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    • 3. 发明授权
    • Hybrid method for full waveform inversion using simultaneous and sequential source method
    • 使用同步和顺序源方法进行全波形反演的混合方法
    • US08437998B2
    • 2013-05-07
    • US12903744
    • 2010-10-13
    • Partha S. RouthJerome R. KrebsCarey MarcinkovichSpyridon LazaratosSunwoong Lee
    • Partha S. RouthJerome R. KrebsCarey MarcinkovichSpyridon LazaratosSunwoong Lee
    • G06G7/48
    • G01V1/28G01V1/005G01V2210/67
    • Method for simultaneous full-wavefield inversion of gathers of source (or receiver) encoded geophysical data to determine a physical properties model for a subsurface region, especially suitable for surveys where fixed receiver geometry conditions were not satisfied in the data acquisition. First, a shallow time window of the data (202) where the fixed receiver condition is satisfied is inverted by simultaneous encoded (203) source inversion (205). Then, the deeper time window of the data (208) is inverted by sparse sequential source inversion (209), using the physical properties model from the shallow time window (206) as a starting model (207). Alternatively, the shallow time window model is used to simulate missing far offset data (211) producing a data set satisfying the stationary receiver assumption, after which this data set is source encoded (212) and inverted by simultaneous source inversion (214).
    • 源(或接收机)编码地球物理数据的同时全波场反演方法,以确定地下区域的物理性质模型,特别适用于在数据采集中不满足固定接收机几何条件的调查。 首先,通过同时编码(203)源反转(205)来反转其中满足固定接收机条件的数据(202)的浅时间窗口。 然后,使用来自浅时间窗口(206)的物理属性模型作为起始模型(207),通过稀疏顺序源反转(209)将数据(208)的更深的时间窗口反转。 或者,浅时间窗模型用于模拟产生满足固定接收机假设的数据集的丢失远偏移数据(211),之后该数据集被源编码(212)并且由同时源反转(214)反转。
    • 7. 发明申请
    • MULTI-PARAMETER INVERSION THROUGH OFFSET DEPENDENT ELASTIC FWI
    • 通过偏移依赖弹性FWI的多参数反转
    • US20140350861A1
    • 2014-11-27
    • US14272020
    • 2014-05-07
    • Ke WangSpyridon Lazaratos
    • Ke WangSpyridon Lazaratos
    • G01V1/28
    • G01V1/28G01V1/303G01V1/306G01V2210/622G01V2210/673
    • Method for multi-parameter inversion using elastic inversion. This method decomposes data into offset/angle groups and performs inversion on them in sequential order. This method can significantly speed up convergence of the iterative inversion process, and is therefore most advantageous when used for full waveform inversion (FWI). The present inventive approach draws upon relationships between reflection energy and reflection angle, or equivalently, offset dependence in elastic FWI. The invention uses recognition that the amplitudes of small angle (near offset) reflections are largely determined by acoustic impedance alone (1), independent for the most part of Vp/Vs. Large angle (middle and far offset) reflections are affected by Ip, Vp/Vs (2) and other earth parameters such as density (3) and anisotropy. Therefore, the present inventive method decomposes data into angle or offset groups in performing multi-parameter FWI to reduce crosstalk between the different model parameters being determined in the inversion.
    • 使用弹性反演的多参数反演方法。 该方法将数据分解为偏移/角度组,并按顺序执行反演。 这种方法可以显着加快迭代反演过程的收敛,因此当用于全波形反演(FWI)时最有利。 本发明的方法利用反射能量和反射角度之间的关系,或等效地,弹性FWI中的偏移依赖性。 本发明使用识别,小角度(近偏移)反射的幅度主要由声阻抗单独确定(1),对于大部分Vp / Vs而言是独立的。 大角度(中,远偏移)反射受Ip,Vp / Vs(2)和其他地球参数如密度(3)和各向异性的影响。 因此,本发明的方法在执行多参数FWI时将数据分解为角度或偏移组,以减少在反演中确定的不同模型参数之间的串扰。