气枪震源子波特征及应用研究  

Wavelet characteristics of air gun source and its effect

作　　者：朱书阶[1] 

机构地区：[1]煤炭科学研究总院西安研究院,陕西西安710054

出　　处：《勘探地球物理进展》2008年第4期265-269,共5页Progress in Exploration Geophysics

摘　　要：介绍了气枪震源激发的子波特征、选择沉枪深度的原则和各种气枪组合的原理。在经典自由气泡理论的基础上,对不同海域和不同海流流速条件下,气枪震源激发子波特征存在的差异,特别是初泡比相差很大的情况,作了较详尽的数学论证。引入流体速度势概念,由伯努利方程推导出气泡外壁压强分布公式,探索性地提出:当沉枪较浅时,气泡震荡过程不仅取决于静水压强,而且与海流作用在气泡外壁的压强也息息相关。This paper discussed the wavelet characteristics that are stimulated by air gun source,the principles of determining the depth of air gun deployment,and theory of air gun array.Based on the classic theory of free bubbles,this paper derived mathematically differences of air gun source wavelet in different sea area and different ocean current speed,particularly in case of large P/B ratio.By introducing the concept of fluid velocity potential,the author derived the pressure distribution at bubble wall from Bernoulli's equation,and concluded that air bubble shake process is not only dependent on the intensity of hydrostatic pressure,but also closely related to the intensity of pressure that ocean current acts on the air bubble wall.

关 键 词：气枪子波 初泡比 子波理论模型 速度势函数 气泡震荡 

分 类 号：P631.4[天文地球—地质矿产勘探]