地震资料中的大钻干扰波分析及压制方法  

Analysis and suppression of drilling interference in seismic data

作　　者：王立歆[1] 韩文功[2] 吕小伟[3] 吴常玉[3] 

机构地区：[1]同济大学海洋与地球科学学院 [2]中国石化股份胜利油田分公司 [3]中国石化股份胜利油田分公司物探研究院

出　　处：《石油地球物理勘探》2007年第5期526-534,共9页Oil Geophysical Prospecting

摘　　要：在油田进行地震数据采集时,由于区内的钻机正在工作,必将在地震资料中引起大钻干扰噪声。本文详细分析了大钻干扰波的传播规律及其在不同域中的表现特征,并针对大钻干扰波的特点,提出了余弦逼近法压制大钻干扰波的技术。通过余弦逼近法去除大钻干扰波与采用F-X相干噪声衰减技术及陷波法去除大钻干扰波的效果比较,认为余弦逼近法要比其他方法压制效果好,主要表现在压制大钻干扰波的同时又能最大限度的保留有用信息。When carrying out seismic data acquisition in oilfield,because of drilling rig working in the area, which cases interferent noises in seismic data. The ?paper analyzed in detail the propagating rule of drilling interference and presented feature in different domain, and proposed using cosine approach method to suppress drilling interference in accordance with its characters. Comparing using cosine approach algorithm with using FX coherent noise attenuation technique and notch filtering method in the aspect of suppressing drilling interference, we considered that the cosine method is better than other methods in suppression of interference,mainly showed in maximum reservation of useful data while suppression of drilling interference.

关 键 词：大钻干扰 余弦逼近 频率扫描 

分 类 号：P631.443[天文地球—地质矿产勘探]