濮城油田注入水体积流量实验特征

Characteristics of Experiment of Volume Flowrate of Injected Water in Pocheng Oilfield

为了解注水过程中储层岩石特性的变化情况,在室内进行了现场注入水体积流量实验。根据注入不同孔隙体积倍数汪入水时岩样渗透率的变化,评价了注入水的敏感性。实验结果表明:濮城油田储层岩石在大量注入水冲刷下,会导致渗透率降低。受岩石胶结程度和渗透性影响,注入水孔隙体积倍数与渗透率变化曲线出现坐椅型、直线型和凸型等3种类型。空气渗透率越低,注入水的体积敏感程度越大。

In order to understand the variations of reservoir rock properties in water injection, a laboratory experiment is made on the volume flow rate of field injection water. The sensitivity of the injection water is evaluated based on permeability changes of rock samples as water injected with different multiples of pore volume. The result of experiment shows that permeability reduction will be caused by reservoir rocks under flushing of great amount of injection water in Pucheng Oilfield. Influenced by the degree of rock consolidation and permeability, curves of the multiples of pore volume of injection water and permeability changes are chair type, linear and bumped. The lower the airpermeability is, the higher sensitivity degree of injection water volume is.