随机介质模型的改进方法及应用
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摘要
为了更好地刻画火山岩等复杂岩性油气藏的特征,并结合这种实际地层的非均匀特性及实际地震记录自相关函数的特点,提出了根据随机过程的谱分解理论构造随机介质模型的一种改进形式的混合型自相关函数,增加了周期因子,并给出定量评价随机介质局部扰动大小的两种尺度因子,该随机介质模型能够更加灵活、准确地描述随机介质。通过改变自相关长度、周期因子、均值、方差、模糊度因子5个统计量,就可制作出不同尺度下不同形式的混合型随机空隙介质模型,与此同时根据实际地震记录制作了火山岩等非均匀介质模型,进行波场分析。模拟结果显示,该介质模型能够更加灵活、方便地描述实际介质,能够有效地模拟复杂非均匀介质细节的特点。
In order to depict the characteristics of complex lithologic hydrocarbon reservoir of volcanic rock and combined with this heterogenetic identity of practical stratum and auto-correlation functions of practical seismic record,we put forward improved intermixed auto-correlation functions according to theory of spectral factorization in stochastic process,which is added with periodic factor,and presented two kinds of scaling factor to quantitatively evaluate the magnitude of local disturbance.This random medium may describe the realistic media more agilely and precisely.By changing five statistics: the autocorrelation width,periodic factor,average value,variance and ambiguity,you can create different kinds of random interstitial medium in different scale,at the same time,we make up heterogenetic model of volcanic rock according to practical seismic record and use wave modeling analysis.The results show that it can depict random medium more neatly and expediently,and more effectively simulate details of the complex heterogeneous medium.
In order to depict the characteristics of complex lithologic hydrocarbon reservoir of volcanic rock and combined with this heterogenetic identity of practical stratum and auto-correlation functions of practical seismic record,we put forward improved intermixed auto-correlation functions according to theory of spectral factorization in stochastic process,which is added with periodic factor,and presented two kinds of scaling factor to quantitatively evaluate the magnitude of local disturbance.This random medium may describe the realistic media more agilely and precisely.By changing five statistics: the autocorrelation width,periodic factor,average value,variance and ambiguity,you can create different kinds of random interstitial medium in different scale,at the same time,we make up heterogenetic model of volcanic rock according to practical seismic record and use wave modeling analysis.The results show that it can depict random medium more neatly and expediently,and more effectively simulate details of the complex heterogeneous medium.
引文
[1]Korn M.Seismic wave in random media[J].Applied Geophys-ics.1993,29:247-269.
[2]Kneib G,Shapiro S.Viscoacoustic wave propagation in 2D randommedia and separation of absorption and scattering attenuation[J].Ge-ophysics,1995,60(2):451-456.
[3]Shapiro S,Schwarz R,Gold N.The effect of random isotropic inhomo-geneities on the phase velocity of seismic waves[J].GeophysicalJournal International,1996,127:783-794.
[4]Ikelle L,Yung S,Daube F.2-D random media with ellipsoidal auto-correlation function[J].Geophysics,1993,58(9):1359-1372.
[5]奚先,姚姚.随机介质模型的模拟与混合型随机介质[J].地球科学——中国地质大学学报,2002,27(1):57-67.
[6]姚姚,奚先.随机介质模型正演模拟及其地震波场分析[J].石油物探,2002,41(1):31-36.
[7]奚先,姚姚.二维随机介质及波动方程正演模拟[J].石油地球物理勘探,2001,36(5):546-552.
[8]奚先,姚姚,顾汉民.随机溶洞介质模型的构造[J].华中科技大学学报(自然科学版),2005,33(9):105-108.
[9]奚先,姚姚.二维弹性随机介质中的波场特征[J].地球物理学进展,2005,20(1):147-154.
[10]奚先,姚姚.非平稳随机介质模型[J].石油地球物理勘探,2005,40(1):71-75.
[11]李来林,吴清岭.叠前深度成像技术及其应用[J].大庆石油地质与开发,2004,23(5):113-129.
[12]姜岩,李纲,刘文岭.基于地震解释成果的地质建模技术及应用[J],大庆石油地质与开发,2004,23(5):118-129.
[2]Kneib G,Shapiro S.Viscoacoustic wave propagation in 2D randommedia and separation of absorption and scattering attenuation[J].Ge-ophysics,1995,60(2):451-456.
[3]Shapiro S,Schwarz R,Gold N.The effect of random isotropic inhomo-geneities on the phase velocity of seismic waves[J].GeophysicalJournal International,1996,127:783-794.
[4]Ikelle L,Yung S,Daube F.2-D random media with ellipsoidal auto-correlation function[J].Geophysics,1993,58(9):1359-1372.
[5]奚先,姚姚.随机介质模型的模拟与混合型随机介质[J].地球科学——中国地质大学学报,2002,27(1):57-67.
[6]姚姚,奚先.随机介质模型正演模拟及其地震波场分析[J].石油物探,2002,41(1):31-36.
[7]奚先,姚姚.二维随机介质及波动方程正演模拟[J].石油地球物理勘探,2001,36(5):546-552.
[8]奚先,姚姚,顾汉民.随机溶洞介质模型的构造[J].华中科技大学学报(自然科学版),2005,33(9):105-108.
[9]奚先,姚姚.二维弹性随机介质中的波场特征[J].地球物理学进展,2005,20(1):147-154.
[10]奚先,姚姚.非平稳随机介质模型[J].石油地球物理勘探,2005,40(1):71-75.
[11]李来林,吴清岭.叠前深度成像技术及其应用[J].大庆石油地质与开发,2004,23(5):113-129.
[12]姜岩,李纲,刘文岭.基于地震解释成果的地质建模技术及应用[J],大庆石油地质与开发,2004,23(5):118-129.
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