【摘要】 波动方程有限差分法正演模拟对地震属性、资料地质解释、地震波传播规律、储层评价等研究均具有重要意义。波动理论正演方法是对建立的模型进行网格化的方法,根据波动方程近似,按时间步长迭代计算波场,获得正演波场模拟结果,但有限差分技术求解波动方程时会带来不必要的震动,即数值频散。文章探讨了引起数值频散的原因,并以高阶交错网格差分和通量校正传输(FCT)相结合的方法为基础消除数值频散。更多还原

【Abstract】 The finite difference of forward modeling of wave equation is of great significance for seismic attributes,the data of geological interpretation,seismic wave propagation and reservoir evaluation studies.The establishment of the model is divided to grid,based on wave equation approximation, calculation by time step iterative of wave field,access to the results of the forward wave field simulation.However,solving the wave equation finite-difference technique will cause unnecessary vibration,which is numerical dispersion.In this paper,I discusses the reasons caused by the numerical dispersion,and based on a combination of methods of order difference equations and flux corrected transport(FCT) to eliminate numerical dispersion.更多还原