A study of velocity and attenuation anisotropy characteristics of turbidite thin interbed saturated with fluid:A case study of Beihai turbidite
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摘要: 研究了含流体浊积岩储层的速度与衰减各向异性特征,分析了影响含流体浊积岩储层速度与衰减各向异性特征的主要因素.研究表明低频与高频条件下获得的含流体浊积岩弹性模量存在较大差异.通过速度各向异性分析可知,随着饱和度的增加,纵波速度增大;随着角度的增加,纵波速度增大;随着净毛比的增大,纵波速度减小.衰减各向异性分析结果表明层间流体流动导致平行于层理的纵波衰减小于垂直于层理面的纵波衰减;衰减依赖于介质非均匀性,当介质非均匀性最大时,衰减最大.
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关键词:
- 浊积岩 /
- 速度各向异性 /
- 衰减各向异性 /
- Backus理论 /
- Gassmann方程
Abstract: In this paper,the authors studied velocity and attenuation anisotropy characteristics of turbidite thin interbed saturated with fluid,and analyzed the main influence factors such as group angle,net-to-gross,saturation and porosity.The results show that there are differences in condition between low frequency and high frequency.Through the anisotropy velocity analysis,the authors detected that compressional wave velocity increases with the increase of saturation and angle,and compressional wave velocity decreases with the increase of the net to gross.Through the attenuation anisotropy analysis,it's known that compressional wave attenuation parallel to the bedding is less than the resuh perpendicular to the bedding plane.Attenuation depends on the medium heterogeneity,and when medium inhomogeneity is maximum,attenuation is the largest.-
Key words:
- turbidite /
- velocity anisotropy /
- attenuation anisotropy /
- Backus theory /
- Gassmann's equation
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