基于频率域高阶有限差分法的正演模拟及并行算法

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Forward Modeling and Parallel Algorithm Based on High-Order Finite-Difference Method in Frequency Domain

YIN Wen^{1, 2}

1.Vocation College of Dongying City, Dongying, Shandong 257091, China;2.Geophysical Research Institute, Shengli Oilfield Company Limited SINOPEC, Dongying, Shandong 257022, China

Received:2007-02-01 Revised:1900-01-01 Online:2008-01-26 Published:2008-01-26
Contact: YIN Wen

Abstract

Abstract: For finite difference numerical simulation in elastic-wave frequencyspace domain, difference grids and boundary condition are the key for elasticwave modeling. 25-point finite-different operators were adopted to suppress grid dispersion in numerical simulation and finite-difference matrix equations were constructed. Making use of the idea of match-layer attenuation boundary condition, the numerical simulation algorithm of elastic-wave finite difference in frequency-space domain was designed. Besides, the computing loads were increased observably by using high-order finite-difference method to improve accuracy. So for elastic-wave numerical simulation of finite difference in frequency-space domain, parallel algorithm was also studied in combination with divided-conquer and pipelining technique to enhance computational efficiency, so that elastic wave propagation in elastic medium was simulated much more accurately in reasonable computation time.

Key words: forward modeling, finite-difference operators, perfectly matched layer, parallel algorithm

CLC Number:

P631.4

YIN Wen. Forward Modeling and Parallel Algorithm Based on High-Order Finite-Difference Method in Frequency Domain[J].J4, 2008, 38(1): 144-0151.

References

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