叠前同时反演方法在流体识别中的应用
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摘要
基于多角度道集和多尺度信息约束的叠前同时反演方法是利用多个角度的叠加数据体,将叠后波阻抗和叠前AVO属性整合到反演流程中,并将地震、测井、地质(包括构造倾角)等多尺度信息作为软约束条件参与反演的方法。应用迭代算法,同时反演出与岩性和含油气性相关的纵波阻抗、横波阻抗和密度等多种弹性参数,综合判别储层物性和含油气性,降低单纯利用纵波弹性阻抗反演的非唯一性,增强反演结果的稳定性和可靠性。综合利用颜色编码交会分析和三维可视化技术对众多叠前同时反演属性三维数据体在剖面和空间上进行解释,提高了对弹性反演属性的解释能力。将该反演方法和技术思路应用于新疆某油田M地区,优选Xu-White模型估算S波时差曲线,对4个不同角度的叠加数据体进行了叠前同时反演,使用AVO颜色编码交会分析技术预测了工区中砂岩和含油气性分布。结果表明,利用该方法能有效识别储层和流体。
Prestack simultaneous inversion is based on multi-angle gathers and multi-scale data confining,by using the stack data volumes from multi angles,integrating poststack wave impedance and prestack AVO attributes into inversion workflow,and taking multi- scale information(such as seismic,geologic and logging data) as soft restraint condition,through iteration,to simultaneously inverse many elastic parameters(P-wave impedance,S-wave impedance and density),eventually discriminate reservoir properties and hydrocarbon bearing.The method decreases the multiplicity of inversion only by P-wave elastic impedance,strengthens the stability and reliability of inversion result.Color coding cross-plot and 3D visualization were comprehensively applied to interpret the 3D data volumes from prestack simultaneous inversion,which improves the interpretation capability for elastic inversed attributes.The technique and workflow were applied in M area.Xu-White modeling was optimized to estimate S-wave moveout,and carry out prestack simultaneous inversion on four stack data volumes with different angles, combined with AVO color coding cross-plot,the distribution of sandstone and hydrocarbon bearing were predicted,the result shows that the method can be used to effectively identify reservoir and fluid.
Prestack simultaneous inversion is based on multi-angle gathers and multi-scale data confining,by using the stack data volumes from multi angles,integrating poststack wave impedance and prestack AVO attributes into inversion workflow,and taking multi- scale information(such as seismic,geologic and logging data) as soft restraint condition,through iteration,to simultaneously inverse many elastic parameters(P-wave impedance,S-wave impedance and density),eventually discriminate reservoir properties and hydrocarbon bearing.The method decreases the multiplicity of inversion only by P-wave elastic impedance,strengthens the stability and reliability of inversion result.Color coding cross-plot and 3D visualization were comprehensively applied to interpret the 3D data volumes from prestack simultaneous inversion,which improves the interpretation capability for elastic inversed attributes.The technique and workflow were applied in M area.Xu-White modeling was optimized to estimate S-wave moveout,and carry out prestack simultaneous inversion on four stack data volumes with different angles, combined with AVO color coding cross-plot,the distribution of sandstone and hydrocarbon bearing were predicted,the result shows that the method can be used to effectively identify reservoir and fluid.
