公开(公告)号：US07668043B2

公开(公告)日：2010-02-23

申请号：US10904035

申请日：2004-10-20

Applicant: Peter T. Wu

Inventor： Peter T. Wu

IPC: G01V1/40

CPC classification number: G01V1/48

Abstract: Techniques for processing sonic waveform data include processing the data based on an initial set of formation-borehole parameters, to produce initial coherence peak attributes, wherein the processing is performed in a borehole; sending the initial coherence peak attributes uphole via telemetry; and correcting the initial coherence peak attributes, based on a second set of formation-borehole parameters, to produce corrected coherence peak attributes.

Abstract translation: 用于处理声波波形数据的技术包括基于地层 - 钻孔参数的初始集合处理数据，以产生初始相干峰值属性，其中在钻孔中执行处理; 通过遥测发送初始相干峰属性; 并且基于第二组地层钻孔参数来校正初始相干峰值属性，以产生校正的相干峰值属性。

公开(公告)号：US06957572B1

公开(公告)日：2005-10-25

申请号：US10710128

申请日：2004-06-21

Applicant: Peter T. Wu

Inventor： Peter T. Wu

IPC: E21B47/18 ,  E21B49/00 ,  G01V20060101 ,  G01V1/36 ,  G01V1/40 ,  G01V1/48 ,  G01V1/50

CPC classification number: G01V1/50

Abstract: A method for determining mud slowness of a mud in a borehole includes determining slowness as a function of frequency for at least one fluid mode from a set of measurements acquired with a sonic tool in the borehole; and determining the mud slowness from the slowness as a function of frequency for the at least one fluid mode. A downhole sonic tool includes a transmitter capable of generating signals covering a frequency range, a high end of which is more than 30 KHz; and a receiver array comprising a plurality of receivers, which are responsive to the frequency range of the transmitter, wherein the transmitter and the receiver array are spaced apart on a tool body at a selected TR spacing.

Abstract translation: 用于确定钻孔中泥浆的泥浆慢度的方法包括：从用钻孔中的声波工具获取的一组测量来确定作为至少一种流体模式的频率的函数的慢度; 以及根据所述至少一种流体模式的频率的函数从所述慢度确定泥浆缓慢。 井下声波工具包括能够产生覆盖频率范围的信号的发射机，其高端大于30KHz; 以及接收器阵列，其包括响应于所述发射器的频率范围的多个接收器，其中所述发射器和接收器阵列在所选择的TR间隔处在工具主体上间隔开。

公开(公告)号：US06832159B2

公开(公告)日：2004-12-14

申请号：US10249612

申请日：2003-04-23

Applicant: Jan W. Smits ,  Peter T. Wu ,  Qiming Li ,  Cheng Bing Liu

Inventor： Jan W. Smits ,  Peter T. Wu ,  Qiming Li ,  Cheng Bing Liu

IPC: G01V1100

CPC classification number: G01V11/00 ,  G01V1/50

Abstract: A method for identifying environmental effects in well log data includes selecting a plurality of models, each of the plurality of models including at least one parameter to be optimized; fitting the models to the well log data by optimizing the at least one parameter, the fitting producing a plurality of optimized models; determining an indicator of goodness of fit for each of the plurality of optimized models; and selecting a model representing a best fit of the well log data based on the indicator.

Abstract translation: 用于识别测井数据中的环境影响的方法包括选择多个模型，所述多个模型中的每个模型包括要优化的至少一个参数; 通过优化所述至少一个参数将所述模型拟合到所述测井数据，所述拟合产生多个优化模型; 确定所述多个优化模型中的每一个的适合度的指标; 并根据该指标选择表示井测井数据的最佳拟合的模型。

公开(公告)号：US09482775B2

公开(公告)日：2016-11-01

申请号：US13574665

申请日：2011-01-21

Applicant: Peter T. Wu ,  Thomas D. Barber

Inventor： Peter T. Wu ,  Thomas D. Barber

IPC: G01V3/12 ,  G01V1/42 ,  G01V3/30 ,  G06F19/00

CPC classification number: G01V3/12 ,  G01V1/42 ,  G01V3/30 ,  G06F19/00

Abstract: The present disclosure relates to a method to determine a formation property of a subsurface formation. A downhole logging tool having two or more tri-axial antennas is provided and used to obtain azimuthally sensitive data. Borehole correction is performed on the obtained data and a ZD-inversion is performed on the borehole corrected data for all antenna spacing groups. A formation indicator flag is determined and, depending on the determined formation indicator flag, a 1D-axial inversion and/or a 1D-radial inversion is performed over selected zones, or neither is performed. The best ZD-inversion results are selected and the 1D-axial inversion results and/or the 1D-radial inversion results, if any, are combined with the selected best ZD-inversion results to form a composite inversion result. The formation property of the subsurface formation is determined using the composite inversion result.

