纵波速度频散属性反演方法研究
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摘要
利用与频率有关的地震属性进行储层特征描述一直是地球物理学家研究的热点,由于含烃类储层会造成地震波的衰减和速度频散,因此,反映速度频散的属性在一定程度上可以指示含烃类储层。基于弥散介质界面反射系数随频率变化的假设,通过研究纵波法向入射时反射振幅随频率的变化规律,推导了包含表征纵波速度频散程度属性的反射系数近似公式,构建了反演方程,通过小波域分频和贝叶斯三参数反演分别得到分频地震数据和密度相对变化量,最终反演得到频散属性数据体。模型实验和实际资料的应用结果表明,纵波速度频散属性对含气储层具有较好的指示效果。
The application of frequency-dependent seismic attributes for reservoir characterization is always the research focus of geophysicists. It is noticed that the anomalously high attenuation and velocity dispersion is associated with hydrocarbon reservoirs and the attribute about velocity dispersion can be used to indicate the hydrocarbon reservoir.Based on the assumption that reflection coefficient on interface between dispersion medium varies with frequency,the normal reflection coefficient approximate formula including P-velocity dispersion-dependent attribute is proposed,and the dispersion dependent attribute can be estimated from the inversion.By utilizing Bayesian three-parameter AVO inversion and wavelet decomposition, we can respectively obtain frequency-division seismic data and relative variation of density.Finally,P-wave velocity dispersion -dependent attribute can be estimated.The modeling and actual application results show that the P-velocity dispersion-dependent attribute is a good indicator for gas reservoir.
The application of frequency-dependent seismic attributes for reservoir characterization is always the research focus of geophysicists. It is noticed that the anomalously high attenuation and velocity dispersion is associated with hydrocarbon reservoirs and the attribute about velocity dispersion can be used to indicate the hydrocarbon reservoir.Based on the assumption that reflection coefficient on interface between dispersion medium varies with frequency,the normal reflection coefficient approximate formula including P-velocity dispersion-dependent attribute is proposed,and the dispersion dependent attribute can be estimated from the inversion.By utilizing Bayesian three-parameter AVO inversion and wavelet decomposition, we can respectively obtain frequency-division seismic data and relative variation of density.Finally,P-wave velocity dispersion -dependent attribute can be estimated.The modeling and actual application results show that the P-velocity dispersion-dependent attribute is a good indicator for gas reservoir.
引文
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[6]Ebrom D.The low-frequency gas shadow on seismic sections[J].The Leading Edge,2004,23(8):772
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[9]Liu E,Mark C,Li X Y.Applications of spectral decomposition for AVO analyses in the west of Sheland [J].Expanded Abstracts of 76~(th) Annual Internat SEG Mtg,2006,279-283
[10]Quan Y L,Harrisy J M.Seismic attenuation tomography using the frequency shift method[J].Geophysics, 1997,62(3):895-905
[11]李宏兵,赵文智,曹宏,等.小波尺度域含气储层地震波衰减特征[J].地球物理学报,2004,47(5): 892-898
[12]Batzle M R,Hofmann D H.Castagna J.Fluids and frequency dependent seismic velocity of rocks[J]. The Leading Edge,2001,20(2),168-171
[13]Carlos C,Han D H.Velocity dispersion estimation [J].Expanded Abstracts of 76~(th) Annual Internat SEG Mtg,2006,2309-2312
[14]Cooper H F.Reflection and transmission of oblique plane waves at a plane interface between viscoelastic media[J].Journal of the Acoustical Society of America, 1967,39(5):1133-1138
[15]Krebes E S.On the reflection and transmission of viscoelastic waves—Some numerical results[J].Geophysics, 1984,49(8):1374-1380
[16]Nechtschein S,Hron F.Effects of anelasticity on reflection and transmission coefficients[J].Geophysical Prospecting,1997,45(5):775-793
[17]Ursin B,Stovas A Reflection and transmission responses of a layered isotropic viscoelastic medium [J].Geophysics,2002,67(1):307-323
[18]Sidler R,Carcione J M Wave reflection at an anelastic transversely isotropic ocean bottom[J].Geophysics, 2007,72(5):SM139-SM146
[19]Chapman M E,Liu E,Li X.The influence of fluid-sensitive dispersion and attenuation on the AVO signature [J].The Leading Edge,2005,24(11):1120-1125
