随时间推移(TL)地震勘探处理方法研究  

Processing method study for time-lapse seismic exploration

作　　者：凌云[1] 高军[1] 张汝杰[1] 王丹[2] 

机构地区：[1]石油地球物理勘探局 [2]辽河油田地调处

出　　处：《石油地球物理勘探》2001年第2期173-179,共7页Oil Geophysical Prospecting

摘　　要：随时间推移（ＴＬ）地震勘探已经在油田开发领域见到了一些成功的实例，关于ＴＬ地震勘探的可行性论证也有不少文章讨论过。但是对于陆上薄互层（储层厚度小于１０ｍ）、大地吸收较强、信噪比较低和严重空变激发、接收因素影响条件下的ＴＬ地震可行性论证和数据处理还存在一些问题需要解决。本文从实际地震数据问题（如 ５０Ｈz工业干扰、地层吸收，激发能量和频率空变、近地表鸣震干扰和接收器影响等问题）分析入手，发现这些问题难以用常规处理和互均衡处理方法来解决。为此，本文针对以上问题提出了特殊的处理方法和流程，较好地消除了这些干扰影响，并在不采用工均衡处理条件下获得ＴＬ地震储层的差异信息。Time-lapse (TL) seismic exploration has seen some successful real cases in oil development fields and there are also many articles that discussed the feasibility proof of TL seismic exploration. But there are still often some problems need to be solved for feasibility proof of TL seismic exploration and data processing in such conditions as land thin interlayer (thickness of reservoir is less than 10 m ),strong ground absorbtion,poorer signal-to-noise ratio and effect of shot and receiver factors with severe special changes. Starting from analysis of real seismic data problems (such as 50 Hz industrial interference, formation absorption, special change in shot energy and frequency,near-surface reverberation interference and receiver effects etc),the paper discovered that these problems are often difficult to be solved if using conventional processing methods and cross-equalization process. For this reason, the paper presented special processing methods and flow scheme aimed at above-mentioned problems, better diminished influences of these interference and obtained difference information on TL seismic reservoir in a condition of without using cross-equalization process.

关 键 词：随时间推移 地震勘探 吸收衰减 50Hz工业干扰 鸣震干扰 检波器响应 

分 类 号：P631.443[天文地球—地质矿产勘探]