Abstract translation: 本公开涉及确定地下地层的地层特性的方法。 提供具有两个或更多个三轴天线的井下测井工具，用于获得方位角敏感数据。 对获得的数据进行钻孔校正，并对所有天线间隔组的钻孔校正数据执行ZD反转。 确定地层指示符标志，并且根据所确定的地层指示标志，在所选择的区域上执行1D轴向反演和/或1D-径向反转，或者两者都不执行。 选择最佳ZD反演结果，并将1D轴向反演结果和/或1D-径向反演结果（如果有的话）与所选择的最佳ZD反演结果组合以形成复合反演结果。 使用复合反演结果确定地下地层的形成特征。

公开(公告)号：US20140372040A1

公开(公告)日：2014-12-18

申请号：US14343358

申请日：2012-09-09

Applicant: Peter T. Wu ,  Gong Li Wang ,  Thomas D. Barber ,  Charles A. Johnson

Inventor： Peter T. Wu ,  Gong Li Wang ,  Thomas D. Barber ,  Charles A. Johnson

IPC: G01V3/38 ,  E21B47/12

CPC classification number: G01V3/38 ,  E21B47/121 ,  E21B47/124 ,  G01V3/28

Abstract: A method for logging a formation or sample includes obtaining a plurality of multiaxial conductivity measurements from the formation or sample. A horizontal resistivity measurement, a dip measurement and a dip azimuth measurement are derived from the plurality of multiaxial conductivity measurements. A sharp vertical resistivity measurement is derived from a subset of the plurality of multiaxial conductivity measurements.

Abstract translation: 记录地层或样品的方法包括从地层或样品获得多个多轴电导率测量。 从多个多轴电导率测量得出水平电阻率测量，倾角测量和倾角方位测量。 从多个多轴电导率测量的子集导出尖锐的垂直电阻率测量。

公开(公告)号：US08553493B2

公开(公告)日：2013-10-08

申请号：US11964736

申请日：2007-12-27

Applicant: Peter T. Wu ,  Alain Dumont ,  Pierre Campanac ,  David Linton Johnson

Inventor： Peter T. Wu ,  Alain Dumont ,  Pierre Campanac ,  David Linton Johnson

IPC: G01V1/40

CPC classification number: G01V1/50

Abstract: A method for estimating formation permeability from measured sonic wave Stoneley attributes and particularly the Stoneley attributes of slowness (DTst) and attenuation (ATTst), taking into consideration the existence of a heavy walled drill collar at the end of the drill string and the relative lack of borehole mud cake during a drilling operation. In the subject LWD application a real-time qualitative indication for fracture and permeable zones is estimated from Stoneley measurements. This information is useful to a driller to make important timely decisions about drilling and completion programs.

Abstract translation: 考虑到钻柱末端存在厚壁钻铤，相对缺乏的方法，用于估计测量声波斯通利属性，特别是斯通利度量（DTst）和衰减（ATTst）的地层渗透率 在钻井作业期间钻孔泥饼。 在主题LWD应用中，从Stoneley测量估计了断裂和渗透区域的实时定性指示。 这些信息对于钻井者对钻井和完井计划作出重要的及时决定是有用的。

公开(公告)号：US07764572B2

公开(公告)日：2010-07-27

申请号：US11007402

申请日：2004-12-08

Applicant: Peter T. Wu ,  Jahir Pabon

Inventor： Peter T. Wu ,  Jahir Pabon

IPC: G01V1/40

CPC classification number: G01V1/44

Abstract: A technique for processing acoustic waveforms includes: (a) transforming at least a portion of the acoustic waveforms to produce frequency-domain signals; (b) obtaining a model dispersion curve based on a borehole-formation model having a set of borehole-formation parameters; (c) adjusting phases of the frequency-domain signals according to the model dispersion curve to produce back-propagated signals; (d) computing coherence of the back-propagated signals; (e) repeating steps (b)-(d) by varying values of the set of borehole-formation parameters until the coherence reaches a selected criterion; and (f) outputting at least a portion of the set of borehole-formation parameters.

