毛士博,宋鹏,李西双,等. 基于多重网格的电火花枪阵震源波场正演模拟[J]. 海洋地质前沿,2022,38(3):52-58. DOI: 10.16028/j.1009-2722.2021.188
    引用本文: 毛士博,宋鹏,李西双,等. 基于多重网格的电火花枪阵震源波场正演模拟[J]. 海洋地质前沿,2022,38(3):52-58. DOI: 10.16028/j.1009-2722.2021.188
    MAO Shibo, SONG Peng, LI Xishuang, et al. Forward modeling of spark gun array source wavefield based on multi-grid[J]. Marine Geology Frontiers, 2022, 38(3): 52-58. DOI: 10.16028/j.1009-2722.2021.188
    Citation: MAO Shibo, SONG Peng, LI Xishuang, et al. Forward modeling of spark gun array source wavefield based on multi-grid[J]. Marine Geology Frontiers, 2022, 38(3): 52-58. DOI: 10.16028/j.1009-2722.2021.188

    基于多重网格的电火花枪阵震源波场正演模拟

    Forward modeling of spark gun array source wavefield based on multi-grid

    • 摘要: 基于电火花震源的超高分辨率地震勘探在我国的海洋区域调查以及工程地球物理勘探中发挥着重要的作用。实际勘探时,电火花震源间隔通常为厘米级,为电火花枪阵波场的数值模拟带来困难。针对这一问题,在常规变网格有限差分算法的基础上,在电火花枪阵波场的数值模拟中提出了多重网格策略,实现了基于多重网格算法的电火花枪阵波场高精度三维数值模拟。数值模拟实验表明,相比于常规的交错网格有限差分数值模拟,基于多重网格有限差分数值模拟算法能够显著提高计算效率,降低内存消耗,同时还可有效地压制常规变网格算法中的虚假反射现象,实现电火花枪阵震源波场的高精度数值模拟。

       

      Abstract: Ultra-high resolution seismic exploration based on sparker has become more important with time in marine regional geological survey and engineering geophysical exploration in China. In practical performance, the distance between sparkers is usually in a scale of centimeter, and thus it is difficult to carry out numerical simulation for spark gun array. To solve this problem, based on the conventional variable grid finite difference algorithm, this paper proposed a multi-grid strategy in the numerical modeling of spark gun array, and realized the high-precision 3D numerical modeling of the spark gun array based on the multi-grid algorithm. Numerical simulation experiments show that comparing to conventional staggered-grid finite difference numerical simulation, the multi-grid finite difference numerical simulation algorithm can significantly improve the computational efficiency and reduce the memory consumption. At the same time, it can effectively suppress the false reflection in the conventional variable grid algorithm, and realize the high-precision numerical simulation of the spark gun array.

       

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