Title

Simplified hybrid domain FWI method and GPU acceleration

单位

(1.中国科学院地质与地球物理研究所,北京100029;2.中国科学院油气资源研究重点实验室,北京100029)

Organization

(1.Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;2.Key Laboratory of Petroleum Resources Research,Chinese Academy of Sciences,Beijing 100029,China)

摘要

全波形反演(FWI)方法综合利用叠前地震波场的动力学和运动学信息,能够高精度地重建地下介质模型参数场,但巨大的计算量一直是制约其发展的一个重要因素。GPU组成的高性能计算集群为提高全波形反演计算效率提供了重要的硬件基础。基于GPU平台,采用简化的混合域全波形反演算法实现了更快速的三维全波形反演计算。首先简单介绍了GPU加速技术应用于简化的混合域全波形反演时的一些优化技巧,包括线程调度、GPU之间数据传输以及共享内存的使用等,然后通过多GPU全波形反演测试了简化的混合域全波形反演的效果,证明了GPU加速技术能够有效地提高全波形反演的计算效率,相比CPU具有十几倍的加速比。

Abstract

Full waveform inversion comprehensively utilizes the dynamics and kinematics information of the prestack seismic wave field to rebuild accurately the parameter field of underground model.It is the important research orientation in geophysical exploration field of domestic and aboard,but the huge amount of computation has been an important factor which restricts its development.Computing capacity of high performance computing cluster currently consisting of the development of GPU provides an important basis of hardware for the improvement of the full waveform inversion (FWI) to make a more rapid 3D FWI,using the simplified hybrid domain FWI algorithm.We briefly introduce some optimization techniques of GPU acceleration applied to the simplified hybrid domain FWI,including the thread scheduling,GPU and GPU data transfer and the use of shared memory.The test shows that hybrid domain FWI can get a good inversion results.GPU technology can effectively improve the computation efficiency of the FWI and its speedup ratio is ten times more than CPU.

关键词：

GPU技术; 高性能计算; GPU技术优化; 全波形反演;

Keywords:

GPU technology,; high performance computing (HPC),; GPU technology optimization,; full waveform inversion (FWI);

基金项目

国家高技术研究发展计划(863计划)(2012AA061202)资助。

DOI

10.3969/j.issn.1000-1441.2017.01.012

简化的混合域全波形反演方法及GPU加速