测井曲线重构技术在储层反演中的应用

APPLICATION OF WELL LOGGING CURVE RECONSTRUCTION TECHNIQUE IN RESERVOIR PREDICTION

波阻抗反演是储层预测的一种重要手段,但是当储层与非储层(围岩)波阻抗差异不明显时,利用常规波阻抗反演技术难以较好地识别储层。而测井曲线重构技术可以有效提高岩性识别和储层预测的精度,减少多解性。这里结合川西坳陷须家河组勘探实践,利用GR曲线重构声波反演技术对有利区域进行了预测,有效地提高了反演剖面的分辨率,并在一定程度上提高了岩性解释的准确性和精度。同时,比较了常规波阻抗反演与该方法的区别,取得了良好的效果。

In case of the difference of acoustic impedance between reservoir layers and non-reservoir layers is too little to be differentiated,it is very difficult to identify the reservoir using the inversion method of conventional impedance in some fields though impedance inversion is a important method in reservoir prediction.In order to resolve this problem and decrease the ambiguity,the technique of reservoir-identifying logging curve reconstruction is used.The authors use the technique of GR logging curve reconstruction to predict reservoirs in the depression of Xujia River series in western SiChuan.the resolution of inversion profile has been effectively increased,and the accuracy of the interpretation of lithology has been enhanced.Compared with the conventional impedance inversion,this method achieved remarkable results.