多级大阵列井下检波器在VSP勘探中的应用
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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 interoperation and show upstanding application effects.
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 interoperation and show upstanding application effects.
引文
1朱光明,垂直地震剖面方法,石油工业出版社,1988
2严又生,宜明理,魏新,许增魁等.三维三分量VSP数据处理方法及效果,石油地球物理勘探,2005,40(1),18～24
3宋玉龙,三维VSP地震勘探技术,石油工业出版社,2005
4Zengkui Xu,Yousheng Yan,Mingli Yi and Xin Wei.3-C offset VSP PP,PSVand SSi magings for sub-salt struc-ture:a case study in DB1well-site,Tari m Basin,P.R.China.The SEG Meeting,2005,2661～2664
5Xin Wei,Yousheng Yan,Zengkui Xu and Mingli Yi.3C-VSP i maging and absorption coefficient esti mation.The SEG Meeting,2005,2665～2668
6Mingli Yi.3C-VSPi maging and absorption coefficient es-ti mation.The SEG Meeting,2005,2665～2668
2严又生,宜明理,魏新,许增魁等.三维三分量VSP数据处理方法及效果,石油地球物理勘探,2005,40(1),18～24
3宋玉龙,三维VSP地震勘探技术,石油工业出版社,2005
4Zengkui Xu,Yousheng Yan,Mingli Yi and Xin Wei.3-C offset VSP PP,PSVand SSi magings for sub-salt struc-ture:a case study in DB1well-site,Tari m Basin,P.R.China.The SEG Meeting,2005,2661～2664
5Xin Wei,Yousheng Yan,Zengkui Xu and Mingli Yi.3C-VSP i maging and absorption coefficient esti mation.The SEG Meeting,2005,2665～2668
6Mingli Yi.3C-VSPi maging and absorption coefficient es-ti mation.The SEG Meeting,2005,2665～2668
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