叠前AVA多参数同步反演技术在含气储层预测中的应用
|
摘要
随着油气勘探的不断深入,叠前地震数据的反演和应用逐渐成为热点。叠前AVA同步反演可从小、中、大三个角度部分叠加数据体上同步反演出纵、横波阻抗和密度数据体。在此基础上,可提取出地层的组合弹性参数。通常砂岩储层含气后纵波速度明显降低,横波速度变化不大,同时密度也降低。与单纯应用纵波阻抗相比,纵、横渡阻抗等属性联合可提高流体的识别精度。因而,应用同步反演技术进行含气储层识别是可行的。首先介绍了叠前AVA同步反演的基本原理,继而从地震和测井资料处理、角度子波提取和标定以及最终反演等方面,讨论了叠前AVA同步反演技术在胜利油田中层气藏勘探中的应用。结果表明该方法进行含气储层预测是有效的。
With the development of oil & gas exploration,inversion and application of prestack seismic data is becoming the focus.Prestack simultaneous AVA inversion can simultaneously inverse P-wave and S-wave impedance and density data volume from small/middle/ far angle stacked data volume.Based on the inversion result,the combined elastic parameters can be obtained.Being filled with gas, the compressional velocity of sandstone will usually decrease,the shear velocity does not change much,and the density decrease.If only the acoustic impedance is used,the combination of attributes of P-wave and S-wave impedance can improve the discriminating ac- curacy of fluid.So it is feasible to discriminate gas-bearing reser- voir by using prestack simultaneous inversion technique.The basic principle of simultaneous inversion is introduced firstly and then the application of prestack simultaneous AVA inversion in exploration of middle-depth gas reservoir at Shengli oil field is discussed in some aspects,such as seismic data and well logs processing,angle wavelet extracting and calibrating,and inversion.The result shows that the method is effective in gas-bearing reservoir predic- tion.
With the development of oil & gas exploration,inversion and application of prestack seismic data is becoming the focus.Prestack simultaneous AVA inversion can simultaneously inverse P-wave and S-wave impedance and density data volume from small/middle/ far angle stacked data volume.Based on the inversion result,the combined elastic parameters can be obtained.Being filled with gas, the compressional velocity of sandstone will usually decrease,the shear velocity does not change much,and the density decrease.If only the acoustic impedance is used,the combination of attributes of P-wave and S-wave impedance can improve the discriminating ac- curacy of fluid.So it is feasible to discriminate gas-bearing reser- voir by using prestack simultaneous inversion technique.The basic principle of simultaneous inversion is introduced firstly and then the application of prestack simultaneous AVA inversion in exploration of middle-depth gas reservoir at Shengli oil field is discussed in some aspects,such as seismic data and well logs processing,angle wavelet extracting and calibrating,and inversion.The result shows that the method is effective in gas-bearing reservoir predic- tion.
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 Connolly P.Elastic impedance[J].The Leading Edge,1999,18(4):438～452
3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
4王保丽，印兴耀，张繁昌．弹性阻抗反演及应用研究[J]．地球物理学进展，2005，20(1)：89～92
5 Rasmussen K B.Simultaneous seismic inversion[J].EAGE 66th Conference & Exhibition,2004.1～4
6 Aki K,Richards P G.Quantitative seismology[M].Sansalito C A:University Science Books,2002.1～700
7 Fatti J L,Smith GC,Vail P J,et al.Detection of gas in sandstone reservoirs using AVO analysis:A 3-D seismic case history using the Geostack technique[J].Geophysics,1994,50:1 362～1 376
8黄伟传，武恒志，李子锋等．东营凹陷辛154井区三维地震资料多井约束反演及储层预测[J]．石油物探，2004，43(5)：466～470
9安鸿伟，李正文，李仁甫等．稀疏脉冲波阻抗反演在YX油田开发中的应用[J]．石油物探，2002，41(1)：56～60
10孟宪军．复杂岩性储层约束地震反演技术[M]．山东东营：中国石油大学出版社，2006．68～72
11印兴耀，袁世洪，张繁昌．从弹性波阻抗反演中提取岩石物理参数[A]．见：中国石油学会物探专业委员会及美国地球物理学家学会．CPS/SEG 2004国际地球物理会议论文集[C]．北京：CPS/SEG 2004国际地球物理会议，2004．538～542
12刘成斋，冉建斌，杨永生等．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[J]．石油地球物理勘探，2002，37(4)：401～406
13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
2 Connolly P.Elastic impedance[J].The Leading Edge,1999,18(4):438～452
3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
4王保丽，印兴耀，张繁昌．弹性阻抗反演及应用研究[J]．地球物理学进展，2005，20(1)：89～92
5 Rasmussen K B.Simultaneous seismic inversion[J].EAGE 66th Conference & Exhibition,2004.1～4
6 Aki K,Richards P G.Quantitative seismology[M].Sansalito C A:University Science Books,2002.1～700
7 Fatti J L,Smith GC,Vail P J,et al.Detection of gas in sandstone reservoirs using AVO analysis:A 3-D seismic case history using the Geostack technique[J].Geophysics,1994,50:1 362～1 376
8黄伟传，武恒志，李子锋等．东营凹陷辛154井区三维地震资料多井约束反演及储层预测[J]．石油物探，2004，43(5)：466～470
9安鸿伟，李正文，李仁甫等．稀疏脉冲波阻抗反演在YX油田开发中的应用[J]．石油物探，2002，41(1)：56～60
10孟宪军．复杂岩性储层约束地震反演技术[M]．山东东营：中国石油大学出版社，2006．68～72
11印兴耀，袁世洪，张繁昌．从弹性波阻抗反演中提取岩石物理参数[A]．见：中国石油学会物探专业委员会及美国地球物理学家学会．CPS/SEG 2004国际地球物理会议论文集[C]．北京：CPS/SEG 2004国际地球物理会议，2004．538～542
12刘成斋，冉建斌，杨永生等．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[J]．石油地球物理勘探，2002，37(4)：401～406
13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
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心