公开(公告)号：US09442209B2

公开(公告)日：2016-09-13

申请号：US13545609

申请日：2012-07-10

Applicant: Walter Söllner ,  Okwudili Orji ,  Stian Hegna

Inventor： Walter Söllner ,  Okwudili Orji ,  Stian Hegna

IPC: G01V1/38 ,  G01V1/36

CPC classification number: G01V1/364 ,  G01V2210/56

Abstract: Computational methods and systems for deghosting marine seismic streamer data are described. In particular, an exploration-seismology vessel tows a number of streamers that form a data acquisition surface located beneath a free surface. The methods computationally deghost or substantially remove receiver ghost signals from seismic data recorded by steamer receivers. The deghosting methods include low frequency compensation to recover vertical velocity wavefield information that is typically lost due to a low signal-to-noise ratio over a low frequency range independent of the free surface conditions or the shape of the data acquisition surface.

Abstract translation: 描述了用于海洋地震拖缆数据消除重影的计算方法和系统。 特别地，探测地震学船只牵引形成位于自由表面下方的数据采集表面的多个拖缆。 该方法计算地消除重影或基本上从由火轮接收器记录的地震数据中去除接收机重影信号。 去虚反射方法包括低频补偿以恢复垂直速度波场信息，其通常由于在低频范围内的低信噪比而丧失，独立于自由表面条件或数据采集表面的形状。

公开(公告)号：US20130208565A1

公开(公告)日：2013-08-15

申请号：US13369895

申请日：2012-02-09

Applicant: Okwudili Orji ,  Walter Söllner

Inventor： Okwudili Orji ,  Walter Söllner

IPC: G01V1/38

CPC classification number: G01V1/362 ,  G01V1/3835 ,  G01V2210/56

Abstract: Computational systems and methods, to be carried out by the computational systems for determining streamer-depth bias during exploration-seismology experiments are disclosed. An exploration-seismology vessel tows a number of streamers that form a smoothly varying data acquisition surface located beneath a fluid surface. In one aspect of this disclosure, the method determines a set of image points that represent a profile of the fluid surface above each streamer. The image points are determined based on pressure and velocity wavefields measured at dual sensors of the streamer. The method then determines an elevation parameter of the image points that minimizes DC offset in a spectral domain of the image points. The elevation parameter corresponds to the streamer-depth bias and can be used to correct for the streamer-depth bias in subsequent calculations of a fluid-surface profile.

Abstract translation: 公开了用于在探测地震学实验期间确定流光 - 深度偏差的计算系统进行的计算系统和方法。 勘探地震学船只牵引许多飘带，其形成位于流体表面下方的平滑变化的数据采集表面。 在本公开的一个方面，该方法确定一组图像点，其表示每个拖缆上方的流体表面的轮廓。 基于在拖缆的双传感器测量的压力和速度波场确定图像点。 然后，该方法确定使图像点的频谱域中的DC偏移最小化的图像点的高程参数。 高程参数对应于拖缆深度偏差，并且可以用于在随后的流体表面轮廓的计算中校正流光 - 深度偏差。

公开(公告)号：US09279898B2

公开(公告)日：2016-03-08

申请号：US13369895

申请日：2012-02-09

Applicant: Okwudili Orji ,  Walter Söllner

Inventor： Okwudili Orji ,  Walter Söllner

IPC: G01V1/38 ,  G01V1/36

CPC classification number: G01V1/362 ,  G01V1/3835 ,  G01V2210/56

Abstract: Computational systems and methods to be carried out by the computational systems for determining streamer-depth bias during exploration-seismology experiments are disclosed. An exploration-seismology vessel tows a number of streamers that form a smoothly varying data acquisition surface located beneath a fluid surface. In one aspect of this disclosure, the method determines a set of image points that represent a profile of the fluid surface above each streamer. The image points are determined based on pressure and velocity wavefields measured at dual sensors of the streamer. The method then determines an elevation parameter of the image points that minimizes DC offset in a spectral domain of the image points. The elevation parameter corresponds to the streamer-depth bias and can be used to correct for the streamer-depth bias in subsequent calculations of a fluid-surface profile.

Abstract translation: 公开了用于在探索地震学实验期间确定流光 - 深度偏差的计算系统进行的计算系统和方法。 勘探地震学船只牵引许多飘带，其形成位于流体表面下方的平滑变化的数据采集表面。 在本公开的一个方面，该方法确定一组图像点，其表示每个拖缆上方的流体表面的轮廓。 基于在拖缆的双传感器测量的压力和速度波场确定图像点。 然后，该方法确定使图像点的频谱域中的DC偏移最小化的图像点的高程参数。 高程参数对应于拖缆深度偏差，并且可以用于在随后的流体表面轮廓的计算中校正流光 - 深度偏差。