海洋地震气枪震源试验

EXPERIMENT ON MARINE SEISMIC AIR GVN SOVRCE

地质部第一海洋地质调查大队

First Marine Geological Survey Brigade, Ministry of Geology

本文简要地介绍了海洋地震气枪震源试验所采用的测试方法和结果,分析了单枪与组合气枪声讯号的波形、振幅和频谱。各种容量的气枪组合,对抑制气泡效应有明显的效果,并可以增强声讯号主脉冲的声压,改善其频率特性,较好地满足海上地震勘探的需要。

This article mainly describes the testing method and the results of seismic air-gun source experiments. Analysis has been made for the waveform, the amplitude and the spectrum of the acoustic signal from single gun and gun arrays. The use of the array of guns with different chamber volumes could evidently attenuate the influence of the bubble, enhance the acoustic pressure of the primary pulse of acoustic signal and improve Its frequency characteristics. Hence, it is thought to be good for marine seismic exploration.