基于AVO流体反演的储层孔隙度预测技术
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摘要
AVO流体反演技术是将统计学与AVO理论结合,统计判别实际地震数据与测井数据正演的AVO响应,定量预测目标储层的含油气概率分布。针对低孔、低渗碎屑岩储层,为求取孔隙度参数,本文将AVO流体反演技术进行了改进,充分利用其统计学分析优势,通过贝叶斯和柯西等概率理论对异常信息进行统计判别,并从中提取出储层的孔隙度信息,实现了X69井区储层的定量预测,减小了预测的多解性。孔隙度预测结果与实际测井值吻合率最高可达到79%,较好刻画出高产井区有效储层空间分布特征。
AVO fluid inversion is a program which combines AVO theory with statistics,discriminates the AVO response between actual seismic data and log data,and predict quantificationally the probability of hydrocarbon in reservoirs.To obtain the quantificational porosity prediction of low-porosity and low-permeability reservoirs at target area,we present in this paper an improvement of AVO fluid inversion to make full use of its advantages in statistical analysis with probability theory such as Bayes' theorem and Cauchy distribution,to distinguish anomaly information and extract effective information about reservoir porosity.The prediction results in X69 area show that 79% of the prediction fit to the calculated values of logging data,and the distribution of effective reservoirs in high productivity area is accurately delineated.
AVO fluid inversion is a program which combines AVO theory with statistics,discriminates the AVO response between actual seismic data and log data,and predict quantificationally the probability of hydrocarbon in reservoirs.To obtain the quantificational porosity prediction of low-porosity and low-permeability reservoirs at target area,we present in this paper an improvement of AVO fluid inversion to make full use of its advantages in statistical analysis with probability theory such as Bayes' theorem and Cauchy distribution,to distinguish anomaly information and extract effective information about reservoir porosity.The prediction results in X69 area show that 79% of the prediction fit to the calculated values of logging data,and the distribution of effective reservoirs in high productivity area is accurately delineated.
引文
[1]陈遵德,朱广生.地震储层预测方法研究进展.地球物理学进展,1997,12(4):76～82Chen Zunde,Zhu Guangsheng.Research progress onthe method of seismic reservoir prediction.Progressin Geophysics,1997,12(4):76～82
[2]张凌,白建峰.地震资料预测孔隙度的方法与分析.科技信息,2007,(18):277
[3]肖冬生.AFI技术原理及应用.内蒙古石油化工,2009,(12):101～103Xiao Dongsheng.The theory and application of AFItechnology.Inner Mongolia Petrochemical Indus-try,2009,(12):101～103
[4]高建荣,滕吉文,李明,张云绵.AVO流体反演理论与实践.石油勘探与开发,2006,33(5):558～561Gao Jianrong,Teng Jiwen,Li Ming,Zhang Yunmi-an.AVO fluid inversion:theory and practice.Petrole-um Expoloration and Development,2006,33(5):558～561
[5]高建荣,胡宇芳,王延.基于AVO的属性分析.物探化探计算技术,2007,29(4):303～306Gao Jianrong,Hu Yufang,Wang Yan.AVO attributeanalysis.Computing Techniques for Geophysicaland Geochemical Exploration,2007,29(4):303～306
[6]史松群,张盟勃.流体成分反演技术在盒8储层流体检测中的应用.低渗透油气田,2007,12(1):40～43Shi Songqun,Zhang Mengbo.Application of fluidcomponents inversion technique to He8reservoir fluiddetection.Low Permeability Oil-Gas Fields,2007,12(1):40～43
