三参量非线性AVO分析方法在苏里格气田的应用
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摘要
苏里格气田具有低孔、低渗、低丰度、低饱和度、低压等特点,其有效储层厚度变化大、连续性差、非均质性严重,常规AVO分析方法在该区难以有效区分孔隙流体。针对该问题,根据储层段岩石物理参数与测井资料,研究分析了AVO方法及含不同流体砂岩的AVO响应特征,设计了新的表征纵、横波速度和密度变化率特征的三参量非线性AVO分析方法。实际地震资料分析表明,利用三参量非线性AVO分析方法在苏里格气田取得了良好的应用效果,该方法精度高,能够较准确地预测流体。
Sulige Gas-field had the characteristics of low porosity,low permeability,low abundance,low saturation and low pressure,its effective reservoir thickness was greatly changed with poor continuity and serious heterogeneity,conventional AVO analysis method was difficult to be used for distinguishing pore fluid.In allusion to the problem stated above based on reservoir rock physical property and logging data,AVO method and AVO response features containing different sandstones were studied.A new characterization of p-wave and s-wav velocity and density variation characteristics of AVO analysis method was designed.The data analysis indicates that the method of three parameters AVO analysis based on nonlinear relation is used in Sulige Gas-field and good effect is achieved.
Sulige Gas-field had the characteristics of low porosity,low permeability,low abundance,low saturation and low pressure,its effective reservoir thickness was greatly changed with poor continuity and serious heterogeneity,conventional AVO analysis method was difficult to be used for distinguishing pore fluid.In allusion to the problem stated above based on reservoir rock physical property and logging data,AVO method and AVO response features containing different sandstones were studied.A new characterization of p-wave and s-wav velocity and density variation characteristics of AVO analysis method was designed.The data analysis indicates that the method of three parameters AVO analysis based on nonlinear relation is used in Sulige Gas-field and good effect is achieved.
引文
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[9]谢用良.川西丰谷地区三维AVO油气检测技术应用研究[J].天然气工业,2006,26(3):46～49.
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[14]Avseth P,Mukerji T,Jostad A.Seismic reservoir mapping from 3-D AVO in a North Sea turbidite system[J].Geophysics,2001,66(4):1157～1176.
[15]Barnes A E.Instantaneous frequency and amplitude at the envelope peak of a constant-phase wavelet[J].Geophysics,1991,56(7):1058～1060.
[2]鲍祥生,尹成,赵伟,等.储层预测的地震属性优选技术研究[J].石油物探,2006,45(1):28～33.
[3]董宁,周小鹰,刘振峰,等.鄂北上古生界隐蔽气藏地震储层预测技术[J].地球物理学进展,2006,21(3):909～916.
[4]李正文,胡光岷.P-SV波AVO分析[J].成都理工学院学报,1996,23(4):73～79.
[5]刘亚明.含气碳酸盐岩的AVO异常响应特征分析——以川东建南气田区为例[J].中国海上油气,2005,17(2):92～93.
[6]孙鹏远,孙建国,卢秀丽.P-SV波AVO分析[J].石油地球物理勘探,2003,38(2):131～135.
[7]王大兴,于波,高俊梅.高阻抗砂岩气藏的AVO分析[J].石油地球物理勘探,2001,36(3):301～307.
[8]王香文,于常青,董宁,等.储层综合预测技术在鄂尔多斯盆地定北区块的应用[J].地球物理学进展,2006,21(3):909～916.
[9]谢用良.川西丰谷地区三维AVO油气检测技术应用研究[J].天然气工业,2006,26(3):46～49.
[10]许多,李正文,李显贵,等.非均质气藏AVO反演及应用研究[J].矿物岩石,2001,21(1):86～90.
[11]郑晓东.Zoeppritz方程的近似及其应用[J].石油地球物理勘探,1991,26(2):129～144.
[12]Aki K,Richards P G.Quantitative seismology[M].New Jersey:University Science Books,2009.
[13]An P,Moon W M,Kalantzis F.Reservoir characterization using seismic waveform and feedforword neural networks[J].Geophys-ics,2001,66(5):1450～1456.
[14]Avseth P,Mukerji T,Jostad A.Seismic reservoir mapping from 3-D AVO in a North Sea turbidite system[J].Geophysics,2001,66(4):1157～1176.
[15]Barnes A E.Instantaneous frequency and amplitude at the envelope peak of a constant-phase wavelet[J].Geophysics,1991,56(7):1058～1060.
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