| 二维叠前深度偏移的并行算法 |
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| 引用本文： | 王真理,张得顺.二维叠前深度偏移的并行算法[J].石油地球物理勘探,1997,32(6):784-788,817. |
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| 作者姓名： | 王真理 张得顺 |
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| 作者单位： | 中国科学院地球物理研究所(王真理，杨长春，张洪宙)，胜利石油管理局物探公司(张得顺，符基昕)，胜利石油管理局计算中心(匡兵，王建立) |
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| 基金项目： | 国家自然科学基金，胜利石油管理局联合资助 |
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| 摘 要： | 鉴于ＰＶＭ软件是一中几乎能够在所有流行的计算机体系结构上运行的并行环境，本文提出了单程序多数据流（ＳＰＭＤ）方式的二维叠前深度偏称的并行算法，即走时表计算采用炮点循环并行试井成像过程采用炮工行算法。采用ＰＶＭ并行环境提供的消息传递方式进行程间通讯，在ＳＧＩＰｏｗｅｒＣｈａｌｌｅｎｅ和ＩＢＭＳ寅途中 并行机上实现了其二维叠前深度偏移的并行算法，测试结果表明：本文的二维叠前深度移并行化算法效率是比较高
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| 关 键 词： | 叠前深度偏移 并行算法 地质体 区域构造 |
Parallel algorithm for 2-D prestack depth migration |
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| Wang Zhenli,Yang Changchun, Zhang Hongzhou, Zhang Deshun, Fu Jixin, Kuang Bing,and Wang Jianli..Parallel algorithm for 2-D prestack depth migration[J].Oil Geophysical Prospecting,1997,32(6):784-788,817. |
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| Authors: | Wang Zhenli Yang Changchun Zhang Hongzhou Zhang Deshun Fu Jixin Kuang Bing and Wang Jianli |
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| Abstract: | In view of the fact that PVM software is a parallel environment which works nearly in all existing computer systems, we advance the parallel algorithm which is for 2-D prestack depth migration and behaves in the form of single program and multiple data flows (i. e. travel time table is computed by using shot-point circular parallel way, and image process by using offset parallel method). The parallel al-gorithm for 2-D prestack depth migration has been achieved in two parallel comput-ers (SGI Power Challenge and IBM SP2) by applying message transfer mode to in-terprogram communication under PVM environment. The experiments drew the following conclusion: the parallel algorithm for 2-D prestack depth migratlon has quite high efficiency; when CPU number of SGI Power Challenge computer is 4, the speed-up ratio will be 3-91,and the parallel efficiency O. 98; when the node of IBM SP2 computer is 3,the speed-up ratio will be 2.94,and the parallel efficiency 0.98. |
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| Keywords: | prestack depth migration parallel algorithm parallel virtual machine travel time efficiency speed-up ratio |
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