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公开(公告)号：US11635540B2
公开(公告)日：2023-04-25
申请号：US16662644
申请日：2019-10-24
申请人： CGG SERVICES SAS
发明人： Diancheng Wang , Ping Wang
IPC分类号： G06F30/20 , G01V1/32 , G01V1/30 , G01V99/00 , G06F111/10
摘要： Methods and devices for seismic exploration of an underground structure apply W2-based full-wave inversion to transformed synthetic and seismic data. Data transformation ensures that the synthetic and seismic data are positive definite and have the same mass using an adaptive normalization. This approach yields superior results particularly when the underground structure includes salt bodies.
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公开(公告)号：US11327193B2
公开(公告)日：2022-05-10
申请号：US17378981
申请日：2021-07-19
发明人： Linong Liu , Zhengwei Li , Baokun Lu , Jiangjie Zhang , Jianfeng Zhang
摘要： The present disclosure provides a method and a device for imaging diffracted waves based on azimuth-dip angle gathers and a storage medium, which relates to the technical field of seismic exploration, comprising firstly acquiring seismic data and generating target azimuth-dip angle gathers based on the seismic data, wherein the target azimuth-dip angle gathers are a set of all azimuth-dip angle gathers in which the Fresnel zones have been muted, and each of the azimuth-dip angle gathers represents a dip-angle gather corresponding to each azimuth angle; then detecting diffracted waves based on the target azimuth-dip angle gathers, and determining the type of the diffracted waves; and finally, imaging the diffracted waves based on the type of the diffracted waves to obtain a diffracted wave imaging result.
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公开(公告)号：US11243317B2
公开(公告)日：2022-02-08
申请号：US16255593
申请日：2019-01-23
发明人： Peter M. Eick , Joel D. Brewer
摘要： Methods of analyzing and optimizing a seismic survey design are described. Specifically, the sampling quality is analyzed as opposed to the overall quality of the whole survey. This allows for analysis of the impact of the offsets, obstacles, and other aspects of the survey on the sampling quality, which will improve the ability to compress the resulting data and minimize acquisition footprints.
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公开(公告)号：US20210364666A1
公开(公告)日：2021-11-25
申请号：US17394543
申请日：2021-08-05
申请人： CGG SERVICES SAS
发明人： Gordon POOLE , Henning HOEBER , Adel KHALIL
摘要： A non-blended dataset related to a same surveyed area as a blended dataset is used to deblend the blended dataset. The non-blended dataset may be used to calculate a model dataset emulating the blended dataset, or may be transformed in a model domain and used to derive sparseness weights, model domain masking, scaling or shaping functions used to deblend the blended dataset.
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公开(公告)号：US20210333425A1
公开(公告)日：2021-10-28
申请号：US17358405
申请日：2021-06-25
发明人： Jinghuai GAO , Zhen LI , Naihao LIU
摘要： A seismic time-frequency analysis method based on generalized Chirplet transform with time-synchronized extraction, which has higher level of energy aggregation in the time direction and can better describe and characterize the local characteristics of seismic signals, and is applicable to the time-frequency characteristic representation of both harmonic signals and pulse signals, comprising the steps of processing generalized Chirplet transform with time-synchronized extraction for each seismic signal to obtain a time spectrum by: carrying out generalized Chirplet transform, calculating group delay operator and carrying out time-synchronized extraction on seismic signals, thereby the boundary and heterogeneity structure of the rock slice are more accurately and clearly shown and subsequence seismic analysis and interpretation are facilitated.
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公开(公告)号：US11143772B2
公开(公告)日：2021-10-12
申请号：US16279629
申请日：2019-02-19
申请人： PGS Geophysical AS
发明人： Endrias Asgedom , Walter Söllner
摘要： Processes and systems for deblending blended seismic data with attenuated source signatures and source ghost are described. Processes and systems compute blended upgoing pressure wavefield based on blended pressure wavefield and blended vertical velocity wavefield recorded in a marine survey of a subterranean formation. Downgoing vertical velocity wavefield is computed based on near-field pressure wavefields generated by source elements of sources activated in the marine survey. Deblended wavefield is computed based on the blended upgoing pressure wavefield and the downgoing vertical velocity source wavefield. The deblended wavefield may be used to generate an image of the subterranean formation with the source signatures and source ghosts contained in the blended pressure wavefield and blended vertical velocity wavefield.
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公开(公告)号：US11112518B2
公开(公告)日：2021-09-07
申请号：US14967679
申请日：2015-12-14
申请人： CGG SERVICES SA
发明人： Gordon Poole , Henning Hoeber , Adel Khalil
摘要： A non-blended dataset related to a same surveyed area as a blended dataset is used to deblend the blended dataset. The non-blended dataset may be used to calculate a model dataset emulating the blended dataset, or may be transformed in a model domain and used to derive sparseness weights, model domain masking, scaling or shaping functions used to deblend the blended dataset.
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公开(公告)号：US11086038B2
公开(公告)日：2021-08-10
申请号：US16165334
申请日：2018-10-19
申请人： PGS Geophysical AS
发明人： Yan-Qiang Liu , Paul Lecocq , Luca Marsiglio
摘要： Techniques are disclosed relating to reducing noise in geophysical marine survey data. Such techniques may include adapting an initial set of noise templates to recorded seismic data to generate adapted noise templates and estimating a noise component in the recorded seismic data. The estimating may include determining a degree to which noise and signal components are correlated in the recorded seismic data and masking the recorded seismic data proportionally to the degree of correlation. The adapted noise templates may then be further adapted to a difference between the estimate of the noise component and the noise templates themselves. Resultant noise templates may then be applied to denoise the recorded seismic data.
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公开(公告)号：US11079507B2
公开(公告)日：2021-08-03
申请号：US16671300
申请日：2019-11-01
发明人： Zhongmin Song , York Zheng
摘要： A virtual seismic shot record is generated based at least in part on seismic interferometry of the passive seismic data. Then, a frequency bandwidth of the virtual seismic shot record is determined, wherein the frequency bandwidth comprises a plurality of frequencies. The virtual seismic shot record is transformed into a frequency-dependent seismic shot record based on a first frequency of the plurality of frequencies. Further, a phase shift is applied to the frequency-dependent seismic shot record. A first velocity model is generated from the phase shifted frequency-dependent seismic shot record. A second velocity model may be generated using full-waveform inversion (FWI). One or more depth slices are identified from the second velocity model. A seismic image is generated based on the one or more depth slices for use with seismic exploration above a region of subsurface including a hydrocarbon reservoir and containing structural features conducive to a presence, migration, or accumulation of hydrocarbons.
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公开(公告)号：US10895655B2
公开(公告)日：2021-01-19
申请号：US15989280
申请日：2018-05-25
申请人： William Curry , Yaxun Tang
发明人： William Curry , Yaxun Tang
摘要： A computer-implemented method for generating missing frequencies within geophysical data, said method including: decomposing, with a computer, geophysical data into frequencies and slowness or wavenumber along time and one or more spatial dimensions; estimating, with a computer, a filter across known frequencies within the geophysical data for each time, spatial dimension, and slowness or wavenumber sample; extrapolating or interpolating, with a computer, the missing frequencies from the known frequencies by applying the filter; recomposing, with a computer, the known frequencies and the missing frequencies back into time and the one or more spatial dimensions; and prospecting for hydrocarbons with geophysical data that includes the missing frequencies.
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