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公开(公告)号：US20100286921A1
公开(公告)日：2010-11-11
申请号：US12811461
申请日：2009-01-26
申请人： Sunwoong Lee , Warren Ross
发明人： Sunwoong Lee , Warren Ross
CPC分类号： G01V1/28 , G01V2210/20
摘要： Embodiments are directed to systems and methods (200, 300) that enable spatial variability of surface waves to be accounted for in dispersion correction in seismic data processing. This yields superior surface wave noise mitigation, with reduced likelihood of attenuating signal. Embodiments are operative with spatially inhomogeneous media.
摘要翻译： 实施例涉及能够在地震数据处理中的色散校正中考虑表面波的空间变异性的系统和方法（200,300）。 这产生了优异的表面波噪声减轻，降低了信号衰减的可能性。 实施例与空间不均匀的介质一起使用。
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2.发明授权Methods for approximating hessian times vector operation in full wavefield inversion 有权在全波场反演中近似粗糙时间向量运算的方法公开(公告)号：US09176930B2
公开(公告)日：2015-11-03
申请号：US13655171
申请日：2012-10-18
申请人： Sunwoong Lee , Anatoly Baumstein
发明人： Sunwoong Lee , Anatoly Baumstein
CPC分类号： G06F17/16 , G01V1/28 , G01V1/282 , G01V2210/614 , G01V2210/67 , G01V2210/679
摘要： Method for estimating the Hessian of the objective function, times a vector, in order to compute an update in an iterative optimization solution to a partial differential equation such as the wave equation, used for example in full wave field inversion of seismic data. The Hessian times vector operation is approximated as one forward wave propagation (24) and one gradient computation (25) in a modified subsurface model (23). The modified subsurface model may be a linear combination of the current subsurface model (20) and the vector (21) to be multiplied by the Hessian matrix. The forward-modeled data from the modified model are treated as a field measurement in the data residual of the objective function for the gradient computation in the modified model. In model parameter estimation by iterative inversion of geophysical data, the vector in the first iteration may be the gradient of the objective function.
摘要翻译： 用于估计目标函数的Hessian乘以向量的方法，以便计算迭代优化方案中的一个偏微分方程的更新，例如用于例如在地震数据的全波场反演中的波动方程。 在修改后的地下模型（23）中，Hessian时间向量运算近似为一个正向波传播（24）和一个梯度计算（25）。 修改的地下模型可以是当前地下模型（20）和矢量（21）的线性组合，以乘以Hessian矩阵。 修正模型的前向建模数据被视为修正模型中梯度计算的目标函数的数据残差中的场测量。 在通过地球物理数据迭代反演的模型参数估计中，第一次迭代中的向量可能是目标函数的梯度。
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3.发明申请Accelerating Full Wavefield Inversion with Nonstationary Point-Spread Functions 审中-公开用非稳态点扩散函数加速全波场反演公开(公告)号：US20150073755A1
公开(公告)日：2015-03-12
申请号：US14330767
申请日：2014-07-14
申请人： Yaxun Tang , Sunwoong Lee
发明人： Yaxun Tang , Sunwoong Lee
CPC分类号： G01V1/28 , G01V2210/66 , G06F17/5009 , G06F2217/16
摘要： Method for reducing computational time in inversion of geophysical data to infer a physical property model (91), especially advantageous in full wavefield inversion of seismic data. An approximate Hessian is pre-calculated by computing the product of the exact Hessian and a sampling vector composed of isolated point diffractors (82), and the approximate Hessian is stored in computer hard disk or memory (83). The approximate Hessian is then retrieved when needed (99) for computing its product with the gradient (93) of an objective function or other vector. Since the approximate Hessian is very sparse (diagonally dominant), its product with a vector may therefore be approximated very efficiently with good accuracy. Once the approximate Hessian is computed and stored, computing its product with a vector requires no simulator calls (wavefield propagations) at all. The pre-calculated approximate Hessian can also be reused in the subsequent steps whenever necessary.
