公开(公告)号：US09939541B2

公开(公告)日：2018-04-10

申请号：US14593368

申请日：2015-01-09

Applicant: Chevron U.S.A. Inc.

Inventor： Chang Li ,  Sudipta Sarkar ,  Chunquan Yu

IPC: G01V1/00 ,  G01V1/28 ,  G01V1/30 ,  E21B43/26 ,  G01V1/50

CPC classification number: G01V1/288 ,  E21B43/26 ,  G01V1/282 ,  G01V1/305 ,  G01V1/50 ,  G01V2210/123 ,  G01V2210/1234 ,  G01V2210/1429 ,  G01V2210/65 ,  G01V2210/66

Abstract: A method for locating a microseismic event in a subsurface formation, in some embodiments, comprises: receiving a microseismic signal at a detector; obtaining a velocity model representative of the subsurface formation, the velocity model comprising multiple velocity layers; estimating, for each of the multiple velocity layers in the subsurface formation, a microseismic event location and a microseismic event origin time; and selecting one of the estimated locations and times using a parameter of the microseismic signal received at the detector.

公开(公告)号：US09952341B2

公开(公告)日：2018-04-24

申请号：US14565117

申请日：2014-12-09

Applicant: Chevron U.S.A. Inc.

Inventor： Nicholas D. Holschuh ,  Chang Li ,  Mark A. Meadows ,  Steven Dobbs

IPC: G01V1/30 ,  G01V1/36

CPC classification number: G01V1/308 ,  G01V1/303 ,  G01V1/36 ,  G01V2210/57 ,  G01V2210/58 ,  G01V2210/612 ,  G01V2210/6222

Abstract: Systems, methods, and mediums may implement obtaining baseline traces of a baseline seismic survey and monitor traces of a monitor seismic survey; employing a computer to align the monitor traces to corresponding baseline traces using an error function having a phase-based component, thereby obtaining an aligned monitor survey; generating with the computer a comparison of the aligned monitor survey to the baseline seismic survey; and using the comparison of the aligned monitor survey to the baseline seismic survey to determine a change in the subterranean hydrocarbon producing reservoir.