基于叠前振幅随角度变化反演的储层流体识别方法
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摘要
从理论模型入手,首先研究流体参数变化对地震弹性参数及地震记录的影响,然后用胜利油田某区块的实际资料进行叠前振幅随角度变化(AVA)弹性反演。在反演基础上,以振幅随炮检距变化(AVO)分析为基础,提取反映流体特征的不同属性,在剖面与平面上指示出储层流体的特征。反演结果与实际钻井资料吻合率较高,说明叠前反演与AVO属性分析结合是预测储层流体性质的一种有效方法。
The influnce of fluid parameters variation on seismic elastic parameter and seismic record were researched on the basis of theoretical model.And then prestack amplitude variation with angle(AVA) elasticity inversion was carried out by using Shengli block s real data.Based on inversion and amplitude variation with offset(AVO) analysis,different attributes of fluid characteristic were extracted and reservoir fluid characteristics on profile and plane were predicted.The inversion results agree well with real well-drilling data,which shows that the combination of prestack inversion and AVO attribute analysis is an effective method of reservoir fluid prediction.
The influnce of fluid parameters variation on seismic elastic parameter and seismic record were researched on the basis of theoretical model.And then prestack amplitude variation with angle(AVA) elasticity inversion was carried out by using Shengli block s real data.Based on inversion and amplitude variation with offset(AVO) analysis,different attributes of fluid characteristic were extracted and reservoir fluid characteristics on profile and plane were predicted.The inversion results agree well with real well-drilling data,which shows that the combination of prestack inversion and AVO attribute analysis is an effective method of reservoir fluid prediction.
引文
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[8]殷文.叠前弹性波反演非线性优化方法[J].中国石油大学学报:自然科学版,2008,32(3):45-49.YIN Wen.Nonlinear optimization method on prestack elas-tic-wave inversion[J].Journal of China University of Pe-troleum(Edition of Natural Science),2008,32(3):45-49.
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[10]SHUEY R T.A simplification of the Zoeppritz equations[J].Geophysics,1985,50(4):609-614.
[11]GASSMANN F.Uber die elastiztat poroser medien:Vier-teljahrsschr[J].Der Naturforsch Gesellschaft Zurich,1951,96:1-21.
[12]BIOTMA.Theory of propagation of elastic waves in fluid-saturated porous solidⅠ:low frequency range[J].Acoust Soc Am,1956a,28:169-178.
[13]BIOTMA.Theory of propagation of elastic waves in fluid-saturated porous solidⅡ:high frequency range[J].Acoust Soc Am,1956b,28:179-191.
[2]SMITH G C,GIDLOW P M.Weighted stacking for rockproperty estimation and detection of gas[J].GeophysProsp,1987,35:993-1014.
[3]殷八斤,曾灏,杨在岩.AVO技术的理论与实践[M].北京:石油工业出版社,1995:68-86.
[4]张如伟,黄捍东,于茜,等.叠前AVA反演预测储层流体的方法与应用[J].石油天然气学报,2008,30(1):250-253.ZHANG Ru-wei,HUANG Han-dong,YUQian.Method andapplication of prestack AVA inversion to predict reservoirfluid[J].Journal of Oil and Gas Technology,2008,30(1):250-253.
[5]CONNOLLY P.Elastic impedance[J].The Leading Edge,1999,18(4):438-453.
[6]WHITCOMBE D N,CONNOLLY P A,REAGAN R L,etal.Extended elastic impedance for fluid and lithology pre-diction[J].70th SEG Annual Meeting,Expanded Ab-stracts,2000,19:138-141.
[7]黄捍东,张如伟,孟宪军,等.基于小波变换的叠前地震弹性参数反演[J].石油地球物理勘探,2008,43(5):562-567.HUANG Han-dong,ZHANG Ru-wei,MEMG Xian-jun.Wavelet transform based prestack seismic elastic parameterinversion[J].Oil Geophysical Prospecting,2008,43(5):562-567.
[8]殷文.叠前弹性波反演非线性优化方法[J].中国石油大学学报:自然科学版,2008,32(3):45-49.YIN Wen.Nonlinear optimization method on prestack elas-tic-wave inversion[J].Journal of China University of Pe-troleum(Edition of Natural Science),2008,32(3):45-49.
[9]AKI K,RICHARDS P G.Quantitative seismology:theoryand methods[M].1 ed.San Francisco:W.H.Freemanand Company,1980:100-170.
[10]SHUEY R T.A simplification of the Zoeppritz equations[J].Geophysics,1985,50(4):609-614.
[11]GASSMANN F.Uber die elastiztat poroser medien:Vier-teljahrsschr[J].Der Naturforsch Gesellschaft Zurich,1951,96:1-21.
[12]BIOTMA.Theory of propagation of elastic waves in fluid-saturated porous solidⅠ:low frequency range[J].Acoust Soc Am,1956a,28:169-178.
[13]BIOTMA.Theory of propagation of elastic waves in fluid-saturated porous solidⅡ:high frequency range[J].Acoust Soc Am,1956b,28:179-191.
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