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1.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：US11092708B2
公开(公告)日：2021-08-17
申请号：US16350083
申请日：2018-09-21
Applicant: PGS Geophysical AS
Inventor： Shaoping Lu , Faqi Liu , Alejandro A. Valenciano Mavilio , Nizar Chemingui
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.
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公开(公告)号：US20190331814A1
公开(公告)日：2019-10-31
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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4.发明申请WAVEFIELD INTERPOLATION AND REGULARIZATION IN IMAGING OF MULTIPLE REFLECTION ENERGY 审中-公开波形插值和多重反射能量成像中的正则化公开(公告)号：US20170059730A1
公开(公告)日：2017-03-02
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
CPC classification number: G01V1/36 , G01V1/32 , G01V1/364 , G01V1/38 , G01V2210/1423 , G01V2210/144 , G01V2210/24 , G01V2210/44 , G01V2210/45 , G01V2210/56 , G01V2210/57
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.
Abstract translation: 描述了从原始和倍数生成地震图像的方法和系统。 可以将压力数据从压力数据和垂直速度数据中分离为上次压力数据和下行压力数据。 下行和上行压力数据的不规则间隔的接收器坐标正规化到移动网格的网格点，并且内插用于填充移动网格的网格点处的下行和上行的压力数据。 基于内插和正则化的下行压力数据和内插和正则化的上行压力数据，在移动网格的网格点处计算地震图像。 地震图像是高分辨率的，具有比其他方法产生的地震图像更低的信噪比，并且减少了采集伪影和串扰效应。
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公开(公告)号：US20160238726A1
公开(公告)日：2016-08-18
申请号：US14991416
申请日：2016-01-08
Applicant: PGS Geophysical AS
CPC classification number: G01V1/36 , G01V1/32 , G01V1/345 , G01V1/38 , G01V2210/51 , G01V2210/56
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.
Abstract translation: 地震成像的串扰衰减可以包括基于包括多次的地震数据创建地震图像。 地震图像可以包括因果串扰和反因果串扰。 可以基于地震数据预测因果串扰和反因果串扰。 预测的因果串扰和预测的反因果串扰可以从地震图像中衰减。
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Patent Agency Ranking
公开(公告)号：US10996362B2
公开(公告)日：2021-05-04
申请号：US16281812
申请日：2019-02-21
Applicant: PGS Geophysical AS
Inventor： Shaoping Lu , Faqi Liu , Nizar Chemingui
Abstract: Inversion for marine seismic imaging of a full reflected wavefield can include generating an image of a subsurface formation by full wavefield migrating a recorded seismic wavefield and generating numerically modeled data using the image. A mismatch between the numerically modeled data and the seismic wavefield can be determined. Responsive to determining that the mismatch exceeds an inversion match threshold, the image can be updated using the mismatch between the numerically modeled data and the seismic wavefield.
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公开(公告)号：US20190257967A1
公开(公告)日：2019-08-22
申请号：US16281812
申请日：2019-02-21
Applicant: PGS Geophysical AS
Inventor： Shaoping Lu , Faqi Liu , Nizar Chemingui
Abstract: Inversion for marine seismic imaging of a full reflected wavefield can include generating an image of a subsurface formation by full wavefield migrating a recorded seismic wavefield and generating numerically modeled data using the image. A mismatch between the numerically modeled data and the seismic wavefield can be determined. Responsive to determining that the mismatch exceeds an inversion match threshold, the image can be updated using the mismatch between the numerically modeled data and the seismic wavefield.
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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：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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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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