三种弹性波阻抗公式比较
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摘要
弹性波阻抗反演是一种结合了常规声阻抗反演和叠前AVO反演的地震反演技术。本文通过对不同的模型进行试算,分析比较了Connolly,Whitcombe等和Verwest等提出的三种弹性波阻抗公式。研究结果表明,由VerwestEI公式计算得到的反射系数比其他两种EI公式求得的反射系数精度高。与其他两种弹性波阻抗相比,VerwestEI可以作为更好的岩性指示器指导岩性和流体预测。
Elastic wave impedance inversion is a seismic inversion technique combining ordinary sonic impedance inversion with AVO inversion.After tests of different models,the paper analyzed and compared the three elastic wave impedance formulas presented separately by Mr.Connolly,Whitcombe et al and Verwest et al.The studied results showed that the reflectivity computed from Verwest EI formula has higher precision than that from other two EI formulas.In comparison with other two elastic wave impedances,the Verwest EI can better guide lithology and predict fluid as lithologic marker.
Elastic wave impedance inversion is a seismic inversion technique combining ordinary sonic impedance inversion with AVO inversion.After tests of different models,the paper analyzed and compared the three elastic wave impedance formulas presented separately by Mr.Connolly,Whitcombe et al and Verwest et al.The studied results showed that the reflectivity computed from Verwest EI formula has higher precision than that from other two EI formulas.In comparison with other two elastic wave impedances,the Verwest EI can better guide lithology and predict fluid as lithologic marker.
引文
[1]Connolly P.Elastic i mpedance.The Leading Edge,1999,18:438~452
[2]Whitcombe D N et al.Extended elastic i mpedance for fluid and lithology prediction.Geophysics,2002,67(1):63~67
[3]Bruce Verwest et al.Elastic i mpedance inversion.Ex-panded Abstracts of70th SEG Mtg,2000,1580~1582
[2]Whitcombe D N et al.Extended elastic i mpedance for fluid and lithology prediction.Geophysics,2002,67(1):63~67
[3]Bruce Verwest et al.Elastic i mpedance inversion.Ex-panded Abstracts of70th SEG Mtg,2000,1580~1582
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