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公开(公告)号：US10359526B2
公开(公告)日：2019-07-23
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
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.
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公开(公告)号：US11609349B2
公开(公告)日：2023-03-21
申请号：US17060763
申请日：2020-10-01
Applicant: PGS Geophysical AS
Inventor： Norman Daniel Whitmore, Jr. , Jaime Ramos-Martinez , Sean Crawley , Yang Yang , Alejandro Antonio Valenciano Mavilio , Nizar Chemingui
Abstract: Methods and systems described herein are directed to determining properties of a subterranean formation using an acoustic wave-equation with a novel formulation in terms of a velocity model and a reflectivity model of the subterranean formation. The acoustic wave equation may be used with full-waveform inversion to build high-resolution velocity and reflectivity models of a subterranean formation. The acoustic wave equation may be also used with least-squares reverse time migration in the image and space domains, to build a reflectivity model of the subterranean formation with enhanced resolution and amplitude fidelity. The velocity and reflectivity models of materials that form the subterranean formation reveal the structure and lithology of features of the subterranean formation and may reveal the presence of oil and natural gas reservoirs.
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公开(公告)号：US10353092B2
公开(公告)日：2019-07-16
申请号：US15364585
申请日：2016-11-30
Applicant: PGS Geophysical AS
Inventor： Sean Crawley , Jaime Ramos-Martinez , Alejandro Antonio Valenciano Mavilio , Nizar Chemingui
Abstract: The present disclosure is related to a velocity model update with a full waveform inversion gradient. At least one method can include updating a velocity model of a subsurface, which can include suppressing high wavenumber components of the velocity model provided by reflected energy with a decomposed full waveform inversion gradient. Low wavenumber components can be preserved in the velocity model.
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4.发明授权公开(公告)号：US09651695B2
公开(公告)日：2017-05-16
申请号：US14337957
申请日：2014-07-22
Applicant: PGS Geophysical AS
Inventor： Shaoping Lu , Norman Daniel Whitmore, Jr. , Alejandro Antonio Valenciano Mavilio , Nizar Chemingui , Andrew Long , Grunde Rønholt
CPC classification number: G01V1/36 , G01V1/284 , G01V1/38 , G01V2210/56 , G01V2210/632 , G01V2210/74
Abstract: One embodiment relates to a technological process for identifying a potential subsurface structure below a body of water. Three-dimensional seismic sensor data that includes at least two measured components is obtained. Up-going and down-going wavefields comprising multiples wavefields are constructed from the three-dimensional seismic sensor data by applying wavefield separation. The up-going and down-going wavefields are extrapolated to a reflector surface below a water bottom. An imaging condition is applied at the reflector surface to generate images that include information from the multiples wavefields. Angle gathers are constructed, where each angle gather is constructed by gathering the images generated using the multiples wavefields for a range of illumination angles. Other embodiments, aspects and features are also disclosed.
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公开(公告)号：US10401517B2
公开(公告)日：2019-09-03
申请号：US14991416
申请日：2016-01-08
Applicant: PGS Geophysical AS
Abstract: Crosstalk attenuation for seismic imaging can include creation of a seismic image based on seismic data including multiples. The seismic image can include causal crosstalk and anti-causal crosstalk. Causal crosstalk and anti-causal crosstalk can be predicted based on the seismic data. The predicted causal crosstalk and the predicted anti-causal crosstalk can be attenuated from the seismic image.
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Patent Agency Ranking
公开(公告)号：US10393901B2
公开(公告)日：2019-08-27
申请号：US15238460
申请日：2016-08-16
Applicant: PGS Geophysical AS
Inventor： Shaoping Lu , Norman Daniel Whitmore, Jr. , Alejandro Antonio Valenciano Mavilio , Nizar Chemingui
Abstract: Methods and systems of generating seismic images from primaries and multiples are described. Methods separate pressure data into up-going pressure data and down-going pressure data from pressure data and vertical velocity data. Irregularly spaced receiver coordinates of the down-going and up-going pressure data are regularized to grid points of a migration grid and interpolation is used to fill in down-going and up-going pressure data at grid points of the migration grid. A seismic image is calculated at grid points of the migration grid based on the interpolated and regularized down-going pressure data and the interpolated and regularized up-going pressure data. The seismic images are high-resolution, have lower signal-to-noise ratio than seismic images generated by other methods, and have reduced acquisition artifacts and crosstalk effects.
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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
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.
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公开(公告)号：US20170168178A1
公开(公告)日：2017-06-15
申请号：US15364585
申请日：2016-11-30
Applicant: PGS Geophysical AS
Inventor： Sean Crawley , Jaime Ramos-Martinez , Alejandro Antonio Valenciano Mavilio , Nizar Chemingui
CPC classification number: G01V1/303 , G01V1/282 , G01V1/306 , G01V1/38 , G01V2210/614 , G01V2210/67
Abstract: The present disclosure is related to a velocity model update with a full waveform inversion gradient. At least one method can include updating a velocity model of a subsurface, which can include suppressing high wavenumber components of the velocity model provided by reflected energy with a decomposed full waveform inversion gradient. Low wavenumber components can be preserved in the velocity model.
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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
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。
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公开(公告)号：US20210103065A1
公开(公告)日：2021-04-08
申请号：US17060763
申请日：2020-10-01
Applicant: PGS Geophysical AS
Inventor： Norman Daniel Whitmore, JR. , Jaime Ramos-Martinez , Sean Crawley , Yang Yang , Alejandro Antonio Valenciano Mavilio , Nizar Chemingui
Abstract: Methods and systems described herein are directed to determining properties of a subterranean formation using an acoustic wave-equation with a novel formulation in terms of a velocity model and a reflectivity model of the subterranean formation. The acoustic wave equation may be used with full-waveform inversion to build high-resolution velocity and reflectivity models of a subterranean formation. The acoustic wave equation may be also used with least-squares reverse time migration in the image and space domains, to build a reflectivity model of the subterranean formation with enhanced resolution and amplitude fidelity. The velocity and reflectivity models of materials that form the subterranean formation reveal the structure and lithology of features of the subterranean formation and may reveal the presence of oil and natural gas reservoirs.
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