摘要
随着地震数据规模不断增大,进行波动方程逆时偏移计算时,采用的重复正传计算与波场数据硬盘缓存的波场数据存储策略是制约逆时偏移计算效率的一个主要因素。为此提出了利用混合内存技术构建高达1.5 TB的超大内存计算节点,以满足大数据量波场数据无损压缩后内存存储需求,实现最小计算量的全波场数据内存存储策略,解决大数据量波场数据存储问题,提升偏移计算效率。实际生产数据测试结果表明,对于大规模数据,节点配置超大内存可使高密度炮数据偏移计算效率提升46.1%以上,计算效率提升显著,可缩短大规模地震数据逆时偏移计算时间,降低计算能源消耗。该技术还可应用于其它大内存需求的地震数据处理,因此具有很好的实用性和经济效益。
With the increasing size of seismic data,the repeated forward calculation method and hard-disk caching of wave field data are the main factors that limit the efficiency of reverse time migration calculations.To overcome this issue,a memory computing node of up to 1.5 Terabyte was proposed,that uses a hybrid memory technology to meet the memory storage requirements after the lossless compression of large field data,achieve the objective of minimizing the number of calculations for full-wave field data,solve the storage problem of large field data,and finally improve the migration calculation efficiency.A test using actual data showed that the proposed node configuration can improve the calculation efficiency of high-density shot data migration by over 46.1%.Consequently,the calculation time of large-scale seismic data reverse time migration can be significantly reduced,with reduced computational burden and energy consumption.The proposed method can also be applied to different seismic data processing software with large memory requirements,and thus has a large application and cost-saving potential.
作者
包红林
李敏
张萌
BAO Honglin;LI Min;ZHANG Meng(Sinopec Geophysical Research Institute,Nanjing 211103,China)
出处
《石油物探》
CSCD
北大核心
2021年第5期732-737,750,共7页
Geophysical Prospecting For Petroleum
基金
国家重大研发计划项目(2017YFB0202904)
中国石化顺北超深层QRTM地震成像技术应用研究项目(P20055-4)共同资助。
关键词
波动方程逆时偏移
计算效率
存储策略
混合内存
傲腾内存
GPU显存
协同计算
wave equation reverse time migration
computing efficiency
storage strategy
mixed memory
Optane DC Persistent Memory
GPU memory
collaborative computing
