公开(公告)号：US09529105B2

公开(公告)日：2016-12-27

申请号：US14388197

申请日：2012-04-02

申请人： Mark Vincent Collins ,  Arthur Cheng

发明人： Mark Vincent Collins ,  Arthur Cheng

IPC分类号： G01V1/34 ,  G01V1/50 ,  G01V1/40

CPC分类号： G01V1/345 ,  G01V1/40 ,  G01V1/50 ,  G01V2210/626 ,  G01V2210/74

摘要： Acoustic logging systems and methods are provided with multi-mode inversion for at least vertical shear slowness and shear anisotropy. At least some method embodiments acquire waveforms for multiple acoustic wave modes as a function of tool position in a borehole, derive position-dependent mode dispersion curves from the waveforms, match the derived dispersion curves with parameterized dispersion curves to determine a vertical shear slowness and a shear anisotropy as a function of position, and displaying a borehole log that represents at least one of the vertical shear slowness and the shear anisotropy as a function of position. The objective function employed for the inversion is evaluated across multiple wave propagation modes and mud slownesses and may employ an adaptive, frequency-dependent weighting based on distance between the derived dispersion curves and the parameterized dispersion curves.

摘要翻译： 声学测井系统和方法具有至少垂直剪切慢度和剪切各向异性的多模式反演。 至少一些方法实施例获取作为钻孔中的工具位置的函数的多个声波模式的波形，从波形导出与位置相关的模式色散曲线，使衍生的色散曲线与参数化的色散曲线匹配，以确定垂直剪切慢度 剪切各向异性作为位置的函数，并且显示表示作为位置的函数的垂直剪切慢度和剪切各向异性中的至少一个的井眼对数。 通过多波传播模式和泥浆慢度评估用于反演的目标函数，并且可以采用基于派生色散曲线和参数化色散曲线之间的距离的自适应频率相关加权。

公开(公告)号：US20150049585A1

公开(公告)日：2015-02-19

申请号：US14388197

申请日：2012-04-02

申请人： Mark Vincent Collins ,  Arthur Cheng

发明人： Mark Vincent Collins ,  Arthur Cheng

IPC分类号： G01V1/34

CPC分类号： G01V1/345 ,  G01V1/40 ,  G01V1/50 ,  G01V2210/626 ,  G01V2210/74

摘要： Acoustic logging systems and methods are provided with multi-mode inversion for at least vertical shear slowness and shear anisotropy. At least some method embodiments acquire waveforms for multiple acoustic wave modes as a function of tool position in a borehole, derive position-dependent mode dispersion curves from the waveforms, match the derived dispersion curves with parameterized dispersion curves to determine a vertical shear slowness and a shear anisotropy as a function of position, and displaying a borehole log that represents at least one of the vertical shear slowness and the shear anisotropy as a function of position. The objective function employed for the inversion is evaluated across multiple wave propagation modes and mud slownesses and may employ an adaptive, frequency-dependent weighting based on distance between the derived dispersion curves and the parameterized dispersion curves.

摘要翻译： 声学测井系统和方法具有至少垂直剪切慢度和剪切各向异性的多模式反演。 至少一些方法实施例获取作为钻孔中的工具位置的函数的多个声波模式的波形，从波形导出与位置相关的模式色散曲线，使衍生的色散曲线与参数化的色散曲线匹配以确定垂直剪切慢度 剪切各向异性作为位置的函数，并且显示表示作为位置的函数的垂直剪切慢度和剪切各向异性中的至少一个的井眼对数。 通过多波传播模式和泥浆慢度评估用于反演的目标函数，并且可以采用基于派生色散曲线和参数化色散曲线之间的距离的自适应频率相关加权。