叠前分频AVO分析方法在罗家地区的应用研究
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摘要
传统AVO理论只考虑单界面两侧地层的岩石物理特征,没有考虑地层厚度、地震波衰减及速度频散问题。采用考虑了层厚及地震波主频影响的层状介质Brekhovski方程进行岩石物理正演,并将其作为AVO分析的理论指导;利用小波分频技术与AVO分析相结合,分析不同频带范围内目的层地震反射振幅的AVO梯度变化,以解决薄互层储层的AVO识别预测问题。通过在罗家地区的应用研究,总结出了叠前分频AVO分析方法的实用流程,有效预测了沙河街组一段生物灰岩薄互层储层的分布范围。
The traditional AVO theory only considers the petrophysical characteristics of strata on both sides of the single interface,without considering the layer thickness,seismic wave attenuation and velocity dispersion.Here,we utilize layered media Brekhovski equation for rock physical forward modeling which takes layer thickness and the impact of seismic wave domain-frequency into account,and regards it as the theoretical guide for AVO analysis.By combining wavelet frequenct-division technique with AVO analysis,we study the AVO gradient variation of reflection amplitude of seismic wave in different frequency band to solve the AVO identification and prediction problem for thin-interbedded reservoir.By the application in Luojia Area,we conclude a practical workflow of prestack frequency-division AVO analysis.Through adopting the workflow,the distribution of thin-interbedded Es1 Biolithite reservoir is effectively predicted.
The traditional AVO theory only considers the petrophysical characteristics of strata on both sides of the single interface,without considering the layer thickness,seismic wave attenuation and velocity dispersion.Here,we utilize layered media Brekhovski equation for rock physical forward modeling which takes layer thickness and the impact of seismic wave domain-frequency into account,and regards it as the theoretical guide for AVO analysis.By combining wavelet frequenct-division technique with AVO analysis,we study the AVO gradient variation of reflection amplitude of seismic wave in different frequency band to solve the AVO identification and prediction problem for thin-interbedded reservoir.By the application in Luojia Area,we conclude a practical workflow of prestack frequency-division AVO analysis.Through adopting the workflow,the distribution of thin-interbedded Es1 Biolithite reservoir is effectively predicted.
引文
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[9]程冰洁,徐天吉,李曙光.频变AVO含气性识别技术研究与应用[J].地球物理学报,2012,55(2):608-613Cheng B J,Xu T J,Li S G.Research and applicationof frequency dependent AVO analysis for gas recog-nition[J].Chinese Journal of Geophysics,2012,55(2):608-613
[10]Ren H,Goloshubin G,Hilterman F.Spectra cross-plot[J].The Leading Edge,2007,26(12):1562-1566
[11]汪恩华,贺振华,李庆忠.基于薄层的反射系数谱理论与模型正演[J].成都理工学院学报,2001,28(1):70-74Wang E H,He Z H,Li Q Z.Reflectance speatrumtheory and model computation based on thin beds[J].Journal of Chengdu University of Technology,2001,28(1):70-74
[12]任晓乔.小波分频信噪比加权叠加[D].大庆:大庆石油学院,2003Ren X Q.The signal-noise ratio weighted stack bywavelet division frequency[D].Daqing:NortheastPetroleum University,2003
[13]黄饶,陈小宏,李景叶.基于谱分解的气藏识别技术与应用[J].石油地球物理勘探,2010,45(1):35-39Huang R,Chen X H,Li J Y.Spectral decompositionbased gas reservoir identification technique and itsapplication[J].Oil Geophysical Prospecting,2010,45(1):35-39
