低渗透储层具有物性差、非均质性强, 存在天然微裂缝以及储层连通性各向异性等特点。因此进行单井控制储量计算时, 如果简单地采用通过划分单井控制面积这种传统的方法来计算, 计算结果将会出现与真实值不符的现象。本文结合流动单元的划分原理以及低渗透气田储层特征, 提出了流动单元法计算单井控制储量, 即先划分流动单元, 再以流动单元体为计算单元计算单井控制储量。最后与通过划分单井控制面积法计算得到的单井控制储量及通过动态储量计算方法计算得到的单井动储量进行对比分析, 其结果论证了流动单元法计算单井控制储量的科学性和实用性, 使流动单元的研究在低渗透气田油藏精细描述中得到了进一步的推广和应用。

Low permeability reservoir is characterized by poor physical properties, heavy heterogeneity, natural micro-fracture and connectivity anisotropy etc. The result will not conform to the real value if we simply calculate the single well controlled reserves by the conventional way of dividing the oil area. According to theory of flow unit dividing and the characteristics of low permeability reservoir, the flow unit method is put forward. It is to divide the flow units, and then calculate the single well controlled reserves regarding the flow unit as the calculating unit, finally, compare and analyze the results from this method, single well controlled area method and dynamic pressure drawdown method respectively. The comparison result proves the scientificity and practicability of the flow unit method.