GI枪结构震源子波模拟研究  

Source wavelet simulation of GI gun

作　　者：王立明[1,2] 胡毅[1] 王瑜[3] 刘保华[4] 许江[1] 

机构地区：[1]国家海洋局第三海洋研究所海洋与海岸地质实验室,厦门361005 [2]长安大学,西安710064 [3]厦门理工学院,厦门361005 [4]国家海洋局国家深海基地管理中心,青岛266061

出　　处：《地球物理学进展》2015年第6期2793-2796,共4页Progress in Geophysics

基　　金：国家自然科学青年基金项目(41204100);福建省自然科学基金资助项目(2013J05059);国家海洋局青年海洋科学基金(2013338);国家海洋局第三海洋研究所基本科研业务费专项资金项目(海三科2011026);南北极环境综合考察与评估专项(CHINARE2015-03-03;CHINARE2015-04-03-04)联合资助

摘　　要：GI枪不同于常规空气枪,它虽然使子波峰-峰值减少,但是具有较好的压制气泡振荡的优点.现在GI枪已经成为海上地震勘探主要震源激发方式之一.因此研究GI枪子波特性和模拟子波过程就有理论与现实意义.GI枪震源子波模型是依据GI枪激发特性,基于空气枪震源子波模型理论,以准静态开放式热力学系统与气泡振荡方程为依托建立的.模型根据模拟经验参数模拟震源子波结果,并与GI枪实测子波资料进行了对比,模拟结果表明能较好的吻合.文中同时给出子波模拟经验参数,使模型标准化.Different from conventional air-gun,GI gun has the advantage of better suppression of bubble oscillation although it reduces the peak-peak value reduce.Nowadays,GI gun has become one of the main sources of marine seismic exploration.Therefore,the study of GI gun wavelet characteristics and the simulation of wavelet process are theoretical and practical.Based on the excitation characteristics of GI gun and theory of air-gun source wavelet model, GI gun wavelet model is established linkages between the open quasi-static thermodynamical system and bubble oscillation equation.Compared with the results of measured wavelet data of GI guns,the simulated results are in good agreement with the experimental results.At the same time,empirical parameters of wavelet simulation are given to make the model standard.

关 键 词：GI枪 气泡振荡 模拟子波 子波模型 标准化 

分 类 号：P631[天文地球—地质矿产勘探]