VSP多波旅行时反演
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摘要
本文基于几何地震学原理,分别利用VSP直达波、反射纵波及上行转换横波旅行时反演层速度。直达波旅行时反演只能获得检波点所在井段地层的速度;上行纵波旅行时反演能获得最深检波器以下地层的速度,即井底以下地层的速度;上行转换横波旅行时反演则能获得横波速度。本文主要研究利用VSP直达波和上行反射波求取井段及井底以下地层的速度,最终根据三维VSP资料获取三维速度体。
On the basis of geometric seismic principle,this paper employs travel-time of VSP down-going P wave,up-going P-P wave and up-going P-S wave to calculate interval velocity.Down-going P wave travel time may get the interval velocity above the receivers.Up-going P-P wave travel time may get the interval velocity below the receivers.Up-going P-S wave travel time may get the S-wave interval velocity.Finally we obtain the 3D velocity volume velocity for the zone of interest using the first arrival travel-time inversion.
On the basis of geometric seismic principle,this paper employs travel-time of VSP down-going P wave,up-going P-P wave and up-going P-S wave to calculate interval velocity.Down-going P wave travel time may get the interval velocity above the receivers.Up-going P-P wave travel time may get the interval velocity below the receivers.Up-going P-S wave travel time may get the S-wave interval velocity.Finally we obtain the 3D velocity volume velocity for the zone of interest using the first arrival travel-time inversion.
引文
[1]Dix C H.The interpretation of well-shot dataⅡ.Geo-physics,1945,10(1):160～170
[2]Stewart R R.VSP interval velocity from travel timeinversion.Geophysical Prospecting,1984,32(4):608～628
[3]Stewart R R.3-D VSP:Recent history and futurepromise.CREWES Research Report,1997,9
[4]Stewart R R.Seismic versus sonic velocities:A verti-cal seismic profiling study.Geophysics,1984,49(8):1153～1168
[5]Lines L R,Bourgeois A and Covey J D.Traveltimeinversion of offset vertical seismic profiles-A feasibili-ty study.Geophysics,1984,49(3):250～264
[6]Salo E L and Schuster G T.Traveltime inversion ofboth direct and reflected arrivals in vertical seismicprofile data.Geophysics,1989,54(1):49～56
[7]Lee M W.Traveltime inversion using transmittedwaves of offset VSP data.Geophysics,1990,55(8):1089～1097
[8]贺元凯.VSP速度分析.石油地球物理勘探,1987,22(3):341～344He Yuan-kai.Velocity analysis of VSP.OGP,1987,22(3):341～344
[9]王成礼,叶古清.利用非零井源距VSP资料计算层速度.石油地球物理勘探,1988,23(5):616～619Wang Cheng-li,Ye Gu-qing.Calculation velocity bythe use of nonzero offset VSP data.OGP,1988,23(5):616～619
[10]周熙襄,钟本善.用旅行时反演确定层速度的横向变化.石油地球物理勘探,1992,27(1):59～72Zhou Xi-xiang,Zhong Ben-shan.Determination oflateral interval velocity variation using travel time in-version.OGP,1992,27(1):59～72
[11]陈信平.由VSP初至时间反演层速度的算法和误差估计.石油地球物理勘探,1992,27(6):744～752Chen Xin-ping.Method for interval velocity inversionusing VSP first break time and the error estimation.OGP,1992,27(6):744～752
[12]庄东海.VSP资料求层速度的射线追踪折线法.江汉石油学院学报,1994,16(4):50～53Zhuang Dong-hai.Ray-tracking method of computinginterval velocities for VSP.Journal of Jianghan Pe-troleum Institute,1994,16(4):50～53
[13]邬世英,孙赞东.VSP速度反演中雅可比矩阵计算的一种新方法.石油地球物理勘探,2010,45(1):6～9Wu Shi-ying and Sun Zan-dong.A new approach forJacobian matrix calculation in VSP velocity inversion.OGP,2010,45(1):6～9
