地震波阻抗反演实验分析
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摘要
本文使用实际测井数据和地震层位建立一个二维波阻抗实验模型,利用褶积算法生成合成地震记录,再对合成地震记录分别进行测井约束波阻抗反演和稀疏脉冲波阻抗反演,并以地震数据的最高有效频率为截频点,将反演结果分为高频分量和低频分量,分别对其可靠性及其影响因素进行分析,在此基础上进行测井约束和稀疏脉冲联合波阻抗反演。实验结果表明:①测井约束反演方法能够可靠地反演出实际波阻抗的低频分量,而反演结果的高频分量主要来自于初始波阻抗模型;②稀疏脉冲反演方法能够产生地震资料有效频带之外的频率成分,但并不能保证反演结果低频分量的可靠性;③测井约束波阻抗反演与稀疏脉冲反演之间具有很强的互补性,联合应用两种方法能够改善反演结果的可靠性。
Based on field well logging data and seismic horizons a 2d impedance experimental model was established in this paper,convolution algorithm was used to generate synthetic seismic record,then for the record the well logging constraint impedance inversion and the sparse impulse impedance inversion were conducted respectively,by taking the maximum effective frequency of the seismic data as cut-off frequency,the inversion results were divided into high frequency component and low frequency component,after analyzing their reliability and influencing factors,a joint inversion of well logging constraint impedance inversion and the sparse impulse impedance inversion was conducted,the experimental results show the following conclusions:(1):by using well logging constraint inversion method the low frequency component of the impedance can be accurately inverted,while the high frequency component of the inversion result was mainly from the initial impedance model,(2):The sparse impulse inversion method could generate the frequency component which is not within the effective frequency bandwidth of seismic data,but it could assure the reliability of the low frequency component of the inversion results.(3):The well logging constraint impedance inversion and the sparse impulse impedance inversion have strong complementarity,jointly applying of the two inversion methods could improve the reliability of the inversion results.
Based on field well logging data and seismic horizons a 2d impedance experimental model was established in this paper,convolution algorithm was used to generate synthetic seismic record,then for the record the well logging constraint impedance inversion and the sparse impulse impedance inversion were conducted respectively,by taking the maximum effective frequency of the seismic data as cut-off frequency,the inversion results were divided into high frequency component and low frequency component,after analyzing their reliability and influencing factors,a joint inversion of well logging constraint impedance inversion and the sparse impulse impedance inversion was conducted,the experimental results show the following conclusions:(1):by using well logging constraint inversion method the low frequency component of the impedance can be accurately inverted,while the high frequency component of the inversion result was mainly from the initial impedance model,(2):The sparse impulse inversion method could generate the frequency component which is not within the effective frequency bandwidth of seismic data,but it could assure the reliability of the low frequency component of the inversion results.(3):The well logging constraint impedance inversion and the sparse impulse impedance inversion have strong complementarity,jointly applying of the two inversion methods could improve the reliability of the inversion results.
引文
[1]Li Guofa,Xiong Jinliang,Zhou Hui.Seismic reflec-tion characteristics of fluvial sand and shale interbed-ded layers.Applied Geophysics,2008,(3):219～229
[2]李庆忠.论地震约束反演的策略.石油地球物理勘探,1998,33(4):423～438
[3]马劲风,王学军,贾春环等.波阻抗约束反演中的约束方法研究.石油物探,2000,39(2):52～63
[4]姚逢昌,甘利灯.地震反演的应用与限制.石油勘探与开发,2000,27(2):53～56
[5]陈广军,段智斌,马在田.关于“波阻抗反演热”的讨论.油气地球物理,2003,1(3):7～10
[6]张明振,印兴耀,谭明友等.对测井约束地震波阻抗反演的理解与应用.石油地球物理勘探,2007,42(6):699～702
[7]Francis A.Acoustic impedance inversion pitfalls and some fuzzy analysis.The Leading Edge,1997,16(3):275～283
[8]Juve E.Uncertainties relating to impedance layering derived from post-stack stratigraphic inversion.SEG Technical Program Expanded Abstracts,1997,16:1606～1609
[9]Ghost S k.Limitations on impedance inversion of band-limited reflection data.Geophysics,2000,65(3):951～957
[10]Cerney B.Uncertainties inlow-frequency acoustic im-pedance models.The Leading Edge,2007,26(1):74～86
[11]Latimer R B.Aninterpreter’s guide to understanding and working with seismic-derived acoustic impedance data.The Leading Edge,2000,19(3):242～256
[12]Li Guofa,Zhou Hui,Zhao Chao.Potential risks of spectrum whitening deconvolution-compared with well-driven deconvolution.PetroleumScience,2009,6(2):146～152
[13]聂凯轩,陆正元,冯斌.测井约束反演技术在LZ21-4构造带储盖层综合分析中的应用.石油地球物理勘探,2007,42(1):98～101
[14]刘成斋,冉建斌,杨永生.稀疏脉冲和基于模型反演在王家岗沙四段砂岩油藏精细勘探中的应用.石油地球物理勘探,2002,37(4):401～406
[15]王宇,韩立国,周家熊等.L1-L2范数联合约束稀疏脉冲反演的应用.地质科学,2009,34(5):835～840
[2]李庆忠.论地震约束反演的策略.石油地球物理勘探,1998,33(4):423～438
[3]马劲风,王学军,贾春环等.波阻抗约束反演中的约束方法研究.石油物探,2000,39(2):52～63
[4]姚逢昌,甘利灯.地震反演的应用与限制.石油勘探与开发,2000,27(2):53～56
[5]陈广军,段智斌,马在田.关于“波阻抗反演热”的讨论.油气地球物理,2003,1(3):7～10
[6]张明振,印兴耀,谭明友等.对测井约束地震波阻抗反演的理解与应用.石油地球物理勘探,2007,42(6):699～702
[7]Francis A.Acoustic impedance inversion pitfalls and some fuzzy analysis.The Leading Edge,1997,16(3):275～283
[8]Juve E.Uncertainties relating to impedance layering derived from post-stack stratigraphic inversion.SEG Technical Program Expanded Abstracts,1997,16:1606～1609
[9]Ghost S k.Limitations on impedance inversion of band-limited reflection data.Geophysics,2000,65(3):951～957
[10]Cerney B.Uncertainties inlow-frequency acoustic im-pedance models.The Leading Edge,2007,26(1):74～86
[11]Latimer R B.Aninterpreter’s guide to understanding and working with seismic-derived acoustic impedance data.The Leading Edge,2000,19(3):242～256
[12]Li Guofa,Zhou Hui,Zhao Chao.Potential risks of spectrum whitening deconvolution-compared with well-driven deconvolution.PetroleumScience,2009,6(2):146～152
[13]聂凯轩,陆正元,冯斌.测井约束反演技术在LZ21-4构造带储盖层综合分析中的应用.石油地球物理勘探,2007,42(1):98～101
[14]刘成斋,冉建斌,杨永生.稀疏脉冲和基于模型反演在王家岗沙四段砂岩油藏精细勘探中的应用.石油地球物理勘探,2002,37(4):401～406
[15]王宇,韩立国,周家熊等.L1-L2范数联合约束稀疏脉冲反演的应用.地质科学,2009,34(5):835～840
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