摘要
以塔里木前陆盆地地质背景为模型,采用三维任意差分精细积分方法并行算法实现了库车地区三维正演模拟.三维任意差分精细积分方法通过时间域采用局部积分半解析方法求得波动方程的递推算子,与常规的差分法相比计算精度有较大提高;文中计算稳定性根据实际算例进行分析,采用稳定因子约束,得到较好的稳定性;边界条件采用改进的自适应吸收边界,并通过串行程序并行化,大大减少了三维正演模拟的耗时,完成了大数据量三维正演模拟.
On the basis of the geological background of Tarim foreland basin, this paper realizes parallel three-dimensional forward modeling in Kuqa area by using three-dimensional arbitrary difference precise integration algorithm. Compared with the conventional differential method, the three-dimensional arbitrary difference precise integration algorithm has greatly improved the precision by using the time domain local integral semi-analytical method to obtain the recursion operator of wave equations. In this paper, according to the actual examples analysis, the stability of calculation gets better owing to the stable factor constraints; by using an improved adaptive absorbing boundary and the parallelization of serial program, the time consumption of three-dimensional forward modeling is greatly reduced and a large amount of three-dimensional forward modeling is finished.
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
2010年第8期1875-1882,共8页
Chinese Journal of Geophysics
基金
国家重点基础研究计划项目(973)(2007CB209602)资助
关键词
三维地震正演
并行算法
吸收边界条件
任意差分精细积分
3-D seismic forward, Parallel algorithm, Absorbing boundary condition, Arbitrary difference precise integration
