平面气枪阵列远场子波模拟及优化  

Simulation and optimization of far-field signature of planar air-gun arrays

作　　者：叶亚龙[1] 李艳青[2] 张阿漫[1] 

机构地区：[1]哈尔滨工程大学船舶工程学院,黑龙江哈尔滨150001 [2]中海油田服务股份有限公司物探事业部,天津300451

出　　处：《石油地球物理勘探》2015年第1期8-13,7,共6页Oil Geophysical Prospecting

基　　金：深水宽频震源技术研究项目;国防基础科研项目(B2420133001);国家自然科学基金项目(51379039);黑龙江省杰出青年科学基金项目(JC201307)联合资助

摘　　要：气枪阵列的远场压力子波具有良好的地震特性,被广泛应用于海底资源勘探。本文在前人基础上建立了气泡动力学方程,并在上述模型中加入简化的热力学模型,仅需知道气枪的工作压力、工作容积即可计算出远场压力子波。另外,针对平面阵列,对Ziolkowski模型进行了修正及简化,再将上述模型计算结果与Nucleus软件模拟结果对比,发现两者吻合良好。最后,结合粒子群算法对气枪平面阵列进行优化,发现在气枪阵列总体积变化较小时即可有效增大气泡比,并探讨了气枪容积在优化前后的变化规律,为气枪震源研究提供重要参考。Far-field signatures of air-gun arrays are widely used for seabed resource exploration because of their good seismic properties.We establish in the paper a new bubble dynamics model based on previous studies.Given a gun working pressure and a working volume,far-field pressure wavelets can be calculated by adding simplified thermodynamic methods to the above model.In order to simulate planar air-gun array,Ziolkowski air-gun array model has been revised and simplified.Numerical simulation results of the proposed approach meet well that of Nucleus software simulation.Finally,to optimize planar air-gun array,we combine the proposed model with particle swarm optimization.It is found that the primary/bubble amplitude ratio will increase when the total volume has little change.Our work on far-field signatures of air-gun array provides some references for the future research of air-gun array.

关 键 词：气枪阵列 远场子波 粒子群优化 

分 类 号：P631[天文地球—地质矿产勘探]