TTI介质变网格模拟的菱形网格技术  

Rhombic Grid Technology in TTI Medium Variable Grid Simulation

作　　者：朱文新 何兵寿[1,2] Zhu Wenxin;He Bingshou(Ocean University of China,Qingdao,Shandong 266100;Key Lab of Submarine Geosciences and Prospecting Techniques,MOE,China,Qingdao,Shandong 266100)

机构地区：[1]中国海洋大学,山东青岛266100 [2]海底科学与探测技术教育部重点实验室,山东青岛266100

出　　处：《中国煤炭地质》2020年第4期72-79,85,共9页Coal Geology of China

基　　金：国家重点研发计划(编号:2018YFC1405900);中央高校基本科研业务费专项(编号:201822011);国家自然科学基金(编号:41674118,41574105);国家重大科技专项(2016ZX05027-002-005)联合资助

摘　　要：数值模拟是研究地震波传播机理的重要工具,也是地震资料采集、处理、和反演领域的重要内容。基于常规矩形网格或交错网格的差分算法存在模拟精度和计算量之间的矛盾,变网格技术可以缓解这一矛盾,但对于TTI介质,常规变网格、变系数差分算法无法实现各分量的交错对应,旋转网格与旋转交错网格技术存在同样的问题。针对上述问题,提出了一种适用于TTI介质正演的新方法:即菱形交错网格剖分法,并给出了基于菱形交错网格的变系数、变网格方法,实现了TTI介质中弹性波场的高精度模拟。The numerical simulation is an important tool to study seismic wave propagation mechanism,also main component in domains of seismic data acquisition,processing and inversion.Based on the conventional rectangle grid or staggered grid differential algorithms have existed contradictions between simulation accuracy and computation amount.Although the variable grid can relieve the contradiction,but to the TTI medium,conventional variable grid,variable coefficient differential algorithms can not realize staggered correspondence between components,also same issues in rotational grid and rotational staggered grid techniques.In allusion to above issues,put forward a new method adaptable to TTI medium forward.That is rhombic staggered gridding method and provided out variable coefficient and variable grid method based on rhombic staggered grid and realized TTI medium elastic wave field high accuracy simulation.

关 键 词：TTI介质 弹性波 数值模拟 变网格 菱形网格 

分 类 号：P631.4[天文地球—地质矿产勘探]