反演密度属性体在含水饱和度预测中的应用

Application of Inverted Density Attribute Body to Saturation Prediction

密度参数在储层评价中的应用越来越受到重视,在俄罗斯V工区反演的密度属性体被成功应用于计算砂层的含水饱和度。通过分析及验证稳定沉积环境下不同孔隙岩石的密度参数和含水饱和度之间的关系,认为密度随着饱和度的增加呈线性增长趋势,而致密砂岩中流体含量对密度参数影响不大;通过叠前同时反演可以获得反演的密度数据体,将这种线性关系应用到俄罗斯V工区中加以验证,结果显示预测的含水饱和度和实钻结果基本吻合。实际应用结果表明,稳定沉积环境下可以利用反演密度属性体来预测储层的含水饱和度。

Application of density parameters is becoming more and more important in reservoir evaluation. The inverted density attribute body has been used successfully to calculate water saturation in sandstone reservoirs in V area of Russian. Through analysis of the relationship between density of reservoirs with different porosity and water saturation under stable sedimentary environment, it is concluded that the density of reservoirs increases linearly with saturation, while the fluid content in tight sandstones has little influence on the density parameters. Inverted density dataset has been obtained from pre-stack simultaneous inversion, and has been applied to validation of linear relation in area V of Russian. The saturation estimation results are basically consistent with logging analyzing results. The application results show that the inverted density attribute body can been used to calculate water saturation under stable sedimentary environment.