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    TELEVIEWER IMAGE WOOD-GRAIN REDUCTION TECHNIQUES
    1.
    发明申请
    TELEVIEWER IMAGE WOOD-GRAIN REDUCTION TECHNIQUES 有权
    TELEVIEWER图像木屑减少技术

    公开(公告)号：US20140104978A1

    公开(公告)日：2014-04-17

    申请号：US14109553

    申请日：2013-12-17

    Applicant: Baker Hughes Incorporated

    Inventor： ROGER R. STEINSIEK ,  JASON M. HARRIS ,  JINSONG ZHAO ,  DOUGLAS J. PATTERSON ,  JAMES B. DOMNANISH

    IPC: G01V1/34

    CPC classification number: G01V1/345 ,  B06B1/0622 ,  G01V1/40 ,  G01V1/48

    Abstract: Measurements made by a transducer assembly for downhole imaging are affected by reverberations between the transducer and the window on the outside of the assembly. The reverberations result in a stationary noise on the image. Hardware solutions to improve signal-to-noise ratio includes using a composite transducer, adjusting the distance between the transducer and the window. SNR can also be improved by processing techniques that include stacking, fitting a sinusoid to the reverberation, by envelope peak detection, and by applying a notch filter.

    Abstract translation: 用于井下成像的换能器组件进行的测量受到传感器与组件外部的窗口之间的混响的影响。 混响导致图像上的静止噪声。 提高信噪比的硬件解决方案包括使用复合传感器，调整传感器和窗口之间的距离。 还可以通过包括堆叠，将正弦曲线拟合到混响，通过包络峰值检测以及通过应用陷波滤波器的处理技术来改善SNR。

    TELEVIEWER IMAGE WOOD-GRAIN REDUCTION TECHNIQUES
    3.
    发明申请
    TELEVIEWER IMAGE WOOD-GRAIN REDUCTION TECHNIQUES 审中-公开

    公开(公告)号：US20170212263A1

    公开(公告)日：2017-07-27

    申请号：US15409200

    申请日：2017-01-18

    Applicant: BAKER HUGHES INCORPORATED

    Inventor： ZHIJUAN ZHANG ,  DOUGLAS J. PATTERSON ,  ROGER R. STEINSIEK ,  WEI HAN

    IPC: G01V1/50 ,  E21B47/00

    CPC classification number: G01V1/50 ,  E21B47/0002 ,  E21B47/0005 ,  G01V1/34 ,  G01V1/40 ,  G01V1/52 ,  G01V2210/20 ,  G01V2210/6222 ,  G01V2210/74

    Abstract: Systems, devices, and methods for evaluating an earth formation intersected by a borehole using signals produced at a plurality of borehole depths by an ultrasonic transducer in the borehole, the signals produced by the transducer including ringdown signals from the ultrasonic transducer and echo signals from a wall of the borehole from a plurality of azimuthal orientations. Methods include using peak amplitude values and arrival time values from the signals to construct a background modulation template corresponding to at least one depth; estimating, for each respective depth of the plurality of borehole depths, an azimuthally varying interference pattern predominantly resulting from a ringdown signal for each respective depth by mapping the modulation template to arrival time values corresponding to the respective depth; and subtracting, for each respective depth, the estimated varying interference pattern from the peak amplitude values corresponding to the respective depth to generate adjusted peak amplitudes.

    Detection of High Incident Reflective Boundaries Using Near-Field Shear Waves
    4.
    发明申请
    Detection of High Incident Reflective Boundaries Using Near-Field Shear Waves 审中-公开
    使用近场剪切波检测高入射反射边界

    公开(公告)号：US20160363684A1

    公开(公告)日：2016-12-15

    申请号：US15178290

    申请日：2016-06-09

    Applicant: BAKER HUGHES INCORPORATED

    Inventor： DOUGLAS J. PATTERSON ,  EDUARDO a. CAZENEUVE

    IPC: G01V1/50 ,  E21B47/022 ,  E21B47/04

    CPC classification number: G01V1/50 ,  E21B47/02208 ,  E21B47/04 ,  G01V1/284 ,  G01V1/46 ,  G01V2210/642

    Abstract: Systems, devices and methods for evaluating an earth formation intersected by a borehole. Method include detecting a reflective boundary in the earth formation by: generating a multipole acoustic signal with a logging tool in the borehole; identifying a shear wave signal resulting from shear body waves reflected in the formation in a near-field region of the formation around the borehole responsive to the generated multipole acoustic signal; and estimating at least a depth along the borehole of the boundary based on the shear wave signal. The boundary may have an angle of incidence with respect to the borehole of greater than 70 degrees. The boundary may be at least one of i) a fracture; and ii) a fault. The method may include evaluating the boundary using at least one attribute of the shear wave signal and the estimated depth.

    Abstract translation: 用于评估钻孔相交的地层的系统，装置和方法。 方法包括：通过以下步骤检测地层中的反射边界：通过井眼中的测井工具产生多极声信号; 根据所产生的多极声信号，识别由围绕钻孔的地层的近场区域中的地层中反射的剪切体波产生的剪切波信号; 并且基于剪切波信号估计至少沿边界钻孔的深度。 该边界可以具有相对于钻孔的入射角大于70度。 边界可以是i）断裂中的至少一个; 和ii）故障。 该方法可以包括使用剪切波信号和估计深度的至少一个属性来评估边界。

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