海上多层疏松砂岩储层渗透率级差计算

Permeability contrast of offshore layered unconsolidated sandstone reservoir

渗透率级差是反映储层纵向非均质性的关键因素。基于经验统计法,建立了一种合理评价海上油田渗透率级差的新方法,并制定渗透率级差计算模型筛选标准,分析了渗透率级差与储量产能损失率、开发方式之间的关系。以渤海A,B油田为例,使用渗透率级差计算模型,统计了其不同开发方式下的渗透率级差。该方法对于制定海上多层疏松砂岩油田注水注聚方案,分析油田动态变化特征,优化注水注聚参数,具有重要的参考意义。

Permeability contrast is a key factor reflecting reservoir heterogeneity.Based on the method of empirical statistics,a new model is established to evaluate offshore oilfields permeability contrast.The model screening criteria is established to analyze the relationships between permeability contrast and loss rate of reservoir as well as development methods.Considering different development methods,including water injection and polymer injection,the model is applied to calculate the commingled and layered permeability contrast of A&B oilfields in Bohai Bay.The results show that this new method of evaluating permeability contrast of offshore oilfields has a great significance in making development plan,analyzing production performance characteristics and optimizing injection parameters.