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公开(公告)号：US20140358503A1
公开(公告)日：2014-12-04
申请号：US14271131
申请日：2014-05-06
申请人： Adrian Ciucivara , Dennis E. Willen
发明人： Adrian Ciucivara , Dennis E. Willen
IPC分类号： G01V3/38
CPC分类号： G01V3/38 , G01V2210/62 , G06F17/50
摘要： Method for estimating uncertainty in a physical property model generated by inverting measured geophysical data, for example a resistivity model inferred from electromagnetic field data. The method involves as few as one data inversion (32) coupled with a number of forward simulations (37). Alternative solutions (models) are generated (39) by probing a perturbation space (35) defined from a reduced model space (34), resulting from a principal component decomposition (33) of the inverted model, and selecting some of the larger components. Statistical analysis techniques may be applied (to those alternative solutions remaining after thresholding) to generate quantitative uncertainty estimates (42) applicable to the inverted model (32).
摘要翻译： 用于估计通过反演测量的地球物理数据产生的物理性能模型中的不确定性的方法，例如从电磁场数据推断的电阻率模型。 该方法涉及与多个正向模拟（37）耦合的少至一个数据反演（32）。 通过探测由缩小的模型空间（34）定义的扰动空间（35）来产生替代解决方案（模型），所述扰动空间（35）由反向模型的主成分分解（33）产生，并且选择一些较大的分量。 可以应用统计分析技术（对阈值后剩余的替代方案），以产生适用于倒置模型的定量不确定性估计（42）（32）。
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公开(公告)号：US20120080197A1
公开(公告)日：2012-04-05
申请号：US13265393
申请日：2010-03-26
摘要： Embodiments described herein use stochastic inversion (460) in lower dimensions to form an initial model (458) that is to be used in higher-dimensional gradient-based inversion (466). For example, an initial model may be formed from 1.5-D stochastic inversions, which is then processed (464) to form a 3-D model. Stochastic inversions reduce or avoid local minima and may provide an initial result that is near the global minimum.
摘要翻译： 本文所描述的实施例使用较低维度的随机反演（460）来形成将用于基于更高维梯度的反演（466）中的初始模型（458）。 例如，初始模型可以由1.5-D随机逆转形成，然后进行处理（464）以形成3-D模型。 随机反演减少或避免局部最小值，并可能提供接近全局最小值的初始结果。
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公开(公告)号：US08121789B2
公开(公告)日：2012-02-21
申请号：US12303673
申请日：2007-06-12
IPC分类号： G01V1/40
摘要： Method for identifying, determining and correcting source-related phase errors in data from a controlled source electromagnetic survey by using data from ordinary survey receivers, i.e. without benefit of source monitoring data. Abrupt anomalies indicating source malfunctions are identified (71) in the time domain by plotting time intervals between neighboring zero crossings or by zero-lag cross correlation between consecutive bins of receiver data, and the amount of the time error (73) can be determined by performing cross correlation between two bins on either side of an anomaly. In the frequency domain, transmitter anomalies can be identified by looking for discontinuities in plots of phase vs. offset, and the corrective phase shift can be determined by matching the phase on one side of the anomaly to that on the other side. A global time/phase shift (76) can be determined by using phase frequency-scaling behavior at near offsets.
摘要翻译： 用于通过使用普通测量接收机的数据来识别，确定和校正来自受控源电磁勘测的源相关相位误差的方法，即不受源监测数据的益处。 在时域中通过绘制相邻过零点之间的时间间隔或接收器数据的连续箱之间的零时相互相关来识别（71）在时域中的突发异常，并且时间误差量（73）可以由 在异常的任一侧执行两个箱之间的互相关。 在频域中，可以通过查找相位偏移图中的不连续性来识别发射机异常，并且可以通过将异常一侧的相位与另一侧的相位匹配来确定校正相移。 全局时间/相移（76）可以通过使用接近偏移的相位频率缩放行为来确定。
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公开(公告)号：US08090539B2
公开(公告)日：2012-01-03
申请号：US12087371
申请日：2006-11-15
申请人： Dennis E. Willen
发明人： Dennis E. Willen
摘要： The method for suppressing noise in the controlled seismic source electromagnetic survey data based on the frequency content of the noise (51) contained in the data. The invention recognizes that some data variations across bins cannot be attributed to resistivity variations within the earth. This variation across the bins constitutes a model of noise in such surveys, and the invention mitigates noise that obeys this model.
