高效积分法叠前深度偏移

High efficiency integration method pre-stack depth migration

鉴于积分法叠前深度偏移算法相对于其他单程波算法具有输入输出灵活、计算效率高、陡倾角成像效果好的优点,所以目前行业内主要应用积分法叠前深度偏移算法。然而,由于近几年采集技术和计算机技术的发展使该类算法面临大数据量和高性能硬件资源的挑战,本文深刻分析了该类算法的发展瓶颈,提出了一套提高计算效率的方法和策略,如动态任务分配技术、数据压缩技术、算法优化技术和"流水线"软件优化技术,并开发为GeoEast系统下的软件产品,简称为GeoEast积分法。实际应用表明该软件可以大幅度缩短生产周期、节约用户宝贵的计算机资源和人工成本。

Compared with other one way wave algorithm,the Kirchhoff prestack depth migration method has many advantages,such as flexible input&output,high calculation efficiency,good imaging result for the steep angle and so on,as a result the Kirchhoff prestack depth migration method is still the dominant algorithm in the industry.However with the technical development in acquisition technique and computer technology the algorithm now is facing the challenges,like huge amount of seismic data,the high performance hardware and so on,the bottlenecks of the algorithm were analyzed in detail and then a sets of methods and stratifies were proposed in this paper.Those methods and stratifies include dynamic dispatching technique,data compression technique,algorithm optimization technique and stream-line software optimization technique,they were already implemented in the Geoeast System as software products,briefly called Geoeast integration method.The field application of the software show that it could greatly shorten the production cycle,save precious computer resource and labour cost for the clients.