关于岩石三阶弹性常数的超声测量方法
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摘要
油气储层岩石的三阶弹性常数反映了该岩石的速度应力敏感性,是利用声波测井或地震资料进行原位地应力反演的基本参数。本文阐述了利用声弹性理论在实验室测量岩石三阶弹性常数的原理与方法,并给出了部分实验结果。这些参数将为研究声波在预应力声场中传播规律的提供基础数据,同时也为定量分析利用交叉偶极声波测井评价地应力的精度提供了依据。不同岩石的三阶弹性常数较大差异表明,通过速度各向异性进行应力反演时必须考虑岩石本身非线性的差异。
Third order elastic constants of reservoir rock reflect its sensitivity of velocity to stress.They are the parameters to invert in situ stress from sonic log or seismic data.Based on acoustelastic theory,this paper gives the principle and method to measure these constants in laboratory.The paper provides third elastic constants of some rocks.These are the basic data to study acoustic or elastic wave propagation in prestressed rock and to evaluate the precision of inversion stress by cross-dipole sonic logging.Great difference of third elastic constants for different rocks shows that it is necessary to get a set of third elastic constants of the rock to determine the stress by velocity anisotropy.
引文
[1]MEEGAN G.D,JOHNSON P A,GUYER R A,et al.Observations onnonlinear elastic wave behavior in sandstone[J].J.Acoust.Soc.Am.,1993,94:3387.
    [2]DUTTA N C.Geopressure prediction using seismic data:Currentstatus and the road ahead[J].Geophysics,2002,67(6):2012-2041.
    [3]WINKLER K W,SINHA B K,PLONA T J.Effects of boreholestress concentration on dipole anisotropy[J].Geophysics,1998,63:11-17.
    [4]陈浩,王秀明,赵立新.交叉偶极子声测井多频率反演地层三阶弹性常数和地应力研究[J].球物理学报,2009,52(6):1663-1674.
    [5]李刚,王克协,刘金霞,等.套管井应力集中下正交偶极声测井的声弹理论、数值分析与实例[J].地球物理学报,2006,49(1):295-304.
    [6]曹正良,王克协,李刚,等.井孔压力与地层应力集中诱导的偶极弯曲波的分裂[J].地球物理学报,2003,46(5):712-718.
    [7]TANG X M,CHENG N Y,CHENG A.Identifying and EstimatingFormation Stress from Borehole Monopole and Cross-dipoleAcoustic Measurements[C].SPWLA 40th Annual LoggingSymposium,1999.
    [8]WINKLER K W,LIU,X.Measurements of third-order elasticconstants in rocks[J],J.Acoust.Soc.Am,1996,100:1392.
    [9]WINKLER K W,MCGOWN L.Nonlinear acoustoelastic constantsof dry and saturated rocks[J].Journal of geophysical research,2004,109:B10204.
    [10]YIN H,RASOLOFOSAON P.Nonlinear and linear elastic behaviorof anisotropic rocks:Ultrasonic experiments versus theoreticalpredictions[C].SEG Technical Program ExpandedAbstracts,1994:1129-1132.
    [11]姜文华.测量三阶弹性常数的非线性声学方法[J].物理,1994:231-235
    [12]王寅观,邵良华.三阶弹性常数的超声测量方法[J].同济大学学报,1995,23(5):552-557.
    [13]THURSTON R N,BRUGGER K.Third-order Elastic constants andthe velocity of small amplitude elastic waves in homogeneouslystressed Media[J]Physical Review,1964,133:A1604-1610.
    [14]YIN H.Acoustic Velocity and Attenuation of Rocks:Intrinsicanisotropy and Stress-induced Anisotropy[D].Ph.D dissertation,Stanford University,1993.

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