【摘要】 Kirchhoff叠前时间偏移是地震数据处理中最耗时的常用模块之一。为加快计算和显示速度,针对CU-DA平台多处理器流水线特性,对传统Kirchhoff叠前时间偏移算法在CUDA平台上进行了重新设计,包括基于CUDA的Kirchhoff叠前时间偏移算法、基于CUDA的纵波波动方程算法和GPU与CPU间的通信算法三个子算法。所有算法在NVIDIAGeForce8800 GT系统上编译实现,通过对比相同数据在Intel Core2Due CPU2.0 GHz的地震偏移,综合分析和实验结果表明,基于CUDA的Kirchhoff叠前时间偏移算法的计算速度最高可得到较传统CPU算法6倍的加速比,从而为快速处理地震偏移提供良好的支持。更多还原

【Abstract】 Kirchhoff prestack time migration is the most time-consuming part of seismic data process method.In order to accelerating seismic data computing and displaying,the paper designed prestack Kirchhoff time migration algorithm on CUDA platform considering multi-processor line features,including CUDA-based Kirchhoff prestack time migration algorithm,CUDA-based wave equation algorithm,GPU and CPU communication algorithm.Conducted extensive experiments in a PC with Intel Core2Due CPU 2.0 GHz and NVIDIA GeForce 8800 GT graphic card.Presented a comprehensive performance study to prove the efficiency of the proposed algorithms,CUDA-based Kirchhoff prestack time migration algorithm 6 times faster than available traditional CPU algorithm.The results obtained here indicate that GPU can potentially be a very useful platform for processing large-scale seismic data.更多还原