| 海上地震勘探GI枪子波数值模拟 |
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| 引用本文： | 李国发,曹明强,陈浩林,倪成洲.海上地震勘探GI枪子波数值模拟[J].吉林大学学报(地球科学版),2011,41(1):277-282. |
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| 作者姓名： | 李国发 曹明强 陈浩林 倪成洲 |
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| 作者单位： | 中国石油大学,CNPC物探重点实验室,北京,102249;中国石油东方地球物理公司,海上勘探事业部,天津,300280 |
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| 基金项目： | 国家"973"计划项目，中国石油科技创新基金 |
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| 摘 要： | GI枪震源已经逐步成为海上地震勘探的主要激发方式。常规气枪只有一个腔室,而GI枪具有G腔和I腔2个腔室,能够较好地压制气泡振荡。基于自由气泡振动理论,分析GI枪的激发机制,在考虑气泡壁的热传导作用和流体粘度对气泡振动影响的基础上,建立了海上勘探GI枪子波数值模型,并对气泡的振动过程和远场地震子波进行了数值模拟。结果表明:当G腔内气体释放所形成的气泡体积达到最大时,I腔内气体的释放有效地抑制了气泡的收缩,气泡壁运动速度明显减小,气泡变得稳定;GI枪激发所产生的子波具有明显的峰值和较小的旁瓣,有利于高分辨率海上地震勘探。
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| 关 键 词： | 海上勘探 子波 GI枪 数值模拟 热传导 |
Numerical Simulation of the GI Air Gun Signature in Offshore Seismic Exploration |
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| LI Guo-fa,CAO Ming-qiang,CHEN Hao-lin,NI Cheng-zhou .Key Laboratory of Geophysical Exploration of China National Petroleum Corporation,China University of Petroleum,Beijing ,China .Offshore Exploration.Numerical Simulation of the GI Air Gun Signature in Offshore Seismic Exploration[J].Journal of Jilin Unviersity:Earth Science Edition,2011,41(1):277-282. |
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| Authors: | LI Guo-fa CAO Ming-qiang CHEN Hao-lin NI Cheng-zhou Key Laboratory of Geophysical Exploration of China National Petroleum Corporation China University of Petroleum Beijing China Offshore Exploration |
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| Institution: | LI Guo-fa1,CAO Ming-qiang1,CHEN Hao-lin2,NI Cheng-zhou2 1.Key Laboratory of Geophysical Exploration of China National Petroleum Corporation,China University of Petroleum,Beijing 102249,China 2.Offshore Exploration Department,BGP INC.,China National Petroleum Corporation,Tianjin 300280,China |
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| Abstract: | GI air gun is becoming the main shooting source in offshore seismic exploration.With two gas chamber,named chamber G and chamber I,it can suppress bubble oscillation much better than conventional air gun with only one gas chamber.Based on free bubble oscillation theory,the working mechanism of GI air gun is analyzed,and the numerical model of GI air gun signature is established considering the effects,such as heat transfer across the bubble wall and fluid viscosity,on bubble oscillation.The model is used to... |
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| Keywords: | offshore exploration signature GI air gun numerical simulation heat transfer |
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