公开(公告)号：US20150362611A1

公开(公告)日：2015-12-17

申请号：US14550001

申请日：2014-11-21

Applicant: PGS Geophysical AS

Inventor： Didier B. P. Lecerf ,  Nizar Chemingui ,  Alejandro A. Valenciano Mavilio ,  Shaoping Lu

IPC: G01V1/34

CPC classification number: G01V1/28 ,  G01V2210/1293 ,  G01V2210/1423 ,  G01V2210/56 ,  G01V2210/57

Abstract: Techniques are disclosed relating to geophysical analysis. In one embodiment, a method includes receiving seismic data for a geophysical formation recorded during a seismic survey using one or more seabed sensors and one or more sources. In this embodiment, the method includes determining a seismic gather for a location in the geophysical formation, modifying the seismic gather by interchanging source-receiver definitions for the seismic gather, and imaging the location using the modified gather. In this embodiment, the imaging uses higher-order reflections recorded in the seismic gather. In some embodiments, the method includes separating up-going and down-going wavefields and separately imaging using the up-going wavefield and the down-going wavefield.

Abstract translation: 公开了与地球物理分析有关的技术。 在一个实施例中，一种方法包括使用一个或多个海底传感器和一个或多个源接收在地震勘测期间记录的地球物理地层的地震数据。 在该实施例中，该方法包括确定用于地球物理地层中的位置的地震采集，通过交换地震采集的源 - 接收机定义来修改地震采集，以及使用修改的集合对位置进行成像。 在该实施例中，成像使用记录在地震采集中的高阶反射。 在一些实施例中，该方法包括使用上行波场和下行波场分离上行和下行波场并分开成像。

公开(公告)号：US10690792B2

公开(公告)日：2020-06-23

申请号：US16509009

申请日：2019-07-11

Applicant: PGS Geophysical AS

Inventor： Grunde Rønholt ,  Nizar Chemingui ,  Alejandro Antonio Valenciano Mavilio ,  Shaoping Lu

IPC: G01V1/36 ,  G01V1/30 ,  G01V1/38 ,  G01V1/28

Abstract: Amplitude-versus-angle analysis for quantitative interpretation can include creation of a plurality of angle gathers from imaging a subsurface location with multiples in a near-offset range and imaging primaries outside the near-offset range and application of an amplitude-versus-angle analysis to the plurality of angle gathers to produce a quantitative interpretation pertaining to the subsurface location.

公开(公告)号：US20190187313A1

公开(公告)日：2019-06-20

申请号：US16350083

申请日：2018-09-21

Applicant: PGS Geophysical AS

Inventor： Nizar Chemingui ,  Alejandro A. Valenciano Mavilio ,  Faqi Liu ,  Shaoping Lu

IPC: G01V1/34 ,  G01V1/38 ,  G01V1/36 ,  G01V1/30

CPC classification number: G01V1/345 ,  G01V1/303 ,  G01V1/362 ,  G01V1/38 ,  G01V2210/32 ,  G01V2210/44 ,  G01V2210/51

Abstract: This disclosure describes processes and systems for generating a seismic image of a subterranean formation from recorded seismic data gathers obtained in a marine seismic survey of the subterranean formation. The seismic data comprises recorded pressure and vertical velocity wavefields that are used to separate the recorded pressure wavefield into upgoing and downgoing pressure wavefields. A seismic image is computed from the subterranean formation based on a product of the downgoing pressure wavefield and a migration operator applied to the upgoing pressure wavefield. The downgoing pressure wavefield is a boundary source wavefield and the upgoing pressure wavefield is boundary receiver wavefield of the migration operator. The seismic image is iteratively updated by computing a residual seismic image based on the upgoing pressure wavefield and adding the residual seismic image to the seismic image. The final seismic image displays increased illumination and reduced crosstalk artifacts compared to conventional seismic imaging techniques.

公开(公告)号：US09689999B2

公开(公告)日：2017-06-27

申请号：US14550001

申请日：2014-11-21

Applicant: PGS Geophysical AS

Inventor： Didier B. P. Lecerf ,  Nizar Chemingui ,  Alejandro A. Valenciano Mavilio ,  Shaoping Lu

IPC: G01V1/34 ,  G01V1/28 ,  G01V1/38

CPC classification number: G01V1/28 ,  G01V2210/1293 ,  G01V2210/1423 ,  G01V2210/56 ,  G01V2210/57

Abstract: Techniques are disclosed relating to geophysical analysis. In one embodiment, a method includes receiving seismic data for a geophysical formation recorded during a seismic survey using one or more seabed sensors and one or more sources. In this embodiment, the method includes determining a seismic gather for a location in the geophysical formation, modifying the seismic gather by interchanging source-receiver definitions for the seismic gather, and imaging the location using the modified gather. In this embodiment, the imaging uses higher-order reflections recorded in the seismic gather. In some embodiments, the method includes separating up-going and down-going wavefields and separately imaging using the up-going wavefield and the down-going wavefield.

公开(公告)号：US20160245941A1

公开(公告)日：2016-08-25

申请号：US15012961

申请日：2016-02-02

Applicant: PGS Geophysical AS

Inventor： Grunde Rønholt ,  Nizar Chemingui ,  Alejandro Antonio Valenciano Mavilio ,  Shaoping Lu

IPC: G01V1/30 ,  G01V1/36 ,  G01V1/28

CPC classification number: G01V1/306 ,  G01V1/282 ,  G01V1/30 ,  G01V1/368 ,  G01V2210/632

Abstract: Amplitude-versus-angle analysis for quantitative interpretation can include creation of a plurality of angle gathers from imaging a subsurface location with multiples in a near-offset range and imaging primaries outside the near-offset range and application of an amplitude-versus-angle analysis to the plurality of angle gathers to produce a quantitative interpretation pertaining to the subsurface location.

Abstract translation: 用于定量解释的幅度 - 角度分析可以包括通过在近偏移范围内的多个像素对地下位置进行成像而创建多个角度集合，并且在近偏移范围之外成像原色并且应用幅度对角度分析 到多个角度集合以产生与地下位置有关的定量解释。