纵波和转换波联合反演技术在松辽盆地北部LMD地区的应用
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摘要
常规纵波反演技术基于纵波地震资料,反演结果具有多解性。纵波和转换波联合反演技术基于纵波和转换波地震资料,由于增加了转换波地震资料这一约束条件,大大降低了反演结果的多解性,从而提高了储层预测的精度。纵波和转换波联合反演方法的基本原理是,通过建立纵波和转换波的反射系数线性方程,基于三维三分量地震资料,计算地层的纵波阻抗、横波阻抗和密度的反射率。首先基于正演模型,讨论了反演方法的精度;然后基于松辽盆地北部LMD地区的三维三分量地震资料,针对某气顶型油藏进行了反演,反演结果与实际地质特征吻合。
Conventional P-wave inversion is based on PP-wave seismic data,maybe have multi solutions.P-wave and PS-wave jointed inversion is based on PP-wave and PS-wave seismic data,which largely reduces the multi-solution because of the constraint of PS data, and eventually improves the precision of reservoir prediction.The basic principles of P-wave and PS-wave jointed inversion is,by building reflectivity linear equation of P-wave and S-wave,P-wave impedance,S-wave impedance and density reflectance can be computed based on 3D3C data.Firstly,the precision of inversion is discussed based on the forward modeling.Then,the jointed inversion is carried out on the gas-cap reservoir based on 3D3C seismic data in LMD area of northern Songliao Basin.The inversion result is consistent with the reservoir geologic characteristics.
Conventional P-wave inversion is based on PP-wave seismic data,maybe have multi solutions.P-wave and PS-wave jointed inversion is based on PP-wave and PS-wave seismic data,which largely reduces the multi-solution because of the constraint of PS data, and eventually improves the precision of reservoir prediction.The basic principles of P-wave and PS-wave jointed inversion is,by building reflectivity linear equation of P-wave and S-wave,P-wave impedance,S-wave impedance and density reflectance can be computed based on 3D3C data.Firstly,the precision of inversion is discussed based on the forward modeling.Then,the jointed inversion is carried out on the gas-cap reservoir based on 3D3C seismic data in LMD area of northern Songliao Basin.The inversion result is consistent with the reservoir geologic characteristics.
引文
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7 Zhang H B,Margrave G F,James Brown R.Joint PPPS inversion at Pikes Peak oil field[J].CREWES Research Report,2002,14(1):1-14
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9陈天胜,刘洋,魏修成.纵波和转换波联合AVO反演方法研究[J].中国石油大学学报(自然科学版),2006, 30(1):33-37
10付雷.大庆地区的三维AVO分析研究[J].石油地球物理勘探,2004,39(6):697-700
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12周竹生.P-SV波和SH波的AVO分析[J].石油地球物理勘探,1993,28(4):430-438
13甘永忠.用P-SV波叠加剖面合成横波层速度剖面[J].石油地球物理勘探,1995,30(1):56-61
14胡中平.用P-SV波AVO特性判别油气异常[J].石油地球物理勘探,1995,30(5):653-658
15马劲风,贾春环,李庆春,等.转换波人工合成地震记录和速度反演方法[J].石油地球物理勘探,1999,34(5): 509-519
16梅应祥,黄孟云.P波和P-SV波勘探[J].石油地球物理勘探,1993,28(增刊1):37-49
2 Aki K,Richards P G.Quantitative seismology[M].San Francisco,USA:W H Freeman and Company, 1980.144-154
3付雷.多波AVO分析在兴城地区的应用研究[J].石油地球物理勘探,2008,43(1):88-92
4 Stewart R R,Gaiser J E,Brown R,et al.Convertedwave seismic exploration:methods[J].Geophysics, 2002,67(5):1 348-1 363
5 Smith G C,Gidlow P M.Weighted stacking for rock property estimation and detection of gas[J].Geophysical Prospecting,1987,35(9):993-1 014
6 Larsen J A,Margrave G F,Lu H X,et al.Simultaneous P-P and P-S inversion by weighted stacking applied to the Blackfoot.3C-3D survey[J].CREWES Research Report,1998,10(50):1-23
7 Zhang H B,Margrave G F,James Brown R.Joint PPPS inversion at Pikes Peak oil field[J].CREWES Research Report,2002,14(1):1-14
8黄中玉,赵金州.纵波和转换波AVO联合反演技术[J].石油物探,2004,43(4):319-322
9陈天胜,刘洋,魏修成.纵波和转换波联合AVO反演方法研究[J].中国石油大学学报(自然科学版),2006, 30(1):33-37
10付雷.大庆地区的三维AVO分析研究[J].石油地球物理勘探,2004,39(6):697-700
11郑晓东.AVO理论和方法的一些新进展[J].石油地球物理勘探,1992,27(3):305-317
12周竹生.P-SV波和SH波的AVO分析[J].石油地球物理勘探,1993,28(4):430-438
13甘永忠.用P-SV波叠加剖面合成横波层速度剖面[J].石油地球物理勘探,1995,30(1):56-61
14胡中平.用P-SV波AVO特性判别油气异常[J].石油地球物理勘探,1995,30(5):653-658
15马劲风,贾春环,李庆春,等.转换波人工合成地震记录和速度反演方法[J].石油地球物理勘探,1999,34(5): 509-519
16梅应祥,黄孟云.P波和P-SV波勘探[J].石油地球物理勘探,1993,28(增刊1):37-49
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