升平油田葡萄花油层最佳提液速度室内实验研究

为了进一步探索升平油田葡萄花油层提液对驱油效率的影响及作用,确定最佳提液速度,选取不同渗透率级别、变异系数的人造岩心进行室内物理模拟实验,研究不同注入速度、不同注入PV数、不同渗透率级别、不同注入时机及非均质性对驱油效率的影响,为确定升平油田葡萄花油层最佳提液速度提供理论依据。实验结果表明:对于不同渗透率级别的人造均质岩心,驱替速度均为25mL/h时采收率最高;在不同驱替速度,同一渗透率的条件下,最佳注入PV数界限为0.4。对于渗透率变异系数在0.5~0.85之间的非均质人造岩心驱替速度为20mL/h时,采收率最高;在渗透率为300md变异系数为0.5和渗透率为200md变异系数为0.65的非均质岩心中,当驱替速度为20mL/h时,最佳注入PV数界限为0.3,其他的驱替速度情况下,最佳注入PV数的界限为0.2。而在渗透率为200 md变异系数为0.85的非均质岩心中,最佳注入PV数界限为0.3。

The indoor experimental study of best carry liquid speed at putaohua layer on shengping oil field

In order to explore the influence and function of putaohua reservoir liquid oil carry oil displacement efficiency on shengping oil field,to determine the best carry liquid speed,we select the different level,variation coefficient of permeability artificial core indoor physical simulation experiment to study different injection rate and injection,the number of different PV different levels,and different permeability timing and into the heterogeneity impact on oil displacement efficiency,to determine the best wine putaohua reservoir of oil field carry liquid speed to provide the theory basis.The experiment results show that the different levels of the permeability artificial homogeneous core,flooding are 25mL/h for speed when it is highest recovery;In different flooding for speed,the same permeability,in the condition the best number is 0.4 PV into line.For the permeability coefficient of variation in the range of 0.5 to 0.85 of heterogeneous artificial core,displacement for 20mL for speed/h is the highest recovery;In the heterogeneous cores of permeability for 300md with 0.5 variation coefficient and permeability for 200md with 0.6 variation coefficient,when flooding is 20mL/h for speed,best into several boundaries is 0.3 PV,and on other flooding for speed,the number of best PV boundaries is 0.2.And in the heterogeneity core of permeability for 200md with 0.85 variation coefficient,the best boundary number is 0.3 PV.