GD地区环境干扰的认识与压制

Identification and suppression of ambient noises in GD area

1. 上海同济大学,上海200092;2. 胜利石油管理局地球物理勘探开发公司,山东东营257100

1. Tongji University, Shanghai 200092,Chian;2. Geophysical Exploration and Development Company of Shengli Petroleum Administration, Dongying 257100,China

在地震勘探中,环境干扰是影响地震信噪比的重要因素之一。GD地区由于开发程度较高,工区东部工业干扰源密布,对地震资料采集影响较大。通过对该类干扰波特征的定量和定性分析,认为与一般环境干扰相比,它具有干扰频带低、持续时间长、干扰强度大的特点。根据这些特点,提出一些压制环境干扰的方法.

In seismic exploration ambient interfere is one of key factors affecting the S/N ratio of seismic data. Owing to higher development degree, man made intense interference sources are densely covered in the east of GD area, deteriorating quality of the acquired seismic data greatly. After quantitative and qualitative analysis of the interference waves, this paper points out that they are characterized by low frequency, long time duration, and high intensity. Some effective methods are proposed to suppress the ambient interference that yields satisfactory results.