焉耆盆地复杂构造区叠前偏移处理技术研究  

Processing Technique of Pre-stack Migration in Complex Structures of Yanqi Basin

作　　者：李锋[1] 

机构地区：[1]中国地质大学(武汉)地球物理与空间信息学院

出　　处：《石油天然气学报》2007年第6期74-77,共4页Journal of Oil and Gas Technology

摘　　要：针对焉耆盆地地下构造复杂,地表多为湖泊沼泽,偏移成像精度要求相对较高的特点,提出叠前深度偏移是该地区偏移成像的首选方法。简要叙述了叠前深度偏移Kirchhoff积分方法和炮域波动方程偏移方法的基本原理,以及偏移速度模型精确建立的主要方法,讨论了影响叠前深度偏移成像效果的因素并给出实例。实际处理效果表明,在精确构建速度模型的基础上,对焉耆盆地复杂构造进行叠前深度偏移,所取得的效果较常规偏移有本质的改进,值得大力推广。In consideration of the characteristics of complex subsurface structure,many lakes and wamps in the surface and the relatively high precision of migration image in Yanqi Basin,it was proposed that pre-stack depth migration was selected for migration imaging.The basic principle of Kirchhoff method for pre-stack depth migration,the shot-field wave equation method and the main methods of precise foundation of migration velocity method were described,but also the factors influencing pre-stack depth migration imaging were discussed and an example was provided.The actual processing effects show that based on the precisely establishing the velocity model,the effect of pre-stack depth migration for the complicated structure of Yanqi Basin is much better than that of normal migration.It can be introduced in oilfields.

关 键 词：叠前偏移 复杂构造 焉耆盆地 

分 类 号：P631.44[天文地球—地质矿产勘探]