一种改进的SRME方法在陆地表面多次波压制中的应用  

Application of an improved SRME method in eliminating land surface multiples

作　　者：齐鹏 杨金龙 胡守旺 QI Peng;YANG Jin-Long;HU Shou-Wang(Geophysical Research Institute Co.,Ltd.,SINOPEC,Nanjing 211103,China)

机构地区：[1]中石化石油物探技术研究院有限公司,江苏南京211103

出　　处：《物探与化探》2024年第5期1331-1336,共6页Geophysical and Geochemical Exploration

基　　金：国家自然科学基金企业创新发展联合基金(U19B6003)。

摘　　要：表面多次波压制是地震资料处理的重要环节。目前海洋资料处理中最常用的SRME方法可以有效预测表面多次波模型,通过匹配相减实现多次波压制。但是SRME方法需要全波场信息,对观测系统要求比较严格,受陆上不规则采集限制难以在陆上处理中应用推广。为此,引入一种改进的SRME方法,通过构建最小误差约束函数,将临近道进行时差校正参与多次波预测,提升对复杂观测系统的适应性。将该方法应用于实际陆地地震资料处理,通过对表面多次波压制前后的道集、速度谱、叠前时间偏移剖面以及合成记录的对比,验证了该方法的有效性。Surface-related multiple elimination(SRME)is vital in processing seismic data.At present,the SRME method most commonly used for processing marine data can effectively predict surface-related multiple models,achieving multiple elimination through matching and subtraction.However,this method requires full wave field information,thus placing higher demands on observation systems.The irregular land data acquisition makes it difficult to apply this method for processing land data.Hence,this study presented an improved SRME method,which performs moveout correction on adjacent channels for multiple prediction by constructing the minimum error constraint function,thus enhancing the adaptability to complex observation systems.The improved SRME method was applied to process the actual seismic data of land.Its effectiveness was validated by comparing the gathers,velocity spectra,prestack time migration profiles,and synthetic seismograms before and after SRME.

关 键 词：自由表面多次波 多次波预测 不规则数据 多次波压制 陆地资料 

分 类 号：P631.4[天文地球—地质矿产勘探]