利用双参数预测储层的孔隙率

Reservoir porosity prediction using two parameters

本文介绍了双参数预测储层孔除率的新方法，旨在同时利用纵、横波速度或时差和密度观参数来预测储层的孔隙率。据D．Eberhart－Phillips的岩石物理实验测定结果[3]和JLK地区6口测井资料的计算结果表明：利用纵、横波速度联合求取的孔隙率的平均相对误差为7.86％；利用时差和密度联合求取的孔隙率的平均相对误差为13．0％。另外，该方法在获得预测孔隙率值的同时，还可得到较可靠的泥质含量值，这对于揭示储层的非均质性具有十分重要的意义。

Reservoir porosity prediction using two parameters is a new method for pre-dicting reservoir porosity by using two parameters,namely,velocities of P-wave andS-wave,or interval time and density. The laboratory result of D. Eberhart-Phillipsand the computation result of logging data from six boreholes in JLK area indicatethat the average relative error of the porosities derived from velocities of P-waveand S-wave is 7. 86%,and that the average relative error of the porosities derivedfrom interval time and density is 13. 0%.Besides the predicted porosity, the method also offers reliable shale content,which is very significant to discovering the heterogeneity of a reservoir.