摘要翻译： 减少地球物理数据反演中的计算时间推断物理性质模型的方法（91），在地震数据的全波场反演中特别有利。 通过计算确切的Hessian和由孤立点衍射器（82）组成的采样矢量的乘积，预先计算近似的Hessian，并将近似Hessian存储在计算机硬盘或存储器（83）中。 然后，当需要（99）用于使用目标函数或其他向量的梯度（93）计算其乘积时，检索近似的Hessian。 由于近似的Hessian是非常稀疏的（对角占优势的），因此可以非常有效地逼近具有向量的乘积。 一旦计算和存储近似的Hessian，用矢量计算其乘积就不需要模拟器调用（波场传播）。 预先计算的近似黑森西也可以在随后的步骤中重复使用。
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4.发明授权公开(公告)号：US08483009B2
公开(公告)日：2013-07-09
申请号：US12811464
申请日：2009-01-26
申请人： Sunwoong Lee , Warren S. Ross
发明人： Sunwoong Lee , Warren S. Ross
IPC分类号： G01V1/36
CPC分类号： G01V1/28 , G01V2210/20
摘要： Embodiments use seismic processing methods that account for the spatial variability of surface wave velocities. Embodiments analyze surface wave properties by rapidly characterizing spatial variability of the surface waves in the seismic survey data (302). Filtering criteria are formed using the spatial variability of the surface waves (204). The filtering criteria can then be used to remove at least a portion of the surface waves from the seismic data (206, 319). The rapid characterization involves estimating a local group velocity of the surface waves by cross-correlation of the analytic signals (302).
摘要翻译： 实施例使用地震处理方法来考虑表面波速度的空间变异性。 实施例通过快速表征地震波数据中的表面波的空间变异性来分析表面波特性（302）。 使用表面波（204）的空间变异性形成滤波标准。 然后可以使用过滤标准从地震数据（206,319）中去除至少一部分表面波。 快速表征涉及通过分析信号（302）的互相关来估计表面波的局部群速度。
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5.发明授权Simultaneous source encoding and source separation as a practical solution for full wavefield inversion 有权同源源编码和源分离作为全波场反演的实际解决方案公开(公告)号：US08775143B2
公开(公告)日：2014-07-08
申请号：US13229252
申请日：2011-09-09
申请人： Partha S. Routh , Sunwoong Lee , Ramesh Neelamani , Jerome R. Krebs , Spyridon Lazaratos , Carey Marcinkovich
发明人： Partha S. Routh , Sunwoong Lee , Ramesh Neelamani , Jerome R. Krebs , Spyridon Lazaratos , Carey Marcinkovich
IPC分类号： G06G7/48
CPC分类号： G01V1/28 , G01V2210/67
摘要： Method for simultaneous full-wavefield inversion of gathers of source (or receiver) encoded geophysical data to determine a physical properties model (118) for a subsurface region, especially suitable for surveys where fixed receiver geometry conditions were not satisfied in the data acquisition. Simultaneous source separation (104) is performed to lessen any effect of the measured geophysical data's not satisfying the fixed-receiver assumption. A data processing step (106) coming after the simultaneous source separation acts to conform model-simulated data (105) to the measured geophysical data (108) for source and receiver combinations that are missing in the measured geophysical data.
摘要翻译： 用于同源全波场反演源（或接收机）编码的地球物理数据的方法，以确定地下区域的物理性质模型（118），特别适合于在数据采集中不满足固定接收机几何条件的调查。 执行同源分离（104）以减少测量的地球物理数据不满足固定接收机假设的任何影响。 在同时源分离之后进行的数据处理步骤（106）用于将模拟模拟数据（105）符合测量的地球物理数据（108），用于测量的地球物理数据中缺少的源和接收机组合。
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公开(公告)号：US20140180656A1
公开(公告)日：2014-06-26
申请号：US14192497
申请日：2014-02-27
申请人： Jerome R. Krebs , Sunwoong Lee , Young Ho Cha
发明人： Jerome R. Krebs , Sunwoong Lee , Young Ho Cha
IPC分类号： G06F17/50
CPC分类号： G06F17/5009 , G01V1/00 , G01V11/00 , G01V99/005 , G06T11/006
摘要： Method for reducing artifacts in a subsurface physical properties model (120) inferred by iterative inversion (140) of geophysical data (130), wherein the artifacts are associated with some approximation (110) made during the iterative inversion. In the method, some aspect of the approximation is changed (160) as the inversion is iterated such that the artifacts do not increase by coherent addition.
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7.发明申请Hybride Method For Full Waveform Inversion Using Simultaneous and Sequential Source Method 有权使用同时和顺序源方法进行全波形反演的Hybride方法公开(公告)号：US20120073824A1
公开(公告)日：2012-03-29
申请号：US12903744
申请日：2010-10-13
CPC分类号： G01V1/28 , G01V1/005 , G01V2210/67
摘要： 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).