[14]朱键,王永昌.利用上行波进行VSP数据旅行时反演.西安工程学院学报,1999,21(3):44～48Zhu Jian,Wang Yong-chang.Travel time inversion ofVSP using upward wave.Journal of Xi’an Engi-neering University,1999,21(3):44～48
[15]徐仲达,郝晓红,徐翔之等.用VSP数据中下行P-SV转换横波求取横波速度.石油物探,2002,41(3):274～278Xu Zhong-da,Hao Xiao-hong,Xu Xiang-zhi et al.Es-timation of velocities of shear-waves using downwardconverted P-SV waves in VSP data.GPP,2002,41(3):274～278
[16]张继国.VSP横波速度反演实用性研究.石油地球物理勘探,2006,41(6):697～705Zhang Ji-guo.Study of practicality of VSP S-wavevelocity inversion.OGP,2006,41(6):697～705
[17]李云龙,严又生,白俊辉等.轮古38井三维VSP数据采集方法探讨.石油物探,2006,45(3):299～303Li Yun-long,Yan You-sheng,Ban Jun-hui et al.Re-search into 3-D VSP acquisition method for Well Lun-gu 38.GPP,2006,45(3):299～303
[2]Stewart R R.VSP interval velocity from travel timeinversion.Geophysical Prospecting,1984,32(4):608～628
[3]Stewart R R.3-D VSP:Recent history and futurepromise.CREWES Research Report,1997,9
[4]Stewart R R.Seismic versus sonic velocities:A verti-cal seismic profiling study.Geophysics,1984,49(8):1153～1168
[5]Lines L R,Bourgeois A and Covey J D.Traveltimeinversion of offset vertical seismic profiles-A feasibili-ty study.Geophysics,1984,49(3):250～264
[6]Salo E L and Schuster G T.Traveltime inversion ofboth direct and reflected arrivals in vertical seismicprofile data.Geophysics,1989,54(1):49～56
[7]Lee M W.Traveltime inversion using transmittedwaves of offset VSP data.Geophysics,1990,55(8):1089～1097
[8]贺元凯.VSP速度分析.石油地球物理勘探,1987,22(3):341～344He Yuan-kai.Velocity analysis of VSP.OGP,1987,22(3):341～344
[9]王成礼,叶古清.利用非零井源距VSP资料计算层速度.石油地球物理勘探,1988,23(5):616～619Wang Cheng-li,Ye Gu-qing.Calculation velocity bythe use of nonzero offset VSP data.OGP,1988,23(5):616～619
[10]周熙襄,钟本善.用旅行时反演确定层速度的横向变化.石油地球物理勘探,1992,27(1):59～72Zhou Xi-xiang,Zhong Ben-shan.Determination oflateral interval velocity variation using travel time in-version.OGP,1992,27(1):59～72
[11]陈信平.由VSP初至时间反演层速度的算法和误差估计.石油地球物理勘探,1992,27(6):744～752Chen Xin-ping.Method for interval velocity inversionusing VSP first break time and the error estimation.OGP,1992,27(6):744～752
[12]庄东海.VSP资料求层速度的射线追踪折线法.江汉石油学院学报,1994,16(4):50～53Zhuang Dong-hai.Ray-tracking method of computinginterval velocities for VSP.Journal of Jianghan Pe-troleum Institute,1994,16(4):50～53
[13]邬世英,孙赞东.VSP速度反演中雅可比矩阵计算的一种新方法.石油地球物理勘探,2010,45(1):6～9Wu Shi-ying and Sun Zan-dong.A new approach forJacobian matrix calculation in VSP velocity inversion.OGP,2010,45(1):6～9
[14]朱键,王永昌.利用上行波进行VSP数据旅行时反演.西安工程学院学报,1999,21(3):44～48Zhu Jian,Wang Yong-chang.Travel time inversion ofVSP using upward wave.Journal of Xi’an Engi-neering University,1999,21(3):44～48
[15]徐仲达,郝晓红,徐翔之等.用VSP数据中下行P-SV转换横波求取横波速度.石油物探,2002,41(3):274～278Xu Zhong-da,Hao Xiao-hong,Xu Xiang-zhi et al.Es-timation of velocities of shear-waves using downwardconverted P-SV waves in VSP data.GPP,2002,41(3):274～278
[16]张继国.VSP横波速度反演实用性研究.石油地球物理勘探,2006,41(6):697～705Zhang Ji-guo.Study of practicality of VSP S-wavevelocity inversion.OGP,2006,41(6):697～705
[17]李云龙,严又生,白俊辉等.轮古38井三维VSP数据采集方法探讨.石油物探,2006,45(3):299～303Li Yun-long,Yan You-sheng,Ban Jun-hui et al.Re-search into 3-D VSP acquisition method for Well Lun-gu 38.GPP,2006,45(3):299～303
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