椭圆展开共反射点叠加方法的应用研究

Research and application of ellipse evolving common reflection point stack method

本文详细介绍了均匀介质条件下椭圆展开共反射点（CRP）叠加原理,并引入双参数（上行波与下行波的速度比和平均速度）来解决非均匀介质条件下的叠加成像,严密论证了所求得的速度是真正的共反射点叠加速度,并结合理论模型计算和地震资料处理证实,利用椭圆展开CRP方法可以对复杂地质剖面求取准确的共反射点叠加速度和正确的零偏移距剖面,得到的成像效果远优于传统共中心点（CMP）方法.

The paper introduces detailed principle of ellipse evolving Common Reflection Point（CRP）stack in the homogeneous media,and introduces two parameters（ratio of up-going wave velocity to down-going wave velocity and average velocity）for heterogeneous media.It reasons rigorously out that evaluated velocity is the real CRP stack velocity with practical geological meaning.The theoretical model computing and seismic data processing confirm that we can use ellipse evolving CRP stack to work out accurate CRP stack velocity and correct zero-offset section of complex geology section.And the effect of imaging is markedly superior to that of conventional Common Midpoint（CMP）method.