海上地震资料多次波特征分析  

Offshore seismic data multiple characteristics analysis

作　　者：张军华[1] 王要森[1] 郑旭刚[1] 周振晓[1] 张雷 侯志强 魏赟 

机构地区：[1]中国石油大学(华东)资信学院,山东东营257061 [2]中海石油有限公司上海分公司,上海200030

出　　处：《石油地球物理勘探》2009年第5期574-577,共4页Oil Geophysical Prospecting

摘　　要：多次波是海上地震资料的主要干扰波,压制多次波的前提是正确地识别多次波。由于多次波有多种类型、多个周期,形成机制又相当复杂,因此研究多次波特征就显得十分重要。本文以B区海上资料为例,通过炮集多次波时距关系分析、海水速度计算、多次波速度谱特征总结、共炮检距道集自相关分析、SRME波动方程多次波预测,系统地研究了复杂地震资料多次波的基本特征,初步掌握了该区多次波的形成机制,从而为多次波的压制提供了理论依据。Multiples are the major noise for offshore seismic data,the key to eliminate the multiples is to recognize the noise.The multiples have many types,multi-cycles and their formation mechanisms are complex,thus it is necessary to study the multiple characteristics.Based on offshore seismic data from B-Block and through analysis of multiple time-distance curves for shot gathers、sea water velocity calculation、analysis of velocity spectrum for the multiples、 common-offset gather auto-correlation analysis and SRME(Surface-related multiple elimination) wave equation multiple prediction,the basic multiple characteristics were thoroughly studied and the brief multiple formation mechanisms were found out,it is believed that the studies provided the theoretic foundation for multiple suppression.

关 键 词：海上地震资料 多次波 时距关系 速度谱 自相关 SRME 

分 类 号：P618.13[天文地球—矿床学] P631.443[天文地球—地质学]