塔里木地区老地震资料精细处理技术及应用  

The Application of Fine Processing Technique of Old Seismic Data to Tarim Basin

作　　者：刘江 

机构地区：[1]中石化地球物理公司中南分公司,湖南湘潭411104

出　　处：《工程地球物理学报》2017年第1期90-98,共9页Chinese Journal of Engineering Geophysics

摘　　要：由于塔里木西部地区老地震资料具有采集年代久、干扰波发育、信噪比低、纵横向速度变化大和构造复杂等特点,给处理和解释造成了很大的困难。本次研究针对低信噪比老地震资料构造成像难的问题,采取了约束层析反演静校正、远偏移距信息(包含小偏移距初至下的有效反射信息和大偏移距的广角反射信息)处理和共反射面元叠加等一系列精细处理技术,特别是通过对远偏移距有效反射信息的精细识别、提取和保留处理,充分利用远偏移距有效信息,提高了资料的信噪比及成像质量。并在此基础上开展了塔里木地区老地震资料精细处理技术的应用研究,取得了良好的应用效果,可以为低信噪比老地震资料的精细处理提供借鉴。In the west Tarim basin,the old seismic data have the characteristics of aging ac-quisition, development of interference wave,low signal-to-noise ratio,big change of verti-cal and horizontal velocity,complex structure, etc .,so both of the processing and interpre-ting are in trouble. This study,aiming at the problem of how to construct structure ima-ging of old seismic data,adopts a series of fine processing techniques such as constraints of tomographic inversion statics correction,far offset information processing （including effec-tive reflection information of small offset, wide-angle reflection information of large off-set） ,stack of common reflection surface,etc. Especially,it increases the quality of signal-to-noise ratio and imaging through the methods of fine recognition and extract ion,retention processing and full use for far offset＇s effective inf lection information . In addition,this paper carries out the application study of fine processing technique of old seismic data to Tarim basin,which obtains good effects and provides references for fine processing of old seismic data.

关 键 词：老地震资料 层析反演 广角反射 共反射面元 精细处理 

分 类 号：P631.4[天文地球—地质矿产勘探]