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    • 1. 发明申请
    • METHOD AND SYSTEM FOR CHECKPOINTING DURING SIMULATIONS
    • 在模拟期间检查的方法和系统
    • WO2011146161A1
    • 2011-11-24
    • PCT/US2011/028350
    • 2011-03-14
    • EXXONMOBIL UPSTREAM RESEARCH COMPANYTAN, LijianANDERSON, John, E.
    • TAN, LijianANDERSON, John, E.
    • G06F15/173
    • G01V1/28G01V1/005G01V1/282G01V1/301G01V2210/675G01V2210/679
    • Method and system for more efficient checkpointing strategy in cross correlating (316) a forward (328) and backward (308) propagated wave such as in migrating (326) or inverting seismic data. The checkpointing strategy includes storing in memory forward simulation data at a checkpointed time step, wherein the stored data are sufficient to do a cross correlation at that time step but not to restart the forward simulation. At other checkpoints, a greater amount of data sufficient to restart the simulation may be stored in memory (314). Methods are disclosed for finding an optimal combination, i.e. one that minimizes computation time (1132), of the two types of checkpoints for a given amount of computer memory (1004), and for locating a checkpoint at an optimal time step (306, 1214, 1310). The optimal checkpointing strategy (1002) also may optimize (1408) on use of fast (1402) vs. slow (1404) storage.
    • 交叉相关(316)前向(328)和向后(308)传播的波中的更有效的检查点策略的方法和系统,例如在迁移(326)或反转地震数据中。 检查点策略包括在检查点时间步骤中存储内存中的前向仿真数据,其中所存储的数据足以在该时间步骤进行互相关,但是不重新启动正向仿真。 在其他检查点,可以将足够重新启动模拟的更大量的数据存储在存储器(314)中。 公开了用于找到最佳组合的方法,即使给定量的计算机存储器(1004)的两种类型的检查点的计算时间(1132)最小化的最佳组合,并且用于在最佳时间步长(306,1214)处定位检查点 ,1310)。 最优检查点策略(1002)还可以优化(1408)快速(1402)与慢(1404)存储的使用。
    • 7. 发明申请
    • METHOD TO ESTIMATE AND REMOVE DIRECT ARRIVALS FROM ARRAYED MARINE SOURCES
    • 估算和去除直接来自海上来源的方法
    • WO2017160424A1
    • 2017-09-21
    • PCT/US2017/016972
    • 2017-02-08
    • EXXONMOBIL UPSTREAM RESEARCH COMPANYANDERSON, John, E.NORRIS, Michael, W.WANG, HaiyangCHA, Young, Ho
    • ANDERSON, John, E.NORRIS, Michael, W.WANG, HaiyangCHA, Young, Ho
    • G01V1/28G01V1/36G01V1/38
    • G01V1/362G01V1/282G01V1/288G01V1/366G01V1/38G01V1/3808G01V2210/1212G01V2210/1293G01V2210/1423G01V2210/24G01V2210/52G01V2210/56G01V2210/59
    • A method for obtaining zero-offset and near zero offset seismic data from a marine survey, with separation of direct arrival information and reflectivity information, the method including: modeling a direct arrival estimate at a passive near-field hydrophone array by using a notional source separation on active near-field hydrophone data; generating reflection data for the passive near-field hydrophone array by subtraction of the modeled direct wave from data recorded by the passive near-field hydrophone array; generating near zero-offset reflectivity traces by stacking the reflection data for the passive near-field hydrophone array on a string-by-string basis or on a combination of strings basis; generating reflectivity information at the active near-field hydrophone array by subtracting the direct arrival estimate modeled using the notional source separation from the active near-field hydrophone data; and generating an estimate of zero-offset reflectivity traces by calculating a cross-correlation between the between the reflectivity information at the active near-field hydrophone array and the near zero-offset traces and performing an optimized stacking with summation weights based on coefficients of the cross-correlation.
    • 一种用于从海洋调查中获得零偏移和接近零偏移的地震数据的方法,其中分离直接到达信息和反射率信息,所述方法包括:在被动近距离信息模型中对直接到达估计进行建模, 通过使用主动近场水听器数据上的理论源分离来确定现场水听器阵列; 通过从无源近场水听器阵列记录的数据中减去模型化的直接波来产生无源近场水听器阵列的反射数据; 通过以逐串为基础或基于串的组合来堆叠无源近场水听器阵列的反射数据来产生接近零偏移的反射率迹线; 通过从有源近场水听器数据减去使用理论源分离建模的直接到达估计,在有源近场水听器阵列处产生反射率信息; 以及通过计算主动近场水听器阵列处的反射率信息与近零偏移迹线之间的互相关来生成零偏移反射率迹线的估计,并基于系数 互相关。
    • 9. 发明申请
    • FULL WAVEFIELD INVERSION USING TIME VARYING FILTERS
    • 使用时间变化过滤器的全波形反转
    • WO2011123197A1
    • 2011-10-06
    • PCT/US2011/025616
    • 2011-02-21
    • EXXONMOBIL UPSTREAM RESEARCH COMPANYKREBS, Jerome, R.ANDERSON, John, E.
    • KREBS, Jerome, R.ANDERSON, John, E.
    • G06F17/10
    • G01V1/282
    • An improved method for reducing the accuracy requirements on the starting model when performing multi-scale inversion of seismic data (65) by local objective function optimization (64). The different scales of inversion are brought about by incorporating a low-pass filter into the objective function (61), and then decreasing the amount of high- frequency data that is filtered out from one scale to the next. Moreover, the filter is designed to be time varying, wherein the filter's low-pass cutoff frequency decreases with increasing traveltime of the seismic data being filtered (62). The filter may be designed using Pratt' s criterion for eliminating local minima, and performing averages (or other statistical measure) of the period and the traveltime error only with respect to source and receiver location but not traveltime (63).
    • (65)通过局部目标函数优化(64)对地震数据进行多尺度反演(65)时,降低起始模型精度要求的改进方法。 通过将低通滤波器合并到目标函数(61)中,然后将从一个尺度滤出的高频数据的量减少到下一个尺度来产生不同的反演尺度。 此外,滤波器被设计为时变的,其中滤波器的低通截止频率随着被过滤的地震数据的行进时间的增加而减小(62)。 可以使用Pratt的标准来设计滤波器,以消除局部最小值,并且只针对源和接收器位置而不是行进时间执行周期的平均值(或其他统计测量)和行进时间误差(63)。