地震仪器对高频信息可记录性的影响及其试验

Influence of seismograph on the recording of high frequency information

1. 中国地质大学, 武汉430074;2. 中原油田物探公司, 濮阳457001

Department of Applied Geophysics, China University of Geosciences, Wuhan 430074

本文较系统地讨论了地震仪器性能及因素对高分辨率地震勘探的影响,指出仪器的瞬时动态范围和低截止频率是高频信息可记录性的一个极为重要的基本因素、通过不同低截频、不同陡度及不同频率检波器的实际试验．说明了选用“三高”(即较高的陡度和低截止频率、较高频率的检波器)仪器因素对提升深层反射波的频率有独到的作用,是一种有效的工作方法。

This paper systematically reviews the influence of seismograph performance and parameters on high resolution seismic exploration. It is pointed out that the instantaneous dynamic range and low cut filter of seismograph are an important basic condition of high-frquency in formation recordibility. According to the results from practical test of varied low cut frequencies,steepness.and geophones of different frequencies,etc,we conclude that "three high ", (high steepness and low cut filter,high-frequency geophone) criterion plays an exclusive role in receiving high frequency components of deep reflection and is effective in high-resolution seismec exploration.