摘要翻译： 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。
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8.发明申请Methods For Subsurface Parameter Estimation In Full Wavefield Inversion And Reverse-Time Migration 有权全波场反演和反向时间迁移的地下参数估计方法公开(公告)号：US20110194379A1
公开(公告)日：2011-08-11
申请号：US12984412
申请日：2011-01-04
IPC分类号： G01V1/28
CPC分类号： G01V1/00 , G01V1/28 , G01V1/282 , G01V1/301 , G01V1/306 , G01V1/368 , G01V2210/51 , G01V2210/614 , G01V2210/622 , G01V2210/663 , G01V2210/675 , G01V2210/679
摘要： Method for converting seismic data to obtain a subsurface model of, for example, bulk modulus or density. The gradient of an objective function is computed (103) using the seismic data (101) and a background subsurface medium model (102). The source and receiver illuminations are computed in the background model (104). The seismic resolution volume is computed using the velocities of the background model (105). The gradient is converted into the difference subsurface model parameters (106) using the source and receiver illumination, seismic resolution volume, and the background subsurface model. These same factors may be used to compensate seismic data migrated by reverse time migration, which can then be related to a subsurface bulk modulus model. For iterative inversion, the difference subsurface model parameters (106) are used as preconditioned gradients (107).
摘要翻译： 用于转换地震数据以获得例如体积模量或密度的地下模型的方法。 使用地震数据（101）和背景地下介质模型（102）计算目标函数的梯度（103）。 源和接收器照明在背景模型（104）中计算。 使用背景模型（105）的速度计算地震解析度。 使用源和接收器照明，地震分辨率体积和背景地下模型将梯度转换为差分地下模型参数（106）。 这些相同的因素可以用于补偿通过反向时间迁移迁移的地震数据，其然后可以与地下体积模量模型相关。 对于迭代反演，差分地下模型参数（106）用作预处理梯度（107）。
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9.发明申请公开(公告)号：US20100286919A1
公开(公告)日：2010-11-11
申请号：US12811464
申请日：2009-01-26
申请人： Sunwoong Lee , Warren S. Ross
发明人： Sunwoong Lee , Warren S. Ross
CPC分类号： G01V1/28 , G01V2210/20
摘要： Embodiments use seismic processing methods that account for the spatial variability of surface wave velocities. Embodiments analyze surface wave properties by rapidly characterizing spatial variability of the surface waves in the seismic survey data (302). Filtering criteria are formed using the spatial variability of the surface waves (204). The filtering criteria can then be used to remove at least a portion of the surface waves from the seismic data (206, 319). The rapid characterization involves estimating a local group velocity of the surface waves by cross-correlation of the analytic signals (302).
摘要翻译： 实施例使用地震处理方法来考虑表面波速度的空间变异性。 实施例通过快速表征地震波数据中的表面波的空间变异性来分析表面波特性（302）。 使用表面波（204）的空间变异性形成滤波标准。 然后可以使用过滤标准从地震数据（206,319）中去除至少一部分表面波。 快速表征涉及通过分析信号（302）的互相关来估计表面波的局部群速度。
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公开(公告)号：US10036818B2
公开(公告)日：2018-07-31
申请号：US14330767
申请日：2014-07-14
申请人： Yaxun Tang , Sunwoong Lee
发明人： Yaxun Tang , Sunwoong Lee
CPC分类号： G01V1/28 , G01V2210/66 , G06F17/5009 , G06F2217/16
摘要： Method for reducing computational time in inversion of geophysical data to infer a physical property model (91), especially advantageous in full wavefield inversion of seismic data. An approximate Hessian is pre-calculated by computing the product of the exact Hessian and a sampling vector composed of isolated point diffractors (82), and the approximate Hessian is stored in computer hard disk or memory (83). The approximate Hessian is then retrieved when needed (99) for computing its product with the gradient (93) of an objective function or other vector. Since the approximate Hessian is very sparse (diagonally dominant), its product with a vector may therefore be approximated very efficiently with good accuracy. Once the approximate Hessian is computed and stored, computing its product with a vector requires no simulator calls (wavefield propagations) at all. The pre-calculated approximate Hessian can also be reused in the subsequent steps whenever necessary.
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