公开(公告)号：US10088588B2

公开(公告)日：2018-10-02

申请号：US14071716

申请日：2013-11-05

Applicant: CGG SERVICES SA

Inventor： Yu Zhang ,  Lian Duan ,  Yi Xie

IPC: G01V1/34 ,  G01V1/30

Abstract: There is a method for generating a final image of a subsurface of the earth. The method includes receiving measured seismic data d of the subsurface; selecting an objective function E that is function of a reflectivity r of the subsurface; and calculating, in a processor, the reflectivity r based on the measured seismic data d, the objective function E, simulated data {tilde over (d)}, a modeling operator M from a reverse time demigration (RTDM) process and an imaging operator MT from a reverse time migration (RTM) process.

公开(公告)号：US09329290B2

公开(公告)日：2016-05-03

申请号：US14516724

申请日：2014-10-17

Applicant: CGG Services SA

Inventor： Robert Soubaras ,  Yu Zhang

IPC: G01V1/28 ,  G01V1/36 ,  G01V1/34

CPC classification number: G01V1/345 ,  G01V1/282 ,  G01V2210/51 ,  G01V2210/675 ,  G01V2210/679 ,  G01V2210/74

Abstract: Computing device and method for processing seismic traces to produce an image of a subsurface area. The method includes receiving a series of seismic traces related to the subsurface area and recorded by one or more seismic receivers, wherein the one or more seismic sources are originally generated by a source; applying a phase encoding function to the series of seismic traces, at least a portion of said seismic traces comprise signals reflected by geological interfaces of the subsurface area; applying a 3 dimensional (3D) harmonic-source reverse time migration of the series of seismic traces encoded with the phase encoding function; computing a forward wavefield by solving a first wave equation; computing a backward wavefield by solving a second wave equation; and cross-correlating the forward wavefield with the backward wavefield to generate an image of the subsurface.

Abstract translation: 用于处理地震迹线以产生地下区域的图像的计算装置和方法。 该方法包括接收与地下区域相关的一系列地震迹线并由一个或多个地震接收器记录，其中一个或多个震源最初由源产生; 对所述一系列地震迹线施加相位编码功能，所述地震迹线的至少一部分包括由所述地下区域的地质界面反射的信号; 应用用相位编码函数编码的一系列地震迹线的三维（3D）谐波源反向时间偏移; 通过求解第一波方程来计算前向波场; 通过求解第二波方程来计算反向波场; 并将前向波场与后向波场互相关，以产生地下的图像。

公开(公告)号：US09575194B2

公开(公告)日：2017-02-21

申请号：US14278039

申请日：2014-05-15

Applicant: CGG Services SA

Inventor： Adel Khalil ,  James Sun ,  Yu Zhang ,  Gordon Poole

IPC: G01V1/28

CPC classification number: G01V1/282 ,  G01V2210/51 ,  G01V2210/679

Abstract: A method for processing seismic data includes receiving seismic data and a velocity model (c(x)) for a plurality of locations (x), scaling a dimension of the seismic data according to the velocity model (c(x)) to provide a velocity normalized seismic data, and generating a final image (S(x)) of the subsurface using the velocity normalized seismic data. The velocity normalized seismic data may be a reverse-time migration image (I(x,ξ)) corresponding to the plurality of locations (x) and a plurality of propagation distance offsets (ξ). The method may also include transforming the reverse-time migration image (I(x,ξ)) for the plurality of selected positions (x) to a wavenumber domain to provide velocity normalized wavenumber data (I(k,ψ)) and suppressing data components corresponding to non-physical or undefined reflection angles to provide enhanced wavenumber data (I′(k,ψ)) and using the enhanced wavenumber data (I′(k,ψ)) to generate the final image (S(x)). A corresponding apparatus is also disclosed herein.

Abstract translation: 一种用于处理地震数据的方法包括：对于多个位置（x）接收地震数据和速度模型（c（x）），根据速度模型（c（x））缩放地震数据的尺寸，以提供 速度归一化地震数据，并使用速度归一化地震数据生成地下的最终图像（S（x））。 速度归一化地震数据可以是对应于多个位置（x）的反向时间偏移图像（I（x，ξ））和多个传播距离偏移（ξ）。 该方法还可以包括将多个选定位置（x）的反向时间偏移图像（I（x，ξ））变换为波数域，以提供速度归一化波数数据（I（k，ψ））并抑制数据 对应于非物理或未定义的反射角的分量，以提供增强的波数数据（I'（k，ψ）），并使用增强波数数据（I'（k，ψ））来生成最终图像（S（x）） 。 本文还公开了相应的装置。