Creating a high resolution velocity model using seismic tomography and impedance inversion
    1.
    发明授权
    Creating a high resolution velocity model using seismic tomography and impedance inversion 有权
    使用地震层析和阻抗反演创建高分辨率速度模型

    公开(公告)号:US09470811B2

    公开(公告)日:2016-10-18

    申请号:US14539630

    申请日:2014-11-12

    IPC分类号: G01V1/28 G01V1/40 G01V1/30

    摘要: A method is described for of creating a high-resolution velocity model of a geological medium that includes generating a long-wavelength anisotropic velocity model using tomographic inversion of seismic data gathers and combining the long-wavelength velocity model with an attenuation model. The method further includes performing prestack depth migration on the seismic data gathers using the long-wavelength velocity and attenuation model to produce seismic image gathers, applying a dip-consistent filter to the seismic image gathers, and transforming the filtered seismic image gathers to the time domain. The method further includes generating a full-band impedance model by performing impedance inversion of the time-domain filtered seismic image gathers using the long-wavelength velocity and attenuation model. The full-band impedance or velocity model is calibrated in the frequency domain in a manner independent of the spatial coordinates. The full-band impedance or velocity model is used for detecting fluid pressure anomalies in the geological medium.

    摘要翻译: 描述了一种用于创建地质介质的高分辨率速度模型的方法,其包括使用地震数据采集的层析反演生成长波长各向异性速度模型,并将长波长速度模型与衰减模型相结合。 该方法还包括使用长波长速度和衰减模型对地震数据采集进行叠前深度偏移,以产生地震图像采集,对地震图像采集应用一致滤波器,将滤波后的地震图像采集变换为时间 域。 该方法还包括通过使用长波长速度和衰减模型执行时域滤波的地震图像采集的阻抗反演来产生全频带阻抗模型。 全频带阻抗或速度模型在频域中以与空间坐标无关的方式进行校准。 全波段阻抗或速度模型用于检测地质介质中的流体压力异常。

    CREATING A HIGH RESOLUTION VELOCITY MODEL USING SEISMIC TOMOGRAPHY AND IMPEDANCE INVERSION
    2.
    发明申请
    CREATING A HIGH RESOLUTION VELOCITY MODEL USING SEISMIC TOMOGRAPHY AND IMPEDANCE INVERSION 有权
    使用地震记录和阻抗反演创建高分辨率速度模型

    公开(公告)号:US20160131781A1

    公开(公告)日:2016-05-12

    申请号:US14539630

    申请日:2014-11-12

    IPC分类号: G01V1/28

    摘要: A method is described for of creating a high-resolution velocity model of a geological medium that includes generating a long-wavelength anisotropic velocity model using tomographic inversion of seismic data gathers and combining the long-wavelength velocity model with an attenuation model. The method further includes performing prestack depth migration on the seismic data gathers using the long-wavelength velocity and attenuation model to produce seismic image gathers, applying a dip-consistent filter to the seismic image gathers, and transforming the filtered seismic image gathers to the time domain. The method further includes generating a full-band impedance model by performing impedance inversion of the time-domain filtered seismic image gathers using the long-wavelength velocity and attenuation model. The full-band impedance or velocity model is calibrated in the frequency domain in a manner independent of the spatial coordinates. The full-band impedance or velocity model is used for detecting fluid pressure anomalies in the geological medium.

    摘要翻译: 描述了一种用于创建地质介质的高分辨率速度模型的方法,其包括使用地震数据采集的层析反演生成长波长各向异性速度模型,并将长波长速度模型与衰减模型相结合。 该方法还包括使用长波长速度和衰减模型对地震数据采集进行叠前深度偏移,以产生地震图像采集,对地震图像采集应用一致滤波器,将滤波后的地震图像采集变换为时间 域。 该方法还包括通过使用长波长速度和衰减模型执行时域滤波的地震图像采集的阻抗反演来产生全频带阻抗模型。 全频带阻抗或速度模型在频域中以与空间坐标无关的方式进行校准。 全波段阻抗或速度模型用于检测地质介质中的流体压力异常。