摘要
在三维正演模拟定位原理基础上 ,以单程声波方程作为波场外推手段 ,实现三维叠前反射波场模拟 ,完全克服了全波方程模拟的 3个问题。在波场外推中 ,使用波动方程的混合解法 ,即以波动方程解析解 (相位移法 )为主 ,在介质速度横向变化的地方 ,用数值解 (45°有限差分 )作补充 ,使得整个算法精确、快速 ,既能处理复杂构造 ,又能适应速度的任意变化。
dmension positioning principle of forward modeling was presented on the basis of extrapolating wave field by one-way acoustic wave equation.The method of 3-dimension pre-stack reflection wave field modeling,whichcould completely solve the three problems of full acoustic wave forward modeling was deduced.In the course of wave field extrapolation,analytic method of wave equation was employed,and numeric method was also used as complement under the condition of lateral velocity variation.The whole process is accurate,speedy,and can deal with complex structure and random velocity variation.
出处
《矿物岩石》
CAS
CSCD
北大核心
2002年第3期93-97,共5页
Mineralogy and Petrology
关键词
三维定位原理
声波方程
三维反射波
正演模拟
混保延拓法
地震信号处理
positioning principle
acoustic wave equation
3-dimension reflection wave
forward modeling
hybrid extrapolating method