气水界面上的法向反射系数研究
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摘要
探讨地震频带内气水界面上的法向反射系数随频率的变化特征。分别利用新场气田和Denneman et al.(2002)模型的岩石和流体属性参数,建立了弹性孔隙介质的气水界面模型,然后,讨论了Gurevich et al.(2004)法向反射系数和Silin and Goloshubin(2010)的法向反射系数的简化计算方程。利用简化方程和建立的气水界面模型进行了计算,并探索了地震频带内法向反射系数随频率变化的规律。结果表明,Silin and Goloshubin(2010)的渐进方程的方法能有效反映地震频带内气水界面上反射系数随频率的变化。渐进方程的反射系数方法可用于研究实际气水界面上反射系数随频率的变化现象。
This paper approaches the variation features of normal reflection coefficients with frequency on the gas/water interface in a seismic frequency band and establishes the gas/water models of elastic porous medium by using the porous rock and porous fluid parameters from the Xinchang gas field and Denneman et al.(2002) model,respectively.Then,it discusses the simplified equations of normal reflection coefficients from Gurevich et al.(2004) and Silin and Goloshubin(2010),and calculates the normal reflection coefficients using the simplified equations and the built gas/water interface model and searches for the variation rule of normal reflection coefficients with frequency in a seismic frequency band.The results show that the method of asymptotic equation of Silin and Goloshubin(2010) can effectively indicate the variation of reflection coefficients with frequency on the gas/water interface in a seismic frequency band.So the asymptotic equation is an effective way to study the phenomenon of normal reflection coefficients with frequency on a real gas/water interface.
This paper approaches the variation features of normal reflection coefficients with frequency on the gas/water interface in a seismic frequency band and establishes the gas/water models of elastic porous medium by using the porous rock and porous fluid parameters from the Xinchang gas field and Denneman et al.(2002) model,respectively.Then,it discusses the simplified equations of normal reflection coefficients from Gurevich et al.(2004) and Silin and Goloshubin(2010),and calculates the normal reflection coefficients using the simplified equations and the built gas/water interface model and searches for the variation rule of normal reflection coefficients with frequency in a seismic frequency band.The results show that the method of asymptotic equation of Silin and Goloshubin(2010) can effectively indicate the variation of reflection coefficients with frequency on the gas/water interface in a seismic frequency band.So the asymptotic equation is an effective way to study the phenomenon of normal reflection coefficients with frequency on a real gas/water interface.
引文
[1]Gurevich B,Ciz R,Denneman A I M.Simple expres-sions for normal incidence reflection coefficients froman interface between fluid-saturated porous materials[J].Geophysics,2004,69:1372-1377.
[2]Xu Duo.Seismic normal reflection based on the as-ymptotic equation in porous media[R].The Centrefor Reservoir Geophysics,Imperial College London,2011.
[3]Biot M A.Theory of propagation of elastic waves in afluid-saturated porous solid,I:low-frequency range[J].J Acoust Soc Am,1956,28:168-178.
[4]Biot M A.Theory of propagation of elastic waves in afluid-saturated porous solid,II:higher frequencyrange[J].J Acoust Soc Am,1956,28:179-191.
[5]Dvorkin J,Nur A.Dynamic poroelasticity:A unifiedmodel with the squirt and the Biot mechanisms[J].Geophysics,1993,58:524-533.
[6]许多.双相介质储层参数非线性反演[D].成都:成都理工大学档案馆,2008.
[7]肖思和,许多,李勇,等.基于双相介质的AVO技术在气水储层识别中的探索应用[J].成都理工大学学报:自然科学版,2009,36(5):546-550.
[8]Goloshubin G M,Silin D B.Using frequency-depend-ent seismic attributes in imaging of a fractured reser-voir[C]//Expanded Abstracts,76th SEG AnnualMeeting,New Orleans,2006:1742-1746.
[9]Goloshubin G M,Korneev V A,Silin D B,et al.Reservoir imaging using low frequencies of seismic re-flections[J].The Leading Edge,2006,25:527-531.
[10]Goloshubin G,Silin D,Vingalov V,et al.Reser-voir permeability from seismic attribute analysis[J].The Leading Edge,2008,27:376-381.
