两项式弹性波阻抗反演方法在深层碳酸盐岩储层预测中的应用
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摘要
川东北地区长兴组碳酸盐岩储层埋藏深度大,获取大角度地震信息困难,地震资料信噪比较低。为此,本文通过引入新的近似式,从中、小角度两个弹性阻抗数据体中提取岩石物性参数。文中首先以佐普里兹方程的Aki-Richards近似式为基础,详细推导了以纵横波阻抗表示的新的两项型弹性波阻抗公式,该式不仅考虑了密度与其他地球物理参数的联系,而且在舍弃密度项时,利用纵波速度与密度幂指数拟合关系式使密度近似为纵波阻抗更加合理;其次引入Tikhonov正则化方法以提高该方法反演的精度、稳定性和抗噪性。数值试算与实际应用结果都证明了该方法的可行性。
Changxing formation carbonate reservoirs are deeply buried in the Northeastern Sichuan Basin.Seismic data with large angle is hardly acquired,and data signal-to-noise ratio is very low.In order to meet these challenges,by introducing a new approximate formula,a method to pick up petro-physical parameters from two elastic impedance data volumes with middle and small angles is proposed in the paper.Based on Aki-Richards approximation formula of Zoeppritz's equation,the new two-term elastic wave impedance formula expressed by compressional wave impedance and shear wave impedance is derived.In the discarded density item,the density approaches to compressional wave impedance by using compressional wave velocity and density of exponential fitting.On the other hand,the accuracy,stability,noise immunity of the inversion is improved by the Tikhonov regularization method.Numerical experiments and seismic data applications prove the feasibility of this method.
引文
[1]贺振华,贾义蓉,蒋炼等.碳酸盐岩礁滩油气储层地震预测方法探讨.物探化探计算技术,2011,33(1):1~5He Zhenhua,Jia Yirong,Jiang Lian et al.Research onthe methodology of carbonate reef-shoal reservoir de-scription by 3Dseismic data.Computing Techniquesfor Geophysical and Geochemical Exploration,2011,33(1):1~5
    [2]Connolly P.Elastic impedance.The Leading Edge,1999,18(4):438~452
    [3]Whitcombe D N.Elastic impedance normalization.Geophysics,2002,67(1):60~62
    [4]王保丽,印兴耀,张繁昌.基于Gray近似的弹性波阻抗方程及反演.石油地球物理勘探,2007,42(4):435~439Wang Baoli,Yin Xingyao,Zhang Fanchang.Gray ap-proximation-based elastic wave impedance equationand inversion.OGP,2007,42(4):435~439
    [5]甘利灯,赵邦六,杜文辉等.弹性阻抗在岩性与流体预测中的潜力分析.石油物探,2005,44(5):504~Gan Lideng,Zhao Bangliu,Du Wenhui et al.The po-tential analysis of elastic impedance in the lithologyand fluid prediction.GPP,2005,44(5):504~508
    [6]Aki K I and Richards P G.Quantitative Seismology.W H Freeman and Co,1980
    [7]Mallick S,Huang X,Lauve J et al.Hybrid seismic in-version:a reconnaissance tool for deep water explora-tion.The Leading Edge,2000,19(11):1230~1237
    [8]Mallick et al.Hybrid seismic inversion:A reconnais-sance exploration tool.SEG Technical Program Ex-panded Abstracts,1999,18
    [9]Mallick S.AVO and elastic impedance.The LeadingEdge,2001,20(10):1094~1104
    [10]Ursenbach C.Two new approximations for AVO in-version:National Convention.Canadian Society ofExploration Geophysicists,Expanded Abstracts,2004
    [11]Gardner G H F,Gardner L W and Gregory A R.For-mation velocity and density-The diagnostic basis forstratigraphic traps.Geophysics,1974,39(6):777~780
    [12]Lu Shaoming and McMechan G A.Elastic impedanceinversion of multichannel seismic data from unconsoli-dated sediments containing gas hydrate and free gas.Geophysics,2004,69(1):164~179
    [13]李爱山,印兴耀,陆娜等.两个角度弹性阻抗反演在中深层含气储层预测中的应用.石油地球物理勘探,2009,44(1):87~92Li Aishan,Yin Xingyao,Lu Na et al.Application ofelastic impedance inversion with two angle stack gath-ers to predict gas-bearing reservoir of mid-deep layer.OGP,2009,44(1):87~92
    [14]王保丽,印兴耀,张繁昌等.基于Fatti近似的弹性阻抗方程及反演.地球物理学进展,2008,23(1):192~197Wang Baoli,Yin Xingyao,Zhang Fanchang et al.E-lastic impedance equation based on Fatti approxima-tion and inversion.Progress in Geophysics,2008,23(1):192~197
    [15]Fatti J L,Smith P J et al.Detection of gas in sand-stone reservoirs using AVO analysis:A 3-D seismiccase history using the geostack technique.Geophy-sics,1994,59(9):1362~1376
    [16]Smith G C and Gidlow P M.Weighted stacking forrock property estimation and detection of gas.Geo-physical Prospecting,1987,35(3):993~1014
    [17]朱广生,桂志先,熊新斌等.密度与纵横波速度关系.地球物理学报,1995,38(1):260~264Zhu Guangsheng,Gui Zhixian,Xiong Xinbin et al.Relationships between density and p-wave,s-wave ve-locities.Chinese Journal of Geophysics,1995,38(1):260~264
    [18]Tikhonov A N.Solution of incorrectly formulatedproblems and the regularization method.SovietMathematical Doklady,1963,4(3):1035~1038
    [19]陈小斌,赵国泽等.大地电磁自适应正则化反演算法.地球物理学报,2005,48(4):937~945Chen Xiaobin,Zhao Guoze et al.An adaptive regular-ized inversion algorithm for magnetotelluric data.Chinese Journal of Geophysics,2005,48(4):937~945
    [20]黄小为,吴传生,朱华平.基于奇异值分解建立的一种新的正则化方法.数学物理学报,2005,25A(3):331~336Huang Xiaowei,Wu Chuansheng,Zhu Huaping.Anew regularization method based on the singular valuedecomposition for compact operators.Acta Mathema-tiea Scientia,2005,25A(3):331~336
    [21]刘小军,王家林,陈冰等.二维大地电磁数据的聚焦反演算法探讨.石油地球物理勘探,2007,42(3):338~342Liu Xiaojun,Wang Jialin,Chen Bing et al.Discussionon focus inversion algorithm of 2-D MT data.OGP,2007,42(3):338~342
    [22]刘国昌,陈小宏,杜婧等.基于整形正则化和S变换的Q值估计方法.石油地球物理勘探,2011,46(3):417~422Liu Guochang,Chen Xiaohong,Du Jing et al.SeismicQ estimation using S-transform with regularized in-version.OGP,2011,46(3):417~422
    [23]宁忠华,贺振华,黄德济.基于地震资料的高灵敏度流体因子.石油物探,2006,45(3):239~242Ning Zhonghua,He Zhenhua,Huang Deji.High sen-sitive fluid identification based on seismic data.GPP,2006,45(3):239~242

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