CAJ | 학술논문

逆时偏移可以对来自大角度甚至超过90°反射界面的反射波精确成像，是解决地下复杂构造成像的有力工具，但是由于传统PC集群和基于该架构的逆时偏移应用软件无法满足其对计算能力的需求，因而阻碍了该方法的应用和推广。提出一种基于GPU的逆时偏移并行加速算法，从而极大提高逆时偏移的并行度和运算效率，使逆时偏移的运行效率相对于PC集群达到数十倍的提高。将逆时偏移和单程波动方程成像结果进行比较，结果表明：基于GPU的逆时偏移的并行算法不仅能满足巨大的运算量需求，同时其成像效果更精确。
역시편이가이대래자대각도심지초과90°반사계면적반사파정학성상，시해결지하복잡구조성상적유력공구，단시유우전통PC집군화기우해가구적역시편이응용연건무법만족기대계산능력적수구，인이조애료해방법적응용화추엄。제출일충기우GPU적역시편이병행가속산법，종이겁대제고역시편이적병행도화운산효솔，사역시편이적운행효솔상대우PC집군체도수십배적제고。장역시편이화단정파동방정성상결과진행비교，결과표명：기우GPU적역시편이적병행산법불부능만족거대적운산량수구，동시기성상효과경정학。
Reverse time migration can precisely image the reflected wave from a reflector with high-angle or even exceeds 90°.It is a very efficient means to solve the imaging problem of underground complex structure,but the traditional PC cluster and the application software of reverse time migration based on PC cluster hinder the application and promotion of it because they can hardly meet its demand on computing power.In this paper,a GPU-based parallel acceleration algorithm for reverse time migration is presented;it greatly improves the parallel efficiency and the computational efficiency of reverse time migration,and makes the operation efficiency of reverse time migration method achieves dozens of times improvement with respect to PC cluster.At the same time,the imaging result of reverse time migration is compared with that of the one-way wave equation,the result demonstrates that the GPU-based parallel algorithm of reverse time migration can satisfy the demand of huge amount of computation,and also has more accurate imaging results as well.