地震采集中低截滤波的试验分析

Experimental analysis of low-cut filter in seismic acquisition

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257100

Tonggi University, Shanghai 210092

根据高分辨率地震勘探对高低频能量均衡的要求,对低截滤波进行了多次试验。通过试验分析,认为在胜利探区,进行1.0s以下地层勘探,在没有有效提高高频信噪比的条件下,应结合检波器的型号,不加或加小陡度的小低截滤波器。

Many experiments on low cut filter were carry out to meet the requirement that balance of high frequency energy and low frequency energy is necessity for high resolution seismic exploration. The experiments show that to retain the S/N ratio for predominant seismic wave band, on low cut filter or low cut filter with low dip should be applied varying with the type of geophones, if S/N ratio was not improved effectively for seismic exploration below 1.0s in Shengli prospect area.