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    Downhole NMR processing
    1.
    发明授权
    Downhole NMR processing 有权
    井下NMR处理

    公开(公告)号：US07193414B2

    公开(公告)日：2007-03-20

    申请号：US10828812

    申请日：2004-04-21

    申请人： Thomas Kruspe ,  Christian Kiesl ,  Holger Thern ,  Hartmut Schrader

    发明人： Thomas Kruspe ,  Christian Kiesl ,  Holger Thern ,  Hartmut Schrader

    IPC分类号： G01V3/00

    CPC分类号： E21B33/1243 ,  E21B43/26 ,  E21B49/008 ,  E21B49/06 ,  E21B49/10 ,  E21B2041/0028 ,  G01V3/32

    摘要： An expert system is included in a downhole processor designed to acquire and process NMR data downhole in real time. The downhole processor controls the acquisition of the NMR data based at least in part on instructions transmitted downhole from a surface location and at least in part on evaluation of downhole conditions by the expert system. The downhole conditions include drilling operation conditions (including motion sensors) as well as lithology and fluid content of the formation obtained from other MWD data. The wait time, number of echos, number of repetitions of an echo sequence, interecho time, bandwidth and shape of the tipping and refocusing pulses may be dynamically changed. Data processing is a combination of standard evaluation techniques. Selected data and diagnostics are transmitted uphole. The expert system may be implemented as a two stage neural net. The first stage does the formation evaluation and the second stage controls the NMR pulse sequence.

    摘要翻译： 专家系统包括在井下处理器中，旨在实时获取和处理核磁共振数据。 井下处理器至少部分地基于从地面位置向井下传输的指令并且至少部分地由专家系统评估井下状况来控制NMR数据的采集。 井下条件包括钻井作业条件（包括运动传感器）以及从其他MWD数据获得的地层的岩性和流体含量。 可以动态地改变等待时间，回波次数，回波序列的重复次数，间歇时间，带宽和倾翻和重聚焦脉冲的形状。 数据处理是标准评估技术的组合。 选定的数据和诊断功能在井下传输。 专家系统可以实现为两阶段神经网络。 第一阶段进行地层评价，第二阶段控制NMR脉冲序列。

    Downhole NMR processing
    2.
    发明授权
    Downhole NMR processing 有权
    井下NMR处理

    公开(公告)号：US06727696B2

    公开(公告)日：2004-04-27

    申请号：US09928768

    申请日：2001-08-13

    申请人： Thomas Kruspe ,  Christian Kiesl ,  Holger Thern ,  Hartmut Schrader

    发明人： Thomas Kruspe ,  Christian Kiesl ,  Holger Thern ,  Hartmut Schrader

    IPC分类号： G01V300

    CPC分类号： E21B33/1243 ,  E21B43/26 ,  E21B49/008 ,  E21B49/06 ,  E21B49/10 ,  E21B2041/0028 ,  G01V3/32

    摘要： An expert system is included in a downhole processor designed to acquire and process NMR data downhole in real time. The downhole processor controls the acquisition of the NMR data based at least in part on instructions transmitted downhole from a surface location and at least in part on evaluation of downhole conditions by the expert system. The downhole conditions include drilling operation conditions (including motion sensors) as well as lithology and fluid content of the formation obtained from other MWD data. The wait time, number of echos, number of repetitions of an echo sequence, interecho time, bandwidth and shape of the tipping and refocusing pulses may be dynamically changed. Data processing is a combination of standard evaluation techniques. Selected data and diagnostics are transmitted uphole. The expert system may be implemented as a two stage neural net. The first stage does the formation evaluation and the second stage controls the NMR pulse sequence.

    摘要翻译： 专家系统包括在井下处理器中，旨在实时获取和处理核磁共振数据。 井下处理器至少部分地基于从地面位置向井下传输的指令并且至少部分地由专家系统评估井下状况来控制NMR数据的采集。 井下条件包括钻井作业条件（包括运动传感器）以及从其他MWD数据获得的地层的岩性和流体含量。 可以动态地改变等待时间，回波次数，回波序列的重复次数，间歇时间，带宽和倾翻和重聚焦脉冲的形状。 数据处理是标准评估技术的组合。 选定的数据和诊断功能在井下传输。 专家系统可以实现为两阶段神经网络。 第一阶段进行地层评价，第二阶段控制NMR脉冲序列。

