椭圆展开共反射点叠加方法的应用研究

• 作 者: 周青春 刘怀山 Kondrashkov V V 李国都 林依华 高静怀
• 机 构: 中国海洋大学海底科学与探测技术教育部重点实验室,北京恒泰艾普石油勘探开发技术有限公司,All-Russian Research Institute of Exploration Geophysics,
• 出 处: 地球物理学报
• 发表日期: 2009年01期
• 关键词: 椭圆展开 速度分析 共反射点(CRP)叠加 零偏移距剖面 共中心点(CMP)

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.

This paper introduces in detail the principle of elliptic expansion of the common reflection point (CRP) under uniform media conditions and introduces two parameters (velocity ratio and average velocity of the upgoing and downgoing waves) to solve the overlay imaging under non-uniform media conditions. The calculated velocity is the true total reflection point stacking acceleration. Combined with the theoretical model calculation and seismic data processing, it is proved that the CRP method can obtain exact reflection reflections acceleration and correct zero offset for complex geological sections From the profile, the resulting imaging is far superior to the traditional centroid (CMP) method.