引文
[1]张永刚.地震波阻抗反演技术的现状和发展[J].石油物探,2002,41(4):386-389
[2]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[J].石油物探,2005,44(5): 504-508
[3]苑书金,董宁,于常青.叠前联合反演P波阻抗和S波阻抗的研究及应用[J].石油地球物理勘探,2005, 40(3):339-342
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[8]Foster D J,Keys R G,Reilly J M.Another perspec-tive on AVO crossplotting[J].The Leading Edge, 1997,16(9):1233-1239
[9]Keho T H.The AVO hodogram:using polarization to identify anomalies[J].Expanded Abstracts of 70~(th) Annual Internat SEG Mtg,2000,118-121
[10]Fu L Y.Joint inversions of seismic data for acoustic impedance[J].Geophysics,2004,69(4):994-1004
[11]Caianiello E R.Outline of a theory of thought-processes and thinking machines[J].Journal of Theoretical Biology,1961,1(2):204-235
[12]孟宪军,慎国强,王玉梅,等.叠前AVA地震纵横波阻抗同步反演技术研究[J].石油物探,2004,43(增刊):53-55
[13]崔炯成,吴媚,李维新,等.高分辨率非线性地震波阻抗反演方法和应用[J].石油物探,2007,46(1):1-12
[14]李爱山,印兴耀,张繁昌,等.叠前多参数同步反演技术在含气储层预测中的应用[J].石油物探,2007,46 (1):64-68
[15]苑书金.叠前地震反演技术的进展及其在岩性油气藏勘探中的应用[J].地球物理学进展,2007,22(3): 879-886
[16]唐晓花,成德安,吕金龙.叠前同步反演在徐家围子断陷火山岩气藏预测中的应用[J].石油物探,2009, 48(3):285-289
[17]Tonellot T,Mace D,Richard V.Joint stratigraphic inversion of angle limited stacks[J].Expanded Abstracts of 71~(st) Annual Internat SEG Mtg,2001, 227-230
[18]Tonellot T,Mace D,Richard V.3D quantitative AVA:joint versus sequential stratigraphic inversion of angle-limited stacks[J].Expanded Abstracts of 72~(nd) Annual Internat SEG Mtg,2002,253-256
[19]Castagna J P,Batzle M L,Eastwood R L.Relation-ships between compressional wave and shear wave velocities in clastic silicate rocks[J].Geophysics, 1985,50(4):571-581
[20]Xu S Y,White R E.A physical model for shear wave velocity predicting[J].Geophysical Prospecting, 1996,44(4):687-717
[2]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[J].石油物探,2005,44(5): 504-508
[3]苑书金,董宁,于常青.叠前联合反演P波阻抗和S波阻抗的研究及应用[J].石油地球物理勘探,2005, 40(3):339-342
[4]Connolly P.Elastic impedance[J].The Leading Edge,1999,18(4):438-452
[5]Whitcombe D N,Connolly P A,Reagan R L,et al. Extended elastic impedance for fluid and lithology prediction[J].Geophysics,2002,67(1):63-67
[6]Verwest B,Masters A,Sena A,et al.Elastic impedance inversion[J].Expanded Abstracts of 70~(th) Annual Internat SEG Mtg,2000,1580-1582
[7]张奎,倪逸.三种弹性波阻抗公式比较[J].石油地球物理勘探,2006,41(增刊):7-11
[8]Foster D J,Keys R G,Reilly J M.Another perspec-tive on AVO crossplotting[J].The Leading Edge, 1997,16(9):1233-1239
[9]Keho T H.The AVO hodogram:using polarization to identify anomalies[J].Expanded Abstracts of 70~(th) Annual Internat SEG Mtg,2000,118-121
[10]Fu L Y.Joint inversions of seismic data for acoustic impedance[J].Geophysics,2004,69(4):994-1004
[11]Caianiello E R.Outline of a theory of thought-processes and thinking machines[J].Journal of Theoretical Biology,1961,1(2):204-235
[12]孟宪军,慎国强,王玉梅,等.叠前AVA地震纵横波阻抗同步反演技术研究[J].石油物探,2004,43(增刊):53-55
[13]崔炯成,吴媚,李维新,等.高分辨率非线性地震波阻抗反演方法和应用[J].石油物探,2007,46(1):1-12
[14]李爱山,印兴耀,张繁昌,等.叠前多参数同步反演技术在含气储层预测中的应用[J].石油物探,2007,46 (1):64-68
[15]苑书金.叠前地震反演技术的进展及其在岩性油气藏勘探中的应用[J].地球物理学进展,2007,22(3): 879-886
[16]唐晓花,成德安,吕金龙.叠前同步反演在徐家围子断陷火山岩气藏预测中的应用[J].石油物探,2009, 48(3):285-289
[17]Tonellot T,Mace D,Richard V.Joint stratigraphic inversion of angle limited stacks[J].Expanded Abstracts of 71~(st) Annual Internat SEG Mtg,2001, 227-230
[18]Tonellot T,Mace D,Richard V.3D quantitative AVA:joint versus sequential stratigraphic inversion of angle-limited stacks[J].Expanded Abstracts of 72~(nd) Annual Internat SEG Mtg,2002,253-256
[19]Castagna J P,Batzle M L,Eastwood R L.Relation-ships between compressional wave and shear wave velocities in clastic silicate rocks[J].Geophysics, 1985,50(4):571-581
[20]Xu S Y,White R E.A physical model for shear wave velocity predicting[J].Geophysical Prospecting, 1996,44(4):687-717
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