[11]Biot M A.Mechanics of deformation and acousticpropagation in porous media[J].Journal of AppliedPhysics,1962,33:1482–1498.
[12]Silin D B,Goloshubin G M.An asymptotic model ofseismic reflection from a permeable layer[J].TranspPorous Media,2010,83,233-256.
[13]Denneman A I M,Drijkoningen G G,Smeulders DM J,et al.Reflection and transmission of waves ata fluid/porous-medium interface[J].Geophysics,2002,67:282-291.
[14]Gan Q,Xu D,Tang J,et al.Seismic resolution en-hancement for tight-sand gas reservoir characteriza-tion[J].Journal of Geophysics and Engineering,2009,6:21-28.
[15]Gassmann F.ber die Elastizitt porser Medien[J].Vierteljahrscr Nat Ges Zür,1951,96:1-23.
[16]Pride S R,Berryman J G.Linear dynamics ofdouble-porosity dual-permeability materials,II:Flu-id transport equations[J].Phys Rev E,2003,68:1-10.
[17]Silin D B,Korneev V A,Goloshubin G M,et al.Low-frequency asymptotic analysis of seismic reflec-tion from a fluid-saturated medium[J].Transp Por-ous Media,2006,62:283-305.
[2]Xu Duo.Seismic normal reflection based on the as-ymptotic equation in porous media[R].The Centrefor Reservoir Geophysics,Imperial College London,2011.
[3]Biot M A.Theory of propagation of elastic waves in afluid-saturated porous solid,I:low-frequency range[J].J Acoust Soc Am,1956,28:168-178.
[4]Biot M A.Theory of propagation of elastic waves in afluid-saturated porous solid,II:higher frequencyrange[J].J Acoust Soc Am,1956,28:179-191.
[5]Dvorkin J,Nur A.Dynamic poroelasticity:A unifiedmodel with the squirt and the Biot mechanisms[J].Geophysics,1993,58:524-533.
[6]许多.双相介质储层参数非线性反演[D].成都:成都理工大学档案馆,2008.
[7]肖思和,许多,李勇,等.基于双相介质的AVO技术在气水储层识别中的探索应用[J].成都理工大学学报:自然科学版,2009,36(5):546-550.
[8]Goloshubin G M,Silin D B.Using frequency-depend-ent seismic attributes in imaging of a fractured reser-voir[C]//Expanded Abstracts,76th SEG AnnualMeeting,New Orleans,2006:1742-1746.
[9]Goloshubin G M,Korneev V A,Silin D B,et al.Reservoir imaging using low frequencies of seismic re-flections[J].The Leading Edge,2006,25:527-531.
[10]Goloshubin G,Silin D,Vingalov V,et al.Reser-voir permeability from seismic attribute analysis[J].The Leading Edge,2008,27:376-381.
[11]Biot M A.Mechanics of deformation and acousticpropagation in porous media[J].Journal of AppliedPhysics,1962,33:1482–1498.
[12]Silin D B,Goloshubin G M.An asymptotic model ofseismic reflection from a permeable layer[J].TranspPorous Media,2010,83,233-256.
[13]Denneman A I M,Drijkoningen G G,Smeulders DM J,et al.Reflection and transmission of waves ata fluid/porous-medium interface[J].Geophysics,2002,67:282-291.
[14]Gan Q,Xu D,Tang J,et al.Seismic resolution en-hancement for tight-sand gas reservoir characteriza-tion[J].Journal of Geophysics and Engineering,2009,6:21-28.
[15]Gassmann F.ber die Elastizitt porser Medien[J].Vierteljahrscr Nat Ges Zür,1951,96:1-23.
[16]Pride S R,Berryman J G.Linear dynamics ofdouble-porosity dual-permeability materials,II:Flu-id transport equations[J].Phys Rev E,2003,68:1-10.
[17]Silin D B,Korneev V A,Goloshubin G M,et al.Low-frequency asymptotic analysis of seismic reflec-tion from a fluid-saturated medium[J].Transp Por-ous Media,2006,62:283-305.
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