利用VSP技术进行地层压力预测
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摘要
VSP技术是一种地震速度观测技术。利用密度曲线和合适的子波对VSP资料进行反演,计算出精确的地层速度,从而得到地层压力是一种行之有效的方法。地层压力是钻井工程与施工设计的重要依据,可以利用地层压力确定套管程序、水泥浆密度及钻井液密度。垂直地震剖面VSP是一种通过在沿井孔布置检波器来接收有效波的地震观测方法,具有反射振幅强、信噪比高、波场信息丰富的特点。本文通过对VSP资料进行处理,并且结合压力预测基本原理计算出地层压力,具有很高的可靠性和实效性。
VSP technology is a kind of seismic velocity observation technology.It is available that VSP data are inversed with density curve and suitable wavelet to work out accurate formation velocity,thereby to achieve formation pressure.Formation pressure,which can be used to determine casing programme,cement paste density and drilling fluid density,is an important foundation for drilling engineering and working design.Vertical seismic profile VSP is a seismic observation method that the detector is placed along the borehole to receive effective waves which has characteristics of strong reflection amplitude,high signal-to-noise ratio and rich wave field information.In the paper,VSP data are processed to calculate the formation pressure with combination of pressure prediction principle.It has high reliability and effectiveness.
VSP technology is a kind of seismic velocity observation technology.It is available that VSP data are inversed with density curve and suitable wavelet to work out accurate formation velocity,thereby to achieve formation pressure.Formation pressure,which can be used to determine casing programme,cement paste density and drilling fluid density,is an important foundation for drilling engineering and working design.Vertical seismic profile VSP is a seismic observation method that the detector is placed along the borehole to receive effective waves which has characteristics of strong reflection amplitude,high signal-to-noise ratio and rich wave field information.In the paper,VSP data are processed to calculate the formation pressure with combination of pressure prediction principle.It has high reliability and effectiveness.
引文
[1]陆基孟,地震勘探原理(下册)[M],北京:石油大学出版社,1993:312-315.
[2]李振春,地震数据处理方法[M],东营:中国石油大学出版社,2006:57-59.
[3]周郡、谢春辉、杨鹏,VSP处至逐层递推反演层速度[J],物探与化探,2012,36(2):243-244.
[4]徐兆辉、刘震、李永新等,地层压力早期预测方法在泰国湾盆地的应用[J],大庆石油地质与开发,2011,30(1):243-244.
[5]余本善、王彦春、张良庆等,基于Qt的VSP波场分离系统的设计与实现[J],物探与化探,2012,36(3):486-487.
[2]李振春,地震数据处理方法[M],东营:中国石油大学出版社,2006:57-59.
[3]周郡、谢春辉、杨鹏,VSP处至逐层递推反演层速度[J],物探与化探,2012,36(2):243-244.
[4]徐兆辉、刘震、李永新等,地层压力早期预测方法在泰国湾盆地的应用[J],大庆石油地质与开发,2011,30(1):243-244.
[5]余本善、王彦春、张良庆等,基于Qt的VSP波场分离系统的设计与实现[J],物探与化探,2012,36(3):486-487.
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