摘要
本文讨论了粘弹介质的地震波响应。假定介质为块状,且块中纵,横波速度及密度、品质因数横向分段线性连续变化。在此条件下,给出了粘弹波动方程制作时间剖面的数学模型,导出了相应的有限元方程并给出其计算方法(包括刚度矩阵、阻尼矩阵)。模拟某实际水平叠加剖面的仿真结果,展示了该方法的效果和水平。
Seismic response in viscoelastic medium is discussed here. The assumption is made that P-wave velocity, S-wave velocity, density and Q factor show lateral piecewise linear continuous variations in block media. Under the above assumption, mathematical model for making seismic time section with the use of viscoelastic wave equation is developed; the relevant finite-element wave equation is derived; and the calculation method for the finite-element equation, including stiffness matrix and damping matrix, is given in the paper. The effect of simulating a real horizontal stack section shows that this method is feasible.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
1990年第3期245-259,共15页
Oil Geophysical Prospecting
关键词
非均匀介质
粘弹波动方程
刚度矩阵
地震模型
nonuniform medium
wave equation in viscoelastic medium
stiffness matrix
seismic model