    Reduction of motion artifacts in NMR
    3.
    发明授权
    Reduction of motion artifacts in NMR 有权
    降低NMR中的运动伪影

    公开(公告)号：US07180287B2

    公开(公告)日：2007-02-20

    申请号：US10839478

    申请日：2004-05-05

    申请人： Peter Rottengatter ,  Holger Thern ,  Radu Fechete ,  Martin Blanz ,  Thomas Kruspe

    发明人： Peter Rottengatter ,  Holger Thern ,  Radu Fechete ,  Martin Blanz ,  Thomas Kruspe

    IPC分类号： G01V3/00

    CPC分类号： G01V3/32

    摘要： NMR spin echo signals, acquired on a MWD logging tool, are susceptible to errors magnetic flux density has a gradient and the magnet on the logging tool is moving relative to the earth. The errors can be corrected by having the excitation pulse cover a smaller or a larger volume than the refocusing pulses. Correction may also be made by selective saturation, or by echo averaging.

    摘要翻译： 在MWD测井工具上获取的NMR自旋回波信号容易受到误差的影响，磁通密度具有梯度，而测井工具上的磁体相对于地球运动。 可以通过使激发脉冲覆盖比重新聚焦脉冲更小或更大的体积来校正误差。 还可以通过选择性饱和或通过回波平均来进行校正。

    Reduction of motion artifacts in NMR
    5.
    发明申请
    Reduction of motion artifacts in NMR 有权
    降低NMR中的运动伪影

    公开(公告)号：US20050248342A1

    公开(公告)日：2005-11-10

    申请号：US10839478

    申请日：2004-05-05

    申请人： Peter Rottengatter ,  Holger Thern ,  Radu Fechete ,  Martin Blanz ,  Thomas Kruspe

    发明人： Peter Rottengatter ,  Holger Thern ,  Radu Fechete ,  Martin Blanz ,  Thomas Kruspe

    IPC分类号： G01V3/32 ,  G01V3/00

    CPC分类号： G01V3/32

    摘要： NMR spin echo signals, acquired on a MWD logging tool, are susceptible to errors magnetic flux density has a gradient and the magnet on the logging tool is moving relative to the earth. The errors can be corrected by having the excitation pulse cover a smaller or a larger volume than the refocusing pulses. Correction may also be made by selective saturation, or by echo averaging.

    摘要翻译： 在MWD测井工具上获取的NMR自旋回波信号容易受到误差的影响，磁通密度具有梯度，而测井工具上的磁体相对于地球运动。 可以通过使激发脉冲覆盖比重新聚焦脉冲更小或更大的体积来校正误差。 还可以通过选择性饱和或通过回波平均来进行校正。

    NMR Echo Train Compression
    6.
    发明申请
    NMR Echo Train Compression 审中-公开
    NMR回波列车压缩

    公开(公告)号：US20080036457A1

    公开(公告)日：2008-02-14

    申请号：US11845983

    申请日：2007-08-28

    申请人： Holger Thern ,  Mouin Hamdan ,  Thomas Kruspe

    发明人： Holger Thern ,  Mouin Hamdan ,  Thomas Kruspe

    IPC分类号： G01V3/14

    CPC分类号： G01V3/32 ,  G01N24/081 ,  G01R33/3692 ,  G01R33/3808 ,  G01R33/448 ,  G01R33/5608 ,  G01R33/5617

    摘要： NMR spin echo signals are acquired downhole. A partial least squares method is used to determine parameters of a parametric model of the T2 distribution whose output matches the measurements. The model parameters are telemetered to the surface where the properties of the formation are reconstructed. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).

    摘要翻译： NMR自旋回波信号在井下采集。 使用偏最小二乘法来确定输出与测量值匹配的T 2 2分布的参数模型的参数。 将模型参数遥测到重建地层特性的地表。 要强调的是，该摘要被提供以符合要求抽象的规则，这将允许搜索者或其他读者快速确定技术公开的主题。 提交它的理解是，它不会用于解释或限制权利要求的范围或含义。 37 CFR 1.72（b）。

    Rock properties prediction, categorization, and recognition from NMR echo-trains using linear and nonlinear regression
    8.
    发明授权
    Rock properties prediction, categorization, and recognition from NMR echo-trains using linear and nonlinear regression 有权
    使用线性和非线性回归的NMR回波列车的岩石性质预测，分类和识别