Abstract translation: 一种用于处理声波的技术包括：（a）转换至少一部分声波形以产生频域信号; （b）基于具有一组钻孔形成参数的钻孔形成模型获得模型分散曲线; （c）根据模型色散曲线调整频域信号的相位以产生反向传播的信号; （d）计算反向传播信号的相干性; （e）通过改变所述一组钻孔形成参数的值来重复步骤（b） - （d），直到所述一致性达到选定的标准; 和（f）输出该组钻孔形成参数的至少一部分。

公开(公告)号：US20090168596A1

公开(公告)日：2009-07-02

申请号：US11964734

申请日：2007-12-27

Applicant: PETER T. WU ,  ALAIN DUMONT ,  PIERRE CAMPANAC

Inventor： PETER T. WU ,  ALAIN DUMONT ,  PIERRE CAMPANAC

IPC: G01V1/40

CPC classification number: G01V1/50

Abstract: A method for estimating formation porosity and lithology on a real time basis during a logging while drilling operation using measured values of formation attenuation attributes for compression and/or shear.

Abstract translation: 一种用于在使用测量的压缩和/或剪切的地层衰减特性的测量值的同时在测井期间实时地估计地层孔隙度和岩性的方法。

公开(公告)号：US09606257B2

公开(公告)日：2017-03-28

申请号：US13217983

申请日：2011-08-25

Applicant: Peter T. Wu ,  Dong Weixin ,  Thomas D. Barber ,  Dean Homan

Inventor： Peter T. Wu ,  Dong Weixin ,  Thomas D. Barber ,  Dean Homan

IPC: G01V1/40 ,  G01V3/28

CPC classification number: G01V3/28 ,  G01V3/38

Abstract: A method for determining existence of a fracture in a formation surrounding a wellbore drilled through subsurface rock formations includes calculating vertical resistivity, horizontal resistivity, apparent formation dip, apparent formation azimuth and axial resistivity for a plurality of longitudinal instrument spacings using measurements from a triaxial induction well logging instrument disposed in the formation. A spread in the axial resistivity values is determined and the axial resistivity spread threshold therefrom. Fracture indicator values and fracture orientation values are calculated from transverse components of the triaxial induction measurements. Presence of a fracture is indicated when at least one of the fracture indicator value exceeds a selected threshold, the axial resistivity spread exceeds the spread threshold and when the apparent formation dip exceeds a selected threshold.

公开(公告)号：US08571797B2

公开(公告)日：2013-10-29

申请号：US12597977

申请日：2008-05-08

Applicant: Peter T. Wu ,  Hanming Wang ,  Gerald N. Minerbo

Inventor： Peter T. Wu ,  Hanming Wang ,  Gerald N. Minerbo

IPC: G01V3/38

CPC classification number: G01V13/00 ,  G01V1/50 ,  G01V3/38

Abstract: A method to determine one or more borehole corrected formation properties using measurements made using a logging tool disposed in a borehole penetrating an earth formation is disclosed. The measurements are used to determine an apparent conductivity tensor for the formation and, for a set of parameters, a parameter value for each parameter in a subset of the set of parameters. A parameter value for each parameter in the set of parameters not in the subset is provided and a borehole-inclusive modeled conductivity tensor is computed. The apparent conductivity tensor and the borehole-inclusive modeled conductivity tensor are iteratively used to optimize the parameter values, and the optimized parameter values are used to compute an optimized conductivity tensor. A borehole corrected conductivity tensor is computed using the optimized conductivity tensor, and the borehole corrected formation properties are determined using the borehole corrected conductivity tensor and/or the optimized parameter values.

Abstract translation: 公开了一种使用设置在穿透地层的钻孔中的测井工具进行的测量来确定一个或多个钻孔校正地层特性的方法。 测量用于确定形成的表观电导率张量，并且对于一组参数，确定该组参数的子集中的每个参数的参数值。 提供不在子集中的参数集中的每个参数的参数值，并计算包含井眼的建模的电导率张量。 迭代地使用表观电导率张量和含钻孔的建模的电导率张量来优化参数值，并且使用优化的参数值来计算优化的电导率张量。 使用优化的电导率张量计算钻孔校正的电导率张量，并且使用钻孔校正的电导率张量和/或优化的参数值来确定钻孔校正的形成性质。