公开(公告)号：US09869783B2

公开(公告)日：2018-01-16

申请号：US15025659

申请日：2015-09-08

Applicant: LANDMARK GRAPHICS CORPORATION

Inventor： Shengwen Jin ,  Shiyong Xu ,  Fan Xia ,  Richard Ottolini ,  Yiqing Ren

IPC: G01V1/30 ,  G01V1/38

CPC classification number: G01V1/303 ,  G01V1/38

Abstract: An example method for tomographic migration velocity analysis may include collecting seismographic traces from a subterranean formation and using an initial velocity model to generate common image gathers and a depth image volume based, at least in part, on the seismographic traces. A structure tensor may be computed with the depth image volume for automated structural dip and azimuth estimation. A semblance may be generated using said plurality of common image gathers and said structure tensor. Image depth residuals may be automatically picked from said semblance. A ray tracing computation may be performed on said initial velocity models using said structure tensor. An updated velocity model may be generated with a tomographic inversion computation, wherein said tomographic inversion computation uses said plurality of image depth residuals and said ray tracing computation.