[14]印海燕.AVO叠前反演方法研究[D].青岛:中国石油大学(华东),2008Yin H Y.The study on methods of AVO prestackinversion[D].Qingdao:China University of Petrole-um(East China),2008
[15]李艳玲.AVO叠前反演技术研究[J].大庆石油地质与开发,2006,25(5):103-106Li Y L.Study on AVO pre-stack inversion technolo-gy[J].Petroleum Geology&Oilfield Developmentin Daqing,2006,25(5):103-106
[2]陈小宏,田立新,黄饶.地震分频AVO方法研究现状与展望[J].海相油气地质,2009,14(4):60-66Chen X H,Tian L X,Huang R.Research progress-ing on frequency dependent AVO analysis[J].Ma-rine Origin Petroleum Geology,2009,14(4):60-66
[3]王建花.叠前弹性参数反演新方法[D].青岛:中国海洋大学,2006Wang J H.A new method on prestack elastic param-eters inversion[D].Qingdao:Ocean University ofChina,2006
[4]王建花,李庆忠,姜绍辉.基于“三明治”模型的薄层AVO分析[J].中国地球物理,2010,652-656Wang J H,Li Q Z,Jiang S H.AVO analysis in thin-beds based on the model of“Sandwich”[J].TheChinese Geophysics,2010,652-656
[5]刘凤,栾锡武.基于叠前分频的AVO分析在天然气水合物勘探中的应用[J].中国地球物理,2010,859-863Liu F,Luan X W.Application of frequency divisionAVO analysis in the exploration of gas hydrate[J].The Chinese Geophysics,2010,859-863
[6]刘凤.基于叠前分频的AVO分析在天然气水合物识别中的应用[D].北京:中国科学院,2011Liu F.Application of frequency division AVO analy-sis in the recognition of gas hydrate[D].Beijing:Chinese Academy of Sciences,2011
[7]张延章,尹寿鹏,张巧玲,等.地震分频技术的地质内涵及其效果分析[J].石油勘探与开发,2006,33(1):64-66Zhang Y Z,Yin S P,Zhang Q L,et al.Geologic sig-nificance of the seismic spectral decomposition tech-nology and its application analysis[J].PetroleumExploration and Development,2006,33(1):64-66
[8]轩义华,秦成岗,汪瑞良,等.分频AVO技术在珠江口盆地番禹天然气区含气性分析中的应用[J].石油地球物理勘探,2010,45(1):79-84Xuan Y H,Qin C G,Wang R L,et al.Application offrequency division AVO technique in gas bearing a-nalysis in Fanyu natural gas area,Pearl River MouthBasin[J].Oil Geophysical Prospecting,2010,45(1):79-84
[9]程冰洁,徐天吉,李曙光.频变AVO含气性识别技术研究与应用[J].地球物理学报,2012,55(2):608-613Cheng B J,Xu T J,Li S G.Research and applicationof frequency dependent AVO analysis for gas recog-nition[J].Chinese Journal of Geophysics,2012,55(2):608-613
[10]Ren H,Goloshubin G,Hilterman F.Spectra cross-plot[J].The Leading Edge,2007,26(12):1562-1566
[11]汪恩华,贺振华,李庆忠.基于薄层的反射系数谱理论与模型正演[J].成都理工学院学报,2001,28(1):70-74Wang E H,He Z H,Li Q Z.Reflectance speatrumtheory and model computation based on thin beds[J].Journal of Chengdu University of Technology,2001,28(1):70-74
[12]任晓乔.小波分频信噪比加权叠加[D].大庆:大庆石油学院,2003Ren X Q.The signal-noise ratio weighted stack bywavelet division frequency[D].Daqing:NortheastPetroleum University,2003
[13]黄饶,陈小宏,李景叶.基于谱分解的气藏识别技术与应用[J].石油地球物理勘探,2010,45(1):35-39Huang R,Chen X H,Li J Y.Spectral decompositionbased gas reservoir identification technique and itsapplication[J].Oil Geophysical Prospecting,2010,45(1):35-39
[14]印海燕.AVO叠前反演方法研究[D].青岛:中国石油大学(华东),2008Yin H Y.The study on methods of AVO prestackinversion[D].Qingdao:China University of Petrole-um(East China),2008
[15]李艳玲.AVO叠前反演技术研究[J].大庆石油地质与开发,2006,25(5):103-106Li Y L.Study on AVO pre-stack inversion technolo-gy[J].Petroleum Geology&Oilfield Developmentin Daqing,2006,25(5):103-106
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