海上气枪阵列震源子波数值模拟研究  

A numerical simulation of wavelets from offshore air-gun array seismic source

作　　者：李绪宣 温书亮 顾汉明[2] 杨凯[3] 王建花 

机构地区：[1]中海石油研究中心,100027 [2]中国地质大学武汉 [3]中海油田服务股份有限公司

出　　处：《中国海上油气》2009年第4期215-220,共6页China Offshore Oil and Gas

基　　金：国家重点基础研究发展计划(973计划)“南海深水区复杂地质结构地震采集基础理论研究”(2009CB219403)资助部分研究成果

摘　　要：基于海上地震勘探气枪理论模型,开展了单枪、单一子阵列、立体阵列震源子波数值模拟研究。结果表明,单一子阵列可以很好地提高子波主脉冲值,并在压制气泡脉冲方面具有较好的效果;立体阵列可以较好地抑制由于海面虚反射等因素引起的陷波作用,其子波频谱较平面阵列子波频谱光滑。气枪立体阵列组合能够有效地提高子波质量,对其开展更深入的研究与试验具有重要意义。Based on the air-gun theory model of offshore seismic exploration, a numerical simulation of wavelet was conducted for single air gun, single sub-array and volume array. The simulation results show that the single sub-array can greatly enhance the value of primary pulse and suppress the bubble efficiently. Compared with the plane array, the volume array can more efficiently suppress the notch caused by ghost reflection at sea level, and has more smooth frequency spectra. In addition, the volume array is important to further detailed researches and tests due to its effect to improve wavelet quality.

关 键 词：海上 气枪阵列 子阵列 立体阵列 震源 子波 数值模拟 

分 类 号：P631.46[天文地球—地质矿产勘探] TP316[天文地球—地质学]