Method of attenuating noise in three dimensional seismic data using a projection filter
    2.
    发明授权
    Method of attenuating noise in three dimensional seismic data using a projection filter 失效
    使用投影滤波器对三维地震数据中的噪声进行衰减的方法

    公开(公告)号:US06668228B1

    公开(公告)日:2003-12-23

    申请号:US09889239

    申请日:2001-10-09

    IPC分类号: G01V128

    摘要: A method of attenuating noise in three dimensional seismic data using a projection algorithm is disclosed. A frequency—space—space (“f-xy”) projection algorithm is used which is a generalization of the f-x projection algorithm. The predictability of the seismic signals in the f-xy domain constitutes the basis of the algorithm. Specifically it is demonstrated that if the seismic events are planar in the t-xy domain, then in the f-xy domain they consist of predictable signals in the xy-plane for each frequency f. A crucial step of the 2-D spectral factorization is achieved through the helical coordinate transformation. In addition to the disclosed general algorithm for arbitrary coherent noise, a specialized algorithm for random noise is disclosed. It has been found that the disclosed projection algorithm is effective even in extreme cases of poor signal to noise ratio. The algorithm is also signal preserving when the predictability assumptions hold.

    摘要翻译: 公开了使用投影算法来衰减三维地震数据中的噪声的方法。 使用频率空间(“f-xy”)投影算法,这是f-x投影算法的概括。 f-xy域中地震信号的可预测性构成了该算法的基础。 具体地说,如果地震事件在t-xy域是平面的,那么在f-xy域中,它们由每个频率f的xy平面中的可预测信号组成。 通过螺旋坐标变换实现2-D频谱分解的关键步骤。 除了公开的用于任意相干噪声的通用算法之外,还公开了一种用于随机噪声的专用算法。 已经发现所公开的投影算法即使在极差的信噪比的情况下也是有效的。 当可预测性假设成立时,该算法也是信号保留。

    Processing seismic data
    4.
    发明授权
    Processing seismic data 有权
    处理地震数据

    公开(公告)号:US07328109B2

    公开(公告)日:2008-02-05

    申请号:US11371808

    申请日:2006-03-09

    IPC分类号: G01V1/28

    摘要: A method of processing seismic data comprises transforming seismic data which contain coherent noise to a domain in which at least some of the coherent noise is transformed to incoherent noise. The seismic data are then filtered in the new domain, to remove or attenuate the incoherent noise. If desired, the filtered data may subsequently be transformed back to the domain in which the data were acquired. The filtering process may be carried out using a multichannel interference canceller. A seismic data trace to be filtered is input to the principal channel of the interference canceller, and one or more other seismic data traces are input to the interference canceller as reference traces. Use of seismic data traces as the reference trace(s) avoids the need to determine a noise reference trace.

    摘要翻译: 一种处理地震数据的方法包括将包含相干噪声的地震数据变换到其中至少一些相干噪声被变换成非相干噪声的区域。 然后在新的域中对地震数据进行滤波,以去除或衰减非相干噪声。 如果需要,经滤波的数据可随后被转换回获取数据的域。 滤波处理可以使用多声道干扰消除器进行。 要滤波的地震数据轨迹被输入到干扰消除器的主通道,并且一个或多个其它地震数据迹线作为参考轨迹输入到干扰消除器。 使用地震数据轨迹作为参考轨迹避免了确定噪声参考轨迹的需要。

    NOISE REMOVAL FROM 3D SEISMIC REPRESENTATION
    6.
    发明申请
    NOISE REMOVAL FROM 3D SEISMIC REPRESENTATION 有权
    从三维地震代表中消除噪声

    公开(公告)号:US20130128696A1

    公开(公告)日:2013-05-23

    申请号:US13612369

    申请日:2012-09-12

    IPC分类号: G01V1/36

    摘要: A method for removing noise from a three-dimensional representation of seismic data. The method includes receiving seismic data acquired in a seismic survey. The method may organize the acquired seismic data into a three-dimensional representation of the acquired seismic data. The method may then remove a noise from the three-dimensional representation of the acquired seismic data based on at least one criterion.

    摘要翻译: 一种从地震数据的三维表示中去除噪声的方法。 该方法包括接收地震勘测中获得的地震数据。 该方法可以将获取的地震数据组织成所获取的地震数据的三维表示。 该方法可以基于至少一个标准从所获取的地震数据的三维表示中去除噪声。

    3D deghosting of multicomponent or over/under streamer recordings using cross-line wavenumber spectra of hydrophone data
    7.
    发明授权
    3D deghosting of multicomponent or over/under streamer recordings using cross-line wavenumber spectra of hydrophone data 有权
    使用水听器数据的交叉线波数谱的多组分或超/在拖缆记录下的3D反虚反射

    公开(公告)号:US08379481B2

    公开(公告)日:2013-02-19

    申请号:US13396299

    申请日:2012-02-14

    IPC分类号: G01V1/38

    CPC分类号: G01V1/3808

    摘要: A technique includes obtaining pressure data that was acquired by seismic sensors towed as part of a three-dimensional spread of streamers and obtaining particle motion data, which are indicative of particle motion at locations of the sensors. The technique includes estimating cross-line spectra of the pressure data based at least in part on the pressure data, and the technique includes deghosting the particle motion data based at least in part on the estimated cross-line spectra.

    摘要翻译: 一种技术包括获得由作为拖缆的三维扩展的一部分拖曳的地震传感器获取的压力数据,并获得粒子运动数据,其指示在传感器的位置处的粒子运动。 该技术包括至少部分地基于压力数据来估计压力数据的交叉光谱,并且该技术包括至少部分地基于所估计的交叉线光谱使粒子运动数据消失重影。

    Seismic acquisition and filtering
    8.
    发明授权
    Seismic acquisition and filtering 有权
    地震采集和滤波

    公开(公告)号:US07584057B2

    公开(公告)日:2009-09-01

    申请号:US10585291

    申请日:2004-12-23

    IPC分类号: G01V1/36

    CPC分类号: G01V1/364 G01V2210/3246

    摘要: An iterative process is described for obtaining a finite impulse filter to remove noise from seismic data through an iterative process with constraints on the filter applied in both, the original space-time and the transform frequency wave number at each iteration step.

    摘要翻译: 描述了一种迭代过程,用于通过迭代过程获得有限冲激滤波器以消除来自地震数据的噪声,其中滤波器上的约束在每个迭代步骤中应用于原始时空和变换频率波。