摘要翻译： 基于数据中包含的噪声（51）的频率含量，抑制受控地震源电磁勘测数据中的噪声的方法。 本发明认识到，一些数据变化不能归因于地球内的电阻率变化。 在这种调查中，整个箱体上的这种变化构成噪声模型，并且本发明减轻了遵守该模型的噪声。
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45.发明授权公开(公告)号：US08008920B2
公开(公告)日：2011-08-30
申请号：US11992607
申请日：2006-08-28
申请人： Xinyou Lu , Scott C. Hornbostel , Dennis E. Willen
发明人： Xinyou Lu , Scott C. Hornbostel , Dennis E. Willen
摘要： A method and apparatus of constructing a signal for a controlled source electromagnetic survey is described. In one embodiment, a method is described that includes determining a first waveform and a second waveform, the first waveform and second waveform related to a combined frequency spectrum and bandwidth associated with a geophysical survey line. Then, a signal is constructed by sequencing the first waveform with the second waveform. This signal may be utilized in a transmitter, which may be pulled by a vessel along the geophysical survey line.
摘要翻译： 描述了构成受控源电磁勘测信号的方法和装置。 在一个实施例中，描述了一种方法，其包括确定与地球物理测量线相关联的组合频谱和带宽相关的第一波形和第二波形，第一波形和第二波形。 然后，通过用第二波形对第一波形进行排序来构建信号。 该信号可以用在发射机中，其可以沿着地球物理勘测线由船只拉动。
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46.发明申请Estimating Noise at One Frequency by Sampling Noise at Other Frequencies 有权通过对其他频率的噪声进行采样来估计一个频率的噪声公开(公告)号：US20090276189A1
公开(公告)日：2009-11-05
申请号：US12501251
申请日：2009-07-10
申请人： Dennis E. Willen , Xinyou Lu
发明人： Dennis E. Willen , Xinyou Lu
IPC分类号： H04B15/00
摘要： A method, apparatus and computer program for improving the signal-to-noise ratio of a signal S(t), S(t) containing Signal and noise, are disclosed. A measurement of S(t) at a frequency-of-interest is obtained. Noise measurements of S(t) at one or more noise frequencies where the Signal portion of S(t) is expected to be small are obtained. The noise at the frequency-of-interest is estimated using the noise measurements at the one or more noise frequencies. The estimated noise is subtracted from the measurement of S(t) at the frequency-of-interest.
摘要翻译： 公开了一种用于提高包含信号和噪声的信号S（t），S（t）的信噪比的方法，装置和计算机程序。 获得感兴趣频率的S（t）的测量值。 获得预期S（t）的信号部分的一个或多个噪声频率处的S（t）的噪声测量值。 使用在一个或多个噪声频率处的噪声测量来估计感兴趣频率处的噪声。 从感兴趣频率的S（t）的测量中减去估计的噪声。
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47.发明授权公开(公告)号：US07593815B2
公开(公告)日：2009-09-22
申请号：US11793121
申请日：2006-01-17
申请人： Dennis E. Willen , Xinyou Lu
发明人： Dennis E. Willen , Xinyou Lu
IPC分类号： G01F19/00
摘要： A method, apparatus and computer program for improving the signal-to-noise ratio of a signal S(t), S(t) containing Signal and noise, are disclosed. A measurement of S(t) at a frequency-of-interest is obtained. Noise measurements of S(t) at one or more noise frequencies where the Signal portion of S(t) is expected to be small are obtained. The noise at the frequency-of-interest is estimated using the noise measurements at the one or more noise frequencies. The estimated noise is subtracted from the measurement of S(t) at the frequency-of-interest.
