期刊文献+

标量地震波频率-空间域有限差分法数值模拟 被引量:17

Seismic modeling of scalar seismic wave propagation with finitedifference scheme in frequency-space domain.
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摘要 讨论了频率-空间域优化有限差分算子地震波场模拟方法。推导了频率-空间域双程波高阶有限差分算子,计算了9点有限差分系数;提出了一种节省内存的存储策略,对稀疏矩阵和稀疏矩阵LU分解后的矩阵采用了节省内存的存储策略,使内存空间的需求量大幅度降低,可以利用本方法进行具有生产规模的地震波正演模拟;推导了依赖于频率的最佳匹配层吸收边界条件,获得了很好的吸收效果。洼陷模型和Marmousi模型数值模拟试验表明,方法可行且有效,在节约计算机资源的同时,计算精度也能得到保证。 The seismic wave field simulation method for optimizing finite difference operator in frequency-space domain is discussed.The high-order finite difference operator of two-way wave in frequency- space domain is deduced and the nine-point finite-difference coeffi- cient is calculated.Strategy for saving the inner-memory is pro- posed.The strategy greatly decreases the requirement of the inner memory for the huge sparse matrixes before and after LU decompo- sition.Seismic modeling with production scale can be performed based on this work.In addition,the perfectly matched layer ab- sorbing boundary condition depending on frequency is deduced and achieves good absorbing effect.Numerical tests on a depression model and Marmousi model demonstrate that the method is feasible and effective.The computation accuracy can guaranteed with less resource cost,
出处 《石油物探》 EI CSCD 北大核心 2009年第1期20-26,共7页 Geophysical Prospecting For Petroleum
基金 国家高技术研究发展计划(863)项目(2006AA092323) 国家重点基础研究发展计划(973)项目(2006CB202402)共同资助
关键词 频率-空间域 有限差分法 标量波方程 最佳匹配层吸收边界条件 地震波正演模拟 frequency-space domain finite difference method scalar wave equation perfectly matched layer absorbing boundary conditions seismic forward modeling
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参考文献8

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