多级大阵列井下检波器在VSP勘探中的应用  

Application of multi-level (large array) downhole geophone in VSP prospecting

作　　者：徐刚 储仿东 刘国军 

机构地区：[1]东方地球物理公司井中地震中心,河北涿州072751

出　　处：《物探装备》2010年第3期151-154,共4页Equipment for Geophysical Prospecting

摘　　要：随着井下采集装备技术的不断进步,VSP勘探的井下检波器由模拟向数字转化,检波器级数由单级向多级转变甚至大阵列发展。多级大阵列井下检波器在技术上具有子波一致性好,地震波场稳定,数据处理时三分量旋转、合成更简单更精确等优点。使其在生产中,减少了占井时间,降低了安全风险,极大地提高了施工效率。本文从常规VSP、Walkaway-VSP和3D-VSP项目入手分析了多级大阵列的优点,解决了地面地震处理解释中的某些难点,展示了多种良好的应用效果。With the progress of downhole data acquisition technology, downhole geophone applied for VSP exploration changed from analog to digital and continously developed toward multi-level and even large array. Multi-level （large array） downhole geophone has the obvious advantages including good wavelet coherence, stable wavefield, three- components rotation,simple synthesis and high accurate. In the VSP prospecting, this kind of geophone can reduce the well-occupying time, lower down the security risk and enormously improve the production efficiency. This paper introduced the advantages of multi-level （large array） downhole geophone through conventional VSP.walkaway-VSP and 3D-VSP, those advantages can successfully solve some difficulties in surface seismic data processing and intero- peration and show upstanding application effects.

关 键 词：测井 多级阵列 井下检波器 VSP Walkaway-VSP 3D—VSP 

分 类 号：P631.4[天文地球—地质矿产勘探]