SSR与DSR组合的波动方程速度建模方法及应用  

SSR and DSR wave equation velocity modeling technique and its application

作　　者：李录明[1,2] 罗省贤 

机构地区：[1]"油气藏地质及开发工程"国家重点实验室(成都理工大学),四川成都610059 [2]地球探测与信息技术教育部重点实验室,四川成都610059

出　　处：《石油地球物理勘探》2009年第5期630-636,527+650,共7页Oil Geophysical Prospecting

基　　金：国家重大产业技术开发专项(发改办高技[2005]2372号)资助

摘　　要：波动方程叠前深度偏移是目前解决复杂构造成像最有效的方法,而建立复杂构造的速度模型又是叠前深度偏移的关键。本文结合单平方根(SSR)和双平方根(DSR)波动方程偏移方法,提出并实现了一套行之有效的且适应纵、横向变速的波动方程偏移速度建模方法,将并行批量处理与交互式可视化技术相配合,开发了交互式波动方程偏移速度建模软件。该方法的特点是用单平方根(SSR)相移法偏移成像,用双平方根(DSR)方法做横向变速处理,所建模型既可是时间坐标的层速度,又可是深度坐标的层速度。经对理论模型及实际资料处理,证明了方法的正确性和有效性。Wave equation pre-stack depth migration is the most effective tool for imaging complex structures,while generating velocity model for the complex structures is a key step for pre-stack depth migration.In this paper based on Single Square Root(SSR) wave equation migration algorithm and Double Square Root(DSR) wave equation migration algorithm,a wave equation migration velocity model building technique was proposed and then was successfully developed,which is effective and works well even when vertical and lateral velocities change,by integrating batch processing with interactive visualization technology,the interactive wave equation migration velocity model building software was developed.The advantage of this technique is to use SSR to conduct phase shift method migration,and to utilize DSR to process lateral velocity change.The interval velocity of the final velocity model can be illustrated in both time domain and depth domain,and the theory model and field seismic data processing show that the technique is not only correct,but also effective for pre-stack depth migration.

关 键 词：复杂构造 波动方程 深度偏移 单平方根 双平方根 速度建模 

分 类 号：P631.443[天文地球—地质矿产勘探] TP391.9[天文地球—地质学]