摘要
利用有限差分法解程函方程，分别求出震源点及接收点到反射界面任意点的初至旅行时，将两者相加，即可得到总旅行时与界面水平坐标关系曲线。由Fermat原理可知，该曲线上的极值点相对应的时间为反射旅行时，相对应的水平坐标值为反射点位置。本方法不但可计算出任意检波点能接收到的所有的反射液的旅行时及射线路径，而且具有快速、准确、适应复杂构造模型的优点。
The first break times from seisrnic source and receiving point to any reflectionpoint can be calculated respectively by solving eikonal eqllation with the use of finitedifference. Then the two first break times are added together to bring relationalcurve between the total travel time and the horizontal coordinates of reflection inter-face. From Fermat principle, we can know that the time corresponding to extremepoint of the curve is reflection travel time,and horizontal coordinate correspondingto the extreme point is the location of reflection point. This method can be used toestirnate both travel times and ray paths of the reflection waves which are receivedby all geophone groups. It is efficient,accurate and adaptable to complicated struc-ture model.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
1995年第1期50-55,共6页
Oil Geophysical Prospecting
关键词
射线追踪
反射波
地震波
地震勘探
ray tracing, reflection wave, eikonal equation, finite difference method
