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公开(公告)号：US20190250293A1
公开(公告)日：2019-08-15
申请号：US16394444
申请日：2019-04-25
申请人： PGS Geophysical AS
CPC分类号： G01V1/30 , G01V1/325 , G01V1/364 , G01V1/38 , G01V2210/121 , G01V2210/1423 , G01V2210/46 , G01V2210/48 , G01V2210/56 , G01V2210/675
摘要： Prediction and subtraction of multiple diffractions may include transforming previously acquired seismic data from a time-space domain to a transformed domain using a dictionary of compressive basis functions and separating, within the transformed previously acquired seismic data, a first portion and a second portion of the transformed previously acquired seismic data. Prediction and subtraction of multiple diffractions may also include predicting a plurality of multiple diffractions based on the separated first and second portions and adaptively subtracting the predicted multiple diffractions from the previously acquired seismic data. Prediction and subtraction of multiple diffractions may also include inverse transforming a particular seismic data set from the transformed domain to the time-space domain.
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公开(公告)号：US20180017693A1
公开(公告)日：2018-01-18
申请号：US15536554
申请日：2015-12-18
申请人： PGS Geophysical AS
CPC分类号： G01V1/364 , G01V1/36 , G01V1/38 , G01V2210/32 , G01V2210/324 , G01V2210/44
摘要： A seismic noise mitigation method. The method comprises identifying a wavenumber of a component in a residual wavenumber spectrum having a largest norm based on a preconditioned residual wavenumber spectrum. A contribution to the residual wavenumber spectrum from the identified wavenumber component, is subtracted therefrom. A next residual wavenumber spectrum is based thereon and a relative residual computed based on that. The identifying, subtracting and calculating are repeated until a first to occur termination condition selected from the group consisting of: a current relative residual is less than a threshold residual; a difference between the current relative residual and a smallest relative residual exceeds product of the smallest relative residual and a preselected threshold factor; and a difference between a current number of iterations and a number of iterations corresponding to a currently encountered smallest relative residual encountered exceeds a preselected threshold number of iterations.
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公开(公告)号：US10310115B2
公开(公告)日：2019-06-04
申请号：US15191887
申请日：2016-06-24
申请人： PGS Geophysical AS
摘要： Prediction and subtraction of multiple diffractions may include transforming previously acquired seismic data from a time-space domain to a transformed domain using a dictionary of compressive basis functions and separating, within the transformed previously acquired seismic data, a first portion and a second portion of the transformed previously acquired seismic data. Prediction and subtraction of multiple diffractions may also include predicting a plurality of multiple diffractions based on the separated first and second portions and adaptively subtracting the predicted multiple diffractions from the previously acquired seismic data. Prediction and subtraction of multiple diffractions may also include inverse transforming a particular seismic data set from the transformed domain to the time-space domain.
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公开(公告)号：US10261207B2
公开(公告)日：2019-04-16
申请号：US15536554
申请日：2015-12-18
申请人： PGS Geophysical AS
摘要： A seismic noise mitigation method. The method comprises identifying a wavenumber of a component in a residual wavenumber spectrum having a largest norm based on a preconditioned residual wavenumber spectrum. A contribution to the residual wavenumber spectrum from the identified wavenumber component, is subtracted therefrom. A next residual wavenumber spectrum is based thereon and a relative residual computed based on that. The identifying, subtracting and calculating are repeated until a first to occur termination condition selected from the group consisting of: a current relative residual is less than a threshold residual; a difference between the current relative residual and a smallest relative residual exceeds product of the smallest relative residual and a preselected threshold factor; and a difference between a current number of iterations and a number of iterations corresponding to a currently encountered smallest relative residual encountered exceeds a preselected threshold number of iterations.
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公开(公告)号：US20180210104A1
公开(公告)日：2018-07-26
申请号：US15320339
申请日：2015-06-24
申请人： PGS Geophysical AS
发明人： Paolo Terenghi
摘要： Wavefield reconstruction may include reconstructing a wavefield at a location away from a seismic receiver based on seismic data sampled from the seismic receiver, a vector of model coefficients comprising a scattering potential, and at least one of a mapping matrix comprising a dictionary of Green's functions and an operator defined by a combination of a number of functions.
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公开(公告)号：US10571587B2
公开(公告)日：2020-02-25
申请号：US15320339
申请日：2015-06-24
申请人： PGS Geophysical AS
发明人： Paolo Terenghi
摘要： Wavefield reconstruction may include reconstructing a wavefield at a location away from a seismic receiver based on seismic data sampled from the seismic receiver, a vector of model coefficients comprising a scattering potential, and at least one of a mapping matrix comprising a dictionary of Green's functions and an operator defined by a combination of a number of functions.
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公开(公告)号：US20170023686A1
公开(公告)日：2017-01-26
申请号：US15191887
申请日：2016-06-24
申请人： PGS Geophysical AS
CPC分类号： G01V1/30 , G01V1/325 , G01V1/364 , G01V1/38 , G01V2210/121 , G01V2210/1423 , G01V2210/46 , G01V2210/48 , G01V2210/56 , G01V2210/675
摘要： Prediction and subtraction of multiple diffractions may include transforming previously acquired seismic data from a time-space domain to a transformed domain using a dictionary of compressive basis functions and separating, within the transformed previously acquired seismic data, a first portion and a second portion of the transformed previously acquired seismic data. Prediction and subtraction of multiple diffractions may also include predicting a plurality of multiple diffractions based on the separated first and second portions and adaptively subtracting the predicted multiple diffractions from the previously acquired seismic data. Prediction and subtraction of multiple diffractions may also include inverse transforming a particular seismic data set from the transformed domain to the time-space domain.
摘要翻译： 多个衍射的预测和减法可以包括使用压缩基函数的词典将先前获取的地震数据从时空域转换为变换域，并且在经变换的先前获取的地震数据中分离出第一部分和第二部分 改变以前获得的地震数据。 多个衍射的预测和减法还可以包括基于分离的第一和第二部分来预测多个多重衍射，并且从先前获取的地震数据中自适应地减去预测的多个衍射。 多个衍射的预测和减法还可以包括将特定的地震数据集从变换的域逆变换为时空域。
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