摘要翻译： 公开了一种用于提高包含信号和噪声的信号S（t），S（t）的信噪比的方法，装置和计算机程序。 获得感兴趣频率的S（t）的测量值。 获得预期S（t）的信号部分的一个或多个噪声频率处的S（t）的噪声测量值。 使用在一个或多个噪声频率处的噪声测量来估计感兴趣频率处的噪声。 从感兴趣频率的S（t）的测量中减去估计的噪声。
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公开(公告)号：US20090067546A1
公开(公告)日：2009-03-12
申请号：US12087438
申请日：2006-12-04
申请人： Dennis E. Willen
发明人： Dennis E. Willen
IPC分类号： H04L27/00
摘要： Method for compensating for phase errors in electromagnetic data by exploiting the frequency scaling properties of electromagnetic fields. The data are obtained at various source-receiver offsets. Then, temporal frequency components of the data at each offset R are determined. Next, the phase spectrum (phase vs. offset) for each of the frequency components is determined. Then, the phase spectra for the different frequencies f are displayed vs. scaled offset R√ω, where ω=2πf. Finally, the phase spectra are then adjusted such that the differences in phases for the different frequencies are reduced. The adjustment process can be repeated until phase differences are reduced to an acceptable level.
摘要翻译： 通过利用电磁场的频率缩放特性补偿电磁数据中的相位误差的方法。 在各种源 - 接收器偏移下获得数据。 然后，确定每个偏移R处的数据的时间频率分量。 接下来，确定每个频率分量的相位谱（相位 - 偏移）。 然后，显示不同频率f的相位谱与比例偏移R√omega，其中ω= 2pif。 最后，调整相位谱，使得不同频率的相位差减小。 可以重复调整过程，直到相位差降低到可接受的水平。
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公开(公告)号：US20090005997A1
公开(公告)日：2009-01-01
申请号：US12087371
申请日：2006-11-15
申请人： Dennis E. Willen
发明人： Dennis E. Willen
摘要： The method for suppressing noise in the controlled seismic source electromagnetic survey data based on the frequency content of the noise (51) contained in the data. The invention recognizes that some data variations across bins cannot be attributed to resistivity variations within the earth. This variation across the bins constitutes a model of noise in such surveys, and the invention mitigates noise that obeys this model.
摘要翻译： 基于数据中包含的噪声（51）的频率含量，抑制受控地震源电磁勘测数据中的噪声的方法。 本发明认识到，一些数据变化不能归因于地球内的电阻率变化。 在这种调查中，整个箱体上的这种变化构成噪声模型，并且本发明减轻了遵守该模型的噪声。
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50.发明授权Method for frequency domain seismic data processing on a massively parallel computer 失效一种大规模并行计算机频域地震数据处理方法
公开(公告)号：US5995904A
公开(公告)日：1999-11-30
申请号：US793779
申请日：1997-12-12
申请人： Dennis E. Willen , Louis J. Maher
发明人： Dennis E. Willen , Louis J. Maher
CPC分类号： G06F17/10
摘要： A frequency domain method of processing geophysical data on a computer having massively parallel processors. The method involves assigning data slice partitions to each processor, precomputing a velocity model corresponding to the geophysical data, and migrating the data on each slice within each processor using a one-pass, split wave equation finite difference technique for depth migration and either phase shift or recursive techniques for time migration. A sequence of transforms and transpositions between processors assigned partitions on each frequency slice transforms into the frequency-wavenumber domain and allows the migration calculations to be directly performed by each processor to be independent of each other processor. The transforms and transposes also allow for depth migration error correction and filtering in the frequency-wavenumber domain.
摘要翻译： PCT No.PCT / US96 / 10276 Sec。 371日期1997年12月12日 102（e）日期1997年12月12日PCT提交1996年6月13日PCT公布。 WO97 / 00485 PCT出版物 日期1997年1月3日在具有大规模并行处理器的计算机上处理地球物理数据的频域方法。 该方法包括将数据切片分区分配给每个处理器，预先计算对应于地球物理数据的速度模型，以及使用用于深度偏移和相移的单程，分裂波方程有限差分技术在每个处理器内的每个切片上迁移数据 或递归技术进行时间迁移。 在每个频率片上分配分区的处理器之间的变换和转置序列转换成频率波数域，并允许每个处理器直接执行迁移计算以独立于彼此的处理器。 变换和转置也允许在频率波数域中进行深度偏移纠错和滤波。
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