摘要
根据地震勘探反射波法中众所周知的关于速度谱的思想,本文提出折射波速度谱的概念,因为折射波速度谱的计算是沿直线而不是双曲线进行叠加,本文提出一种经济的获取折射波速度谱的方法—利用τ—P变换的结果求取。计算折射波速度谱不仅利用了初至波,也利用了续至折射波,故结果精度十分高;此外,折射波速度谱在折射层的精细划分中,特别是当层很薄或位于屏蔽层之下时,起着重要作用。
According to the well-known idea in calculating velocity spectrum using seismic reflection data, a concept of refraction velocity spectrum is introduced. Because the stack for calculation of refraction velocity spectrum is taken along straight lines, not along the hypcrbolas, an economic methodc alculating refraction velocity spectrum by τ-P transformation can be developed. Not only first arrivals, but also refraction continuous arrivals are used to calculate the refraction velocity spectrum, so the resolution of the result is high. In addition, refraction velocity spectrum plays an important rule in precise division of refractors, especially when the bed is too thin or the refractor is under a hidden layer.
出处
《物探化探计算技术》
CAS
CSCD
1989年第3期225-230,共6页
Computing Techniques For Geophysical and Geochemical Exploration