[7]轩义华,袁立忠,汪瑞良等.基于统计岩石物理学的流体成分反演应用实例研究.天然气地球科学,2010,21(5):839～843Xuan Yihua,Yuan Lizhong,Wang Ruiliang et al.Re-alization and application of AVO fluid inversion basedon statistical petrophysics.Natural Gas Geoscience,2010,21(5):839～843
[8]梁立锋,冯全雄,万欢等.AVO流体反演技术在惠州某区的应用.工程地球物理学报,2010,7(5):548～553Liang Lifeng,Feng Quanxiong,Wan Huan et al.Application of AVO fluid inversion technology in anarea of Huizhou.Chinese Journal of EngineeringGeophysics,2010,7(5):548～553
[9]Alemie W,Sacchi M D.High-resolution three-termAVO inversion by means of a trivariate Cauchy prob-ability distribution.Geophysics,2011,76(3):43～55
[10]Alemie W.Regularization of the AVO Inverse Prob-lem by Means of a Multivariate Cauchy ProbabilityDistribution,University of Alberta(Canada),2010
[11]张巧凤,王余庆,王天琦.松辽盆地薄互层河道砂岩地震预测技术.岩性油气藏,2007,19(1):92～95Zhang Qiaofeng,Wang Yuqing,Wang Tianqi.Seis-mic prediction technique of thin interbed channel sandin SongLiao Basin.Lithologic Reservoirs,2007,19(1):92～95
[12]Fred J Hilterman著,孙夕平,赵良武等译.地震振幅解释.北京:石油工业出版社,2006
[2]张凌,白建峰.地震资料预测孔隙度的方法与分析.科技信息,2007,(18):277
[3]肖冬生.AFI技术原理及应用.内蒙古石油化工,2009,(12):101～103Xiao Dongsheng.The theory and application of AFItechnology.Inner Mongolia Petrochemical Indus-try,2009,(12):101～103
[4]高建荣,滕吉文,李明,张云绵.AVO流体反演理论与实践.石油勘探与开发,2006,33(5):558～561Gao Jianrong,Teng Jiwen,Li Ming,Zhang Yunmi-an.AVO fluid inversion:theory and practice.Petrole-um Expoloration and Development,2006,33(5):558～561
[5]高建荣,胡宇芳,王延.基于AVO的属性分析.物探化探计算技术,2007,29(4):303～306Gao Jianrong,Hu Yufang,Wang Yan.AVO attributeanalysis.Computing Techniques for Geophysicaland Geochemical Exploration,2007,29(4):303～306
[6]史松群,张盟勃.流体成分反演技术在盒8储层流体检测中的应用.低渗透油气田,2007,12(1):40～43Shi Songqun,Zhang Mengbo.Application of fluidcomponents inversion technique to He8reservoir fluiddetection.Low Permeability Oil-Gas Fields,2007,12(1):40～43
[7]轩义华,袁立忠,汪瑞良等.基于统计岩石物理学的流体成分反演应用实例研究.天然气地球科学,2010,21(5):839～843Xuan Yihua,Yuan Lizhong,Wang Ruiliang et al.Re-alization and application of AVO fluid inversion basedon statistical petrophysics.Natural Gas Geoscience,2010,21(5):839～843
[8]梁立锋,冯全雄,万欢等.AVO流体反演技术在惠州某区的应用.工程地球物理学报,2010,7(5):548～553Liang Lifeng,Feng Quanxiong,Wan Huan et al.Application of AVO fluid inversion technology in anarea of Huizhou.Chinese Journal of EngineeringGeophysics,2010,7(5):548～553
[9]Alemie W,Sacchi M D.High-resolution three-termAVO inversion by means of a trivariate Cauchy prob-ability distribution.Geophysics,2011,76(3):43～55
[10]Alemie W.Regularization of the AVO Inverse Prob-lem by Means of a Multivariate Cauchy ProbabilityDistribution,University of Alberta(Canada),2010
[11]张巧凤,王余庆,王天琦.松辽盆地薄互层河道砂岩地震预测技术.岩性油气藏,2007,19(1):92～95Zhang Qiaofeng,Wang Yuqing,Wang Tianqi.Seis-mic prediction technique of thin interbed channel sandin SongLiao Basin.Lithologic Reservoirs,2007,19(1):92～95
[12]Fred J Hilterman著,孙夕平,赵良武等译.地震振幅解释.北京:石油工业出版社,2006
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