[20]Ren H T,Goloshubin G,Fred J.Hilterman Poroelastic analysis of amplitude-versus-frequency variations [J].Geophysics,2009,74(6):N41-N48
[21]Wilson A,Mark C,Li X Y.Frequency-dependent AVO inversion[J].Expanded Abstracts of 79~(th) Annual Internat SEG Mtg,2009,341-345
[22]Mallat S.A Wavelet tour of signal processing[M]. San Diego,USA:Academic Press,1999:79-84
[23]杨培杰,印兴耀.非线性二次规划贝叶斯叠前反演??[J].地球物理学报,2008,51(6):1876-1882
[24]Tarantola A.Inverse problem theory and methods for model parameter estimation[M].Philadelphia, USA:Society for Industrial and Applied Mathematics, 2004:20-40
[25]Downton J E,Lines L R.Constrained three parameter AVO inversion and uncertainty analysis[J].Expanded Abstracts of 71~(st) Annual Internat SEG Mtg, 2001:251-254
[2]Castagna J P,Sun S,Seigfried R W.Instantaneous spectral analysis:detection of low-frequency shadows associated with hydrocarbons[J].The Leading Edge,2003,22(2):120-127
[3]Chapman M E,Liu E,Li X.The influence of fluid-sensitive dispersion and attenuation on AVO analysis [J].Geophysical Journal International,2006,167 (1):89-105
[4]Goloshubin G M,Korneev V A.Seismic low-frequency effects from fluid-saturated reservoir[J].Expanded Abstracts of 70~(th) Annual Internat SEG Mtg, 2000,1671-1674
[5]Goloshubin G M,Korneev V A,Vingalov V M Seismic low-frequency effects from oil-saturated reservoir zones[J].Expanded Abstracts of 72~(nd) Annual Internat SEG Mtg,2002,1813-1816
[6]Ebrom D.The low-frequency gas shadow on seismic sections[J].The Leading Edge,2004,23(8):772
[7]陈学华,贺振华,文晓涛,等.低频阴影的数值模拟与检测[J].石油地球物理勘探,2009,44(3):298-303
[8]Chen G L,Chris F,Ramesh N,et al.Spectral decom- ??position response to reservoir fluids from a deepwater reservoir[J].Expanded Abstracts of 71~(st) Annual Internal SEG Mtg,2001,1665-1669
[9]Liu E,Mark C,Li X Y.Applications of spectral decomposition for AVO analyses in the west of Sheland [J].Expanded Abstracts of 76~(th) Annual Internat SEG Mtg,2006,279-283
[10]Quan Y L,Harrisy J M.Seismic attenuation tomography using the frequency shift method[J].Geophysics, 1997,62(3):895-905
[11]李宏兵,赵文智,曹宏,等.小波尺度域含气储层地震波衰减特征[J].地球物理学报,2004,47(5): 892-898
[12]Batzle M R,Hofmann D H.Castagna J.Fluids and frequency dependent seismic velocity of rocks[J]. The Leading Edge,2001,20(2),168-171
[13]Carlos C,Han D H.Velocity dispersion estimation [J].Expanded Abstracts of 76~(th) Annual Internat SEG Mtg,2006,2309-2312
[14]Cooper H F.Reflection and transmission of oblique plane waves at a plane interface between viscoelastic media[J].Journal of the Acoustical Society of America, 1967,39(5):1133-1138
[15]Krebes E S.On the reflection and transmission of viscoelastic waves—Some numerical results[J].Geophysics, 1984,49(8):1374-1380
[16]Nechtschein S,Hron F.Effects of anelasticity on reflection and transmission coefficients[J].Geophysical Prospecting,1997,45(5):775-793
[17]Ursin B,Stovas A Reflection and transmission responses of a layered isotropic viscoelastic medium [J].Geophysics,2002,67(1):307-323
[18]Sidler R,Carcione J M Wave reflection at an anelastic transversely isotropic ocean bottom[J].Geophysics, 2007,72(5):SM139-SM146
[19]Chapman M E,Liu E,Li X.The influence of fluid-sensitive dispersion and attenuation on the AVO signature [J].The Leading Edge,2005,24(11):1120-1125
[20]Ren H T,Goloshubin G,Fred J.Hilterman Poroelastic analysis of amplitude-versus-frequency variations [J].Geophysics,2009,74(6):N41-N48
[21]Wilson A,Mark C,Li X Y.Frequency-dependent AVO inversion[J].Expanded Abstracts of 79~(th) Annual Internat SEG Mtg,2009,341-345
[22]Mallat S.A Wavelet tour of signal processing[M]. San Diego,USA:Academic Press,1999:79-84
[23]杨培杰,印兴耀.非线性二次规划贝叶斯叠前反演??[J].地球物理学报,2008,51(6):1876-1882
[24]Tarantola A.Inverse problem theory and methods for model parameter estimation[M].Philadelphia, USA:Society for Industrial and Applied Mathematics, 2004:20-40
[25]Downton J E,Lines L R.Constrained three parameter AVO inversion and uncertainty analysis[J].Expanded Abstracts of 71~(st) Annual Internat SEG Mtg, 2001:251-254
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