-07-01

    Applicant: Schlumberger Technology Corporation

    Inventor： Shin Utsuzawa ,  Anatoly Dementyev ,  Nicholas Heaton ,  Cole Mann

    IPC: G01R33/38 ,  G01R33/383 ,  G01N24/08 ,  G01V13/00

    Abstract: A method for fabricating a magnet on a nuclear magnetic resonance logging tool includes identifying a desired magnetic field strength at a predetermined depth of investigation, receiving a set of magnet segments configured for deployment on the logging tool in a magnet arrangement which make up a magnet array on the logging tool, processing a magnetic strength and an angular offset of selected magnet segments and their unique location in the magnet array to compute corresponding magnetic field strength solutions at the predetermined depth of investigation, selecting one magnet arrangement solution that minimizes a difference between the magnetic field strength solution and the desired magnetic field strength at the predetermined depth of investigation, and deploying the magnet segments on the logging tool according to the selected magnet arrangement solution to fabricate the magnet.

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