高精度相位相关速度分析技术在海上地震资料中的应用

摘要

海上复杂构造区地震资料数据信噪比低,以叠加能量法为主的常规速度分析方法其速度分辨率和精度不能满足精细处理的要求.以南海东部某工区为靶区,对比研究了高精度相位相关速度分析法与常规叠加能量速度分析法,前者提高了速度谱在空间和时间上的精度,得到效果较好的地震叠加剖面,特别是低信噪比区域的成像精度有较大提高.%The marine seismic data have low signal-to-noise ratio.It impacts the velocity resolution with conventional stack energy velocity analysis method far from meeting the requirements of the fine processing.At the working area of the South Sea,we compared the phase correlation statistics analysis velocity method with conventional stack energy velocity analysis,and used the former method to improve the accuracy of the velocity spectrum in space and time and acquired better effects of the seismic stack profile.Especially the imaging accuracy is improved greatly in low SNR region.