波动方程叠前深度偏移PC集群并行计算技术
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摘要
波动方程三维叠前深度偏移研究,是近年来国内外油气科研服务公司的研究焦点,运用PC集群式并行机结构的软硬件特点,进行波动方程叠前深度偏移,成为加速其庞大计算量的有效工具。本文基于地震波场成像基本算法的内在并行性,结合PC集群并行机的软硬件特点,提出2种算法处理流程对策,获得以较低的资金投入,而成功地实现了工业化生产规模的应用效果。并给出大庆油田兴城北地区60km~2三维地震资料处理的算例。结果表明,算法流程实用性能良好,具有较高的加速比,良好的扩展性及适应性。
Oil and scientific companies have been focusing on the study of 3-D pre-stack depth migration of wave equation. The im-provement and cornbination on the software and hardware of PC cluster have been increasing helpful tool of handling over the huge computation of wave equation pre-stack depth migration. In this paper the industrialized computation has been successfully put into reality at a rather low price in virtue of the inherent parallel charac-teristic of the wave equation pre-stack depth migration arithmetie and high performance of the PC cluster system, which leads to two kinds of parallel flows. A 3-D seismic data processing example of this approach of Xingchengbwi area with the area of 60 km is pro- posed, and the result shows satisfied application ability of the flow, speeding-up ratio and high expansibility and flexibility.
Oil and scientific companies have been focusing on the study of 3-D pre-stack depth migration of wave equation. The im-provement and cornbination on the software and hardware of PC cluster have been increasing helpful tool of handling over the huge computation of wave equation pre-stack depth migration. In this paper the industrialized computation has been successfully put into reality at a rather low price in virtue of the inherent parallel charac-teristic of the wave equation pre-stack depth migration arithmetie and high performance of the PC cluster system, which leads to two kinds of parallel flows. A 3-D seismic data processing example of this approach of Xingchengbwi area with the area of 60 km is pro- posed, and the result shows satisfied application ability of the flow, speeding-up ratio and high expansibility and flexibility.
引文
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[7] 陈志德.高精度克希霍夫三维叠前深度偏移及并行实现[J].大庆石油地质与开发,2001,(3) :64-66．
[8] 陈国良.并行算法的设计与分析[M].北京:中国科学技术出版社,1993．
[2] Claerbout J F. Imaging the earth's interior[M].Blackwell Scientific Publ, 1985．
[3] Claerbout J F. Multidimensional recursive filters via a helix with appli-cation to velocity estimation and 3-D migration, 1998, 68th Annual In-temet[M]. Mtg, Geophysics. Expanded Abstracts, 1995-1998．
[4] Dietrich Ristow, Thomas Ruhl. Fourier finite-difference migration[M]. Geophysics, 59． 1882-1893．
[5] Feng K. On difference schemes and symplectic geometry[A]. In Feng K. ed, Proc 1984, Beijing, Symp Diff Geometry and Dif-fEquations[C]. Beijing: Science Press, 1985． 42-58．
[6] 陈树民,刘洪,李幼铭.三维叠前深度偏移的准三维算法[J].地球物理学进展,2001(16) :23-28．
[7] 陈志德.高精度克希霍夫三维叠前深度偏移及并行实现[J].大庆石油地质与开发,2001,(3) :64-66．
[8] 陈国良.并行算法的设计与分析[M].北京:中国科学技术出版社,1993．
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