低频气枪的激发机理与设计

Low frequency air gun excitation mechanism and design

气枪震源作为海洋地震勘探的主要激发源,从六十年代Chelminski出现后一直沿用至今。纵观海洋地震勘探的发展史,海上震源技术的发展速度远低于接收技术,已经成为了提高成像质量的制约因素,主要体现在震源低频需要拓展、低频能量不足等方面。同时,随着公众环保意识的增强,降低不必要的对海洋生物影响较大的高频成分也成为了业内的一个需要解决的问题。本文在阐述气枪的激发机理的基础上,探讨了低频气枪的设计思路,为今后气枪震源技术发展提供技术参考。

Air gun sources have been used since the emergence of Chelminski in the 1960 s as the main excitation source for marine seismic exploration.Throughout the history of marine seismic exploration,the development speed of offshore seismic source technology is much lower than that of receiving technology,which has become a constraint factor to improve the imaging quality,mainly reflected in the need to expand the low frequency of seismic source,the low frequency energy is insufficient.At the same time,with the increase of public awareness of environmental protection,the reduction of unnecessary high frequency components that have a large impact on marine life has become a problem to be solved in the industry.Based on the excitation mechanism of air gun,the design idea of low frequency air gun is discussed in this paper,which provides technical reference for the development of air gun source technology in the future.