横波速度预测方法
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摘要
准确的横波测井速度是叠前地震反演和叠前地震属性分析的必要参数,然而实际生产中往往缺乏横波速度信息.采用经验公式往往精度有限,本文采用Biot-Gassmann低频速度模型,以及Pride公式建立起基质弹性模量与骨架弹性模量关系,证明了纵波速度大小随固结系数的增大而减小,因而可以通过迭代方式计算出合适的固结系数,进而得到横波速度大小.通过两个实例说明该方法能得到很高的预测精度.
Precise S-wave logging velocity is necessary parameter for prestack seismic inversion and prestack seismic properties analysis,however S-wave velocity information is always absent in the practical applications.Due to the limited accuracy with the experimental formula,using Biot-Gassmann low frequency velocity modeling and the relation between basic quality elastic moduli and bone elastic moduli built by Pride formula,it is proved that P-wave velocity decreases when consolidation parameter increases.So applicable consolidation parameter can be calculated with iteration and S-wave velocity.It is illustrated that very high predicted accuracy can be found.
Precise S-wave logging velocity is necessary parameter for prestack seismic inversion and prestack seismic properties analysis,however S-wave velocity information is always absent in the practical applications.Due to the limited accuracy with the experimental formula,using Biot-Gassmann low frequency velocity modeling and the relation between basic quality elastic moduli and bone elastic moduli built by Pride formula,it is proved that P-wave velocity decreases when consolidation parameter increases.So applicable consolidation parameter can be calculated with iteration and S-wave velocity.It is illustrated that very high predicted accuracy can be found.
引文
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[25]汪素云,裴顺平,许忠淮,张国民,俞言祥,潘华.利用ML振幅研究地壳横波Q值I:不同构造区的衰减特征[J].地球物理学报,2007,50(6):1740～1747.
[26]尹兵祥,杨剑萍,尹克敏.东营凹陷民丰断裂带地区地震反演及储层预测[J].石油物探,2007,46(5):484～487.
[27]丁继才,常旭,刘伊克,赵伟.基于声波方程的井间地震数据快速WTW反演方法[J].地球物理学报,2007,50(5):1527～1533.
[28]郭文波,宋建平,李貅,薛国强,樊金生.层状介质井中电测数值计算及其应用研究[J].地球物理学报,2006,49(5):1561～1566.
[29]崔炯成,刘洋,赵伟,等.斜井三维VSP观测系统设计[J].石油物探,2007,46(3):302～309.
[30]李明川,樊栓狮,赵金,金洲.多孔介质对天然气水合物形成的影响[J].石油物探,2007,46(1):13～15.
[31]王大兴,辛可锋,李幼铭,高静怀,伍向阳.地层条件下砂岩含水饱和度对波速及衰减影响的实验研究[J].地球物理学报,2006,49(3):908～914.
[2]Greenberg ML,Castagna J P.Shear-wave velocity estimation in porous rocks:Theoretical formulation,prelimulation,pre-liminary verification and applications[J].Geophysical Prospec-ting,1992,40(2):195～209.
[3]楚泽涵,陈丰,刘祝萍,路保平,林耀民.估算地层横波速度的新方法[J].测井技术,1995,19(5):313～318.
[4]Xu S Y,White R E.A physical model for shear-wave velocity predicting[J].Geophysical Prospecting,1996,44:687～717.
[5]Jorstad A,Mukerji T,Mavko G.Model-based shear-wave ve-locity estimation versus empirical regressions[J].Geophysical Prospecting,1999,47:785～787.
[6]云美厚,管志宁.储层条件下砂岩纵波和横波速度的理论计算[J].石油物探,2002,41(3):289～292,298.
[7]Xu S Y,White R E.A new velocity model for clay-sand mix-ture[J].Geophysical Prospecting,1995,43(1):91～118.
[8]Keys R G,Xu S Y.An approximationfor the Xu-White veloci-ty model[J].Geophyscis,2002.67(5):1406～1414.
[9]Han D H,Michael Batzle.Estimate Shear Velocity Based on Dry P-wave and Shear Modulus Relationship[J].74th Annual International Meeting,SEG,Expanded Abstracts,2004.
[10]王玉梅,苗永康,孟宪军.岩石物理横波速度曲线计算技术[J].油气地质与采收率,2006,13(4):58～61.
[11]Lee M W.Asimple method of predicting S-wave velocity[J].Geophyscis,2006,69(5):161～164.
[12]郭栋,王兴谋,印兴耀,吴国忱.横波速度计算方法与应用[J].油气地球物理,2007,5(3):18～22.
[13]马中高,解吉高.岩石的纵、横波速度与密度的规律研究[J].地球物理学进展,2005,20(4):905～910.
[14]王保丽,印兴耀,张繁昌.弹性阻抗反演及应用研究[J].地球物理学进展,2005,20(1):89～92.
[15]王立明,李庆春.选择相关法提高转换波速度分析精度[J].地球物理学进展,2006,21(4):1213～1220.
[16]许士勇,马在田.快速有效的转换波共转换点叠加技术[J].地球物理学报,2002,45(4):557～568.
[17]苑春芳,彭苏萍,杨良梁.水平界面上P-SV转换波转换点的精确解[J].地球物理学报,2005,48(5):1179～1184.
[18]朱留方,沈建国.从阵列声波测井波形处理地层纵、横波时差的新方法[J].地球物理学进展,2006,21(2):483～488.
[19]刘国萍,陈小宏,李景叶.弹性波阻抗在时移地震中的应用分析[J].地球物理学进展,2006,21(2):559～563.
[20]马劲风.地震勘探中广义弹性阻抗的正反演[J].地球物理学报,2003,46(1):118～124.
[21]徐梅,谭明友,张明振,等.垦东滩海上第三系油藏地震描述技术[J].石油物探,2007,46(6):633～636.
[22]吕铁良,王永刚,谢万学,等.稀疏脉冲反演技术在井间地震反演中的应用[J].石油物探,2007,46(1):58～63.
[23]井西利,杨长春,王世清.一种改进的地震反射层析成像方法[J].地球物理学报,2007,50(6):1831～1836.
[24]孙成禹,万学娟,倪长宽.弱连接界面地层地震反射波场的正演方法[J].石油物探,2007,46(5):425～432.
[25]汪素云,裴顺平,许忠淮,张国民,俞言祥,潘华.利用ML振幅研究地壳横波Q值I:不同构造区的衰减特征[J].地球物理学报,2007,50(6):1740～1747.
[26]尹兵祥,杨剑萍,尹克敏.东营凹陷民丰断裂带地区地震反演及储层预测[J].石油物探,2007,46(5):484～487.
[27]丁继才,常旭,刘伊克,赵伟.基于声波方程的井间地震数据快速WTW反演方法[J].地球物理学报,2007,50(5):1527～1533.
[28]郭文波,宋建平,李貅,薛国强,樊金生.层状介质井中电测数值计算及其应用研究[J].地球物理学报,2006,49(5):1561～1566.
[29]崔炯成,刘洋,赵伟,等.斜井三维VSP观测系统设计[J].石油物探,2007,46(3):302～309.
[30]李明川,樊栓狮,赵金,金洲.多孔介质对天然气水合物形成的影响[J].石油物探,2007,46(1):13～15.
[31]王大兴,辛可锋,李幼铭,高静怀,伍向阳.地层条件下砂岩含水饱和度对波速及衰减影响的实验研究[J].地球物理学报,2006,49(3):908～914.
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