公开(公告)号：US20160202374A1

公开(公告)日：2016-07-14

申请号：US14994908

申请日：2016-01-13

Applicant: WesternGeco L.L.C.

Inventor： Sribharath Kainkaryam ,  David Nichols ,  Robert Bloor ,  Marvin Decker

IPC: G01V1/30 ,  G01V1/28

CPC classification number: G01V1/303 ,  G01V2210/51

Abstract: Systems, methods, and computer-readable media for determining a velocity model. The method includes receiving a first velocity model having a first symmetry approximation of a media of a subterranean domain, receiving seismic data representing a subterranean formation, and determining, by operation of a processor, a second velocity model having a second symmetry approximation of the media, the second symmetry approximation being less symmetric than the first symmetry approximation. The second velocity model is determined based on an estimate of residual moveout as a function of azimuth and one or more differentials that relate one or more changes in residual moveout as a function of azimuth to one or more orthorhombic parameters. The method also including migrating the seismic data using the second velocity model.

Abstract translation: 用于确定速度模型的系统，方法和计算机可读介质。 该方法包括接收具有地下域的介质的第一对称近似的第一速度模型，接收表示地下地层的地震数据，以及通过处理器的操作确定具有介质的第二对称近似的第二速度模型 ，第二对称近似与第一对称近似较不对称。 第二速度模型基于作为方位角和一个或多个差异的函数的残余移动的估计来确定，所述差异将残余移动中的一个或多个变化作为方位角的函数与一个或多个正交参数相关联。 该方法还包括使用第二速度模型迁移地震数据。