GI结构气枪震源在海上地震勘探中的应用

Application of GI air gun seismic source in offshore seismic exploration

GI结构气枪震源在海上地震作业中有很多明显的优势。GI结构气枪震源具有双气室,能够较好地压制气泡振荡。GI结构气枪震源激发所产生的子波主脉冲和气泡的初泡比明显大于其他类型的气枪,GI结构气枪震源激发所产生的子波具有明显的峰值和较小的旁瓣。本文介绍GI结构气枪震源在海上地震勘探中的应用配置以及工作原理,同时对于GI结构气枪震源与导航系统以及数据采集系统联机时会出现不同步等问题进行了解析并找到解决办法,对海上地震勘探有一定的参考和实用价值。

GI(Generator Injector) air gun has many obvious advantages in offshore seismic operation. GI air gun has double air chambers, which can better suppress bubble oscillation. The initial bubble ratio of the wavelet main pulse and bubble generated by GI air gun excitation is significantly larger than that of other types of air guns. The wavelet generated by GI air gun excitation has obvious peak and small side lobe. This paper introduces the application configuration and working principle of GI air gun in offshore high-resolution seismic exploration. At the same time, it analyzes the problems such as non-synchronization when GI air gun is connected with navigation system and data acquisition system, and finds solutions, which has certain reference and practical value for offshore high-resolution seismic operation.