特低渗透油层储层非均质性对油水分布的影响

利用压汞资料对储层微观非均质性进行了研究，对比汞饱和度为３５％的孔喉半径Ｒ３５值的分布与喉峰值分布，认为在同一地区，Ｒ３５值分布特征表征了储层孔喉分布特征，因此，Ｒ３５值分布的非均质特征表征了储层微观百均质性。对于非构造圈闭控制油藏，不同Ｒ３５值分布区间的储层，其储集的流体性质不同，这与流体在非均质储层内的二次运移和聚集有关。

EFFECT OF HETEROGENEITY IN ULTRA-LOW PERMEABLE RESERVOIRS ON OIL/GAS DISTRIBUTION

This paper studies the micro heterogeneity of reservoirs using mercury injection data It compares the distribution of pore throat diameter R 35 value and pore throat peak value under the mercury saturation of 35% and proposes that the R 35 value distribution in an area characterizes the pore throat distribution So the heterogeneous distribution of R 35 value characterizes the micro heterogeneity of reservoirs In the reservoirs controlled by non structural trap, the reservoirs in different distribution intervals of R 35 value have different fluids, which is related to the second migration and accumulation of fluid in heterogeneous reservoirs