基于GPU并行加速的黏声最小二乘逆时偏移及应用  

Least-squares reverse time migration in visco-acoustic medium based on GPU parallel acceleration and its application

作　　者：张猛[1] ZHANG Meng(Geophysical Research Institute,Sinopec Shengli Oilfield Company,Dongying 257022,Shandong,China)

机构地区：[1]中国石化胜利油田分公司物探研究院,山东东营257022

出　　处：《岩性油气藏》2022年第1期148-153,共6页Lithologic Reservoirs

基　　金：中国石化股份公司项目“基于AI地震资料自动化处理技术研究”(编号:P20052-2)资助。

摘　　要：常规逆时偏移算法(RTM)在浅层成像中容易产生较强的低频噪声,无法消除地球介质的吸收衰减效应。基于广义标准线性固体模型,建立黏声波动方程,在Born正演和梯度计算2个核心算法过程中开展了GPU加速,建立了黏声最小二乘逆时偏移实现流程,并将该方法应用在胜利油田某探区三维资料中,结果显示,计算效率和偏移成像质量都得到了有效提升。并且开展了与常规声波最小二乘逆时偏移的对比和分析工作,结果表明该方法对提升深层储层成像精度,实现真振幅成像,以及岩性油气藏的勘探都具有重要的意义。Conventional reverse time migration(RTM)algorithm is easy to produce strong low-frequency noise in shallow imaging,which cannot eliminate the absorption attenuation effect of earth medium.Based on the generalized standard linear solid model,the visco-acoustic wave equation was established,GPU acceleration was carried out in the two core algorithms of Born forward and gradient calculation,and the implementation process of leastsquares reverse time migration algorithm in visco-acoustic medium was proposed.The method was applied to a 3 D data in the exploration area of Shengli Oilfield.The results show that the calculation efficiency and migration imaging quality are improved effectively.The comparison with conventional acoustic least-squares reverse time migration was carried out.The results show that this method is of great significance to improve the imaging accuracy of deep reservoirs,realize true amplitude imaging,and explore lithologic reservoirs.

关 键 词：GPU并行加速 黏声介质 最小二乘逆时偏移 波动方程 

分 类 号：P631.4[天文地球—地质矿产勘探]