SYSTEM AND METHOD FOR VELOCITY ANALYSIS IN THE PRESENCE OF CRITICAL REFLECTIONS
    1.
    发明申请
    SYSTEM AND METHOD FOR VELOCITY ANALYSIS IN THE PRESENCE OF CRITICAL REFLECTIONS 有权
    关键反映存在的速度分析系统与方法

    公开(公告)号:US20160109592A1

    公开(公告)日:2016-04-21

    申请号:US14516975

    申请日:2014-10-17

    IPC分类号: G01V1/30 G01V1/36

    CPC分类号: G01V1/303 G01V1/282 G01V1/368

    摘要: A method is described for processing residual moveout in seismic image data gathers representing critical reflections. The method includes receiving seismic image data arranged as a function of an angle or offset parameter including a high-velocity-contrast event with post-critical. The method also includes applying a wavelet de-stretch filter to the seismic data to correct wavelet stretching. The method also includes applying a fan-filter to remove coherent noise in the one or more post-critical traces; picking residual moveout of the high-velocity-contrast event; adjacent-trace differencing to detect the impact of phase change at critical reflections in residual moveouts, and applying a median-filter to the residual moveout to reduce the impact of phase change of the high-velocity-contrast event in the one or more post-critical traces. The median-filtered and reconstructed residual moveout is used for improving a velocity model used for generating the seismic image gathers.

    摘要翻译: 描述了一种处理代表临界反射的地震图像数据采集中的残余移动的方法。 该方法包括接收地震图像数据,该地震图像数据被布置为包括具有后临界的高速对比度事件的角度或偏移参数的函数。 该方法还包括将小波去拉伸滤波器应用于地震数据以校正小波拉伸。 该方法还包括应用风扇滤波器以消除所述一个或多个后关键轨迹中的相干噪声; 选择高速对比度事件的剩余移动; 相邻轨迹差异来检测临界反射在残余偏移中的相位变化的影响,以及将中值滤波器应用于残余偏移,以减少高速对比度事件在一个或多个后处理中的相位变化的影响。 关键痕迹 中值滤波和重构的残余移动用于改进用于生成地震图像聚集的速度模型。

    SYSTEM AND METHOD FOR SEISMIC IMAGING OF A COMPLEX SUBSURFACE
    2.
    发明申请
    SYSTEM AND METHOD FOR SEISMIC IMAGING OF A COMPLEX SUBSURFACE 审中-公开
    复杂地表的地震成像系统与方法

    公开(公告)号:US20150378039A1

    公开(公告)日:2015-12-31

    申请号:US14317331

    申请日:2014-06-27

    IPC分类号: G01V1/28 G01V1/30

    摘要: Seismic data may be processed to improve a geologic model of a subsurface volume of interest by receiving an initial geologic model, generating a γ-parameter family of models by perturbing parameters of an initial geologic model, migrating the seismic data using each of the models in the γ-parameter family of models to generate a set of migration images, constructing a γ-volume by scanning the set of migration images wherein each location in the γ-volume is assigned a value representing a preference of one of the migration images; and inverting the γ-volume.

    摘要翻译: 可以处理地震数据以通过接收初始地质模型来改善地下地下体积的地质模型,通过扰动初始地质模型的参数产生γ参数族模型,使用每个模型的地震数据迁移 用于生成一组迁移图像的γ参数族,通过扫描所述一组迁移图像来构造γ体积,其中γ体积中的每个位置被分配有代表偏移图像之一的偏好的值; 并反转γ体积。

    System and method for velocity analysis in the presence of critical reflections

    公开(公告)号:US09702999B2

    公开(公告)日:2017-07-11

    申请号:US14516975

    申请日:2014-10-17

    IPC分类号: G01V1/28 G01V1/30 G01V1/36

    CPC分类号: G01V1/303 G01V1/282 G01V1/368

    摘要: A method is described for processing residual moveout in seismic image data gathers representing critical reflections. The method includes receiving seismic image data arranged as a function of an angle or offset parameter including a high-velocity-contrast event with post-critical. The method also includes applying a wavelet de-stretch filter to the seismic data to correct wavelet stretching. The method also includes applying a fan-filter to remove coherent noise in the one or more post-critical traces; picking residual moveout of the high-velocity-contrast event; adjacent-trace differencing to detect the impact of phase change at critical reflections in residual moveouts, and applying a median-filter to the residual moveout to reduce the impact of phase change of the high-velocity-contrast event in the one or more post-critical traces. The median-filtered and reconstructed residual moveout is used for improving a velocity model used for generating the seismic image gathers.

    Creating a high resolution velocity model using seismic tomography and impedance inversion
    4.
    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。

    ROBUST, LOW-OVERHEAD, APPLICATION TASK MANAGEMENT METHOD
    6.
    发明申请
    ROBUST, LOW-OVERHEAD, APPLICATION TASK MANAGEMENT METHOD 审中-公开
    稳健,低成本,应用任务管理方法

    公开(公告)号:US20150293953A1

    公开(公告)日:2015-10-15

    申请号:US14250521

    申请日:2014-04-11

    IPC分类号: G06F17/30

    摘要: Application task management (“ATM”) methods may employ a task list stored in a file on a nonvolatile information storage medium. Parallel processing instances employ an application programming interface (“API”) that enables each processing instance to individually access the task list. The access protocol enforced by the API is sufficient to provide robust, fault-tolerant behavior without requiring a specific process or daemon to be responsible for ATM. The API may employ a locking mechanism based on universal or widely-available operating system calls (such as directory creation) that implicitly or explicitly guarantee atomic operations. Each processing instance performs a check-out of unfinished tasks with a request that includes a timeout value, transforms the unfinished tasks into finished tasks, and provides a check-in of the finished tasks, and repeats. This approach supports the use of a variety of models through the use of chained or nested task lists, and it can be readily scaled.

    摘要翻译: 应用程序任务管理(“ATM”)方法可以使用存储在非易失性信息存储介质上的文件中的任务列表。 并行处理实例使用应用程序编程接口(“API”),使每个处理实例能够单独访问任务列表。 API实施的访问协议足以提供强大的容错行为,而不需要特定的进程或守护进程负责ATM。 API可以采用基于通用或广泛可用的操作系统调用(如目录创建)的锁定机制,这些调用隐含地或明确地保证原子操作。 每个处理实例使用包含超时值的请求执行未完成任务的检出,将未完成的任务转换为已完成的任务,并提供已完成任务的签入并重复执行。 这种方法支持通过使用链接或嵌套任务列表来使用各种模型,并且可以轻松地缩放。