    公开(公告)号：US07495436B2

    公开(公告)日：2009-02-24

    申请号：US11084322

    申请日：2005-03-18

    申请人： Mouin Hamdan ,  Holger Thern

    发明人： Mouin Hamdan ,  Holger Thern

    IPC分类号： G01V3/00 ,  G01R33/20

    CPC分类号： G01V3/32 ,  G01N24/081 ,  Y02A90/344

    摘要： A partial least squares (PLS) regression relates spin echo signals with samples having a known parameter such as bound water (BW), clay bound water (CBW), bound volume irreducible (BVI), porosity (PHI) and effective porosity (PHE). The regression defines a predictive model that is validated and can then be applied to spin echo signals of unknown samples to directly give an estimate of the parameter of interest. The unknown samples may include earth formations in which a NMR sensor assembly is conveyed in a borehole.

    摘要翻译： 偏最小二乘法（PLS）回归将自旋回波信号与已知参数如结合水（BW），粘土结合水（CBW），结合体积不可约（BVI），孔隙率（PHI）和有效孔隙率（PHE） 。 回归定义了一个经过验证的预测模型，然后可以应用于未知样本的自旋回波信号，直接给出目标参数的估计。 未知的样品可以包括在钻孔中传送NMR传感器组件的地层。

    Rock properties prediction, categorization, and recognition from NMR echo-trains using linear and nonlinear regression
    9.
    发明申请
    Rock properties prediction, categorization, and recognition from NMR echo-trains using linear and nonlinear regression 有权
    使用线性和非线性回归的NMR回波列车的岩石性质预测，分类和识别

    公开(公告)号：US20050206378A1

    公开(公告)日：2005-09-22

    申请号：US11084322

    申请日：2005-03-18

    申请人： Mouin Hamdan ,  Holger Thern

    发明人： Mouin Hamdan ,  Holger Thern

    IPC分类号： G01R33/44 ,  G01V3/00 ,  G01V3/32

    CPC分类号： G01V3/32 ,  G01N24/081 ,  Y02A90/344

    摘要： A partial least squares (PLS) regression relates spin echo signals with samples having a known parameter such as bound water (BW), clay bound water (CBW), bound volume irreducible (BVI), porosity (PHI) and effective porosity (PHE). The regression defines a predictive model that is validated and can then be applied to spin echo signals of unknown samples to directly give an estimate of the parameter of interest. The unknown samples may include earth formations in which a NMR sensor assembly is conveyed in a borehole.

    摘要翻译： 偏最小二乘法（PLS）回归将自旋回波信号与已知参数如结合水（BW），粘土结合水（CBW），结合体积不可约（BVI），孔隙率（PHI）和有效孔隙率（PHE） 。 回归定义了一个经过验证的预测模型，然后可以应用于未知样本的自旋回波信号，直接给出目标参数的估计。 未知的样品可以包括在钻孔中传送NMR传感器组件的地层。

    Method for correcting downhole NMR data contaminated by borehole signals
    10.
    发明授权
    Method for correcting downhole NMR data contaminated by borehole signals 有权
    校正井眼信号污染的井下NMR数据的方法

    公开(公告)号：US06603310B2

    公开(公告)日：2003-08-05

    申请号：US09896463

    申请日：2001-06-29

    申请人： Dan T. Georgi ,  Songhua Chen ,  Holger Thern

    发明人： Dan T. Georgi ,  Songhua Chen ,  Holger Thern

    IPC分类号： G01V300

    CPC分类号： G01V3/32

    摘要： NMR measurements made in a borehole are susceptible to contamination by signals from the borehole fluid. Correction is made for this contamination by using a standoff measuring device to determine the fractional volume of the region of investigation of the NMR tool that lies within the borehole. Using known or determined characteristics of the borehole fluid, a correction is made either to the NMR signals prior to processing or to the processed results of the uncorrected signals.

    摘要翻译： 在井眼中进行的NMR测量易受来自井眼流体的信号的污染。 通过使用支座测量装置来确定位于钻孔内的NMR工具的调查区域的分数体积来进行这种污染的校正。 使用井眼流体的已知或确定的特征，对处理之前的NMR信号或未校正信号的处理结果进行校正。