针对目前毛管力测试方法无法准确反映出渗流过程中毛管力的动态变化问题,在借鉴气水两相动态毛管力的基础上,提出了油水两相动态毛管力的概念,并制作了动态毛管力测试装置.利用半渗透薄膜分别制作了单独测量油相和水相的压力传感器,在人工胶结岩心两个表面对称制作了8个压力测试点,采用环氧树脂将油相压力传感器与水相压力传感器紧密固定在人工胶结岩心上,采用类似稳态法测相渗曲线的实验流程,注入比例恒定的油水混合液体,测试不同饱和度条件下的毛管力.利用动态毛管力测试仪,对人工胶结岩心的动态毛管力进行了测量,得到了3条不同驱替速度条件下的动态毛管力曲线,分析发现,不同驱替速度条件下的毛管力数值存在差异,并且会对水驱油过程的数值计算带来较大影响.%At present, the capillary force test method cannot reflect the dynamic change of capillary force in the process of porous flow. To solve this problem, the concept of oil-water two-phase dynamic capillary force was put forward on the basis of gas-water two-phase dynamic capillary force, and the dynamic capillary force test unit was prepared. The pressure sensor to measure oil phase and water phase independently was developed respectively by using the semi-permeable membrane. 8 pressure testing points were set symmetrical-ly on two surfaces of the artificial core, and oil-phase pressure sensor and water-phase pressure sensor were fixed firmly to the artificial core with epoxy resin. The experimental process was similar to the one that is used to measure relative permeability curve by means of steady state method. Oil-water mixture was injected at the constant proportion and the capillary force under different saturations was measured. The dynamic capillary force on the artificial core was measured by means of the dynamic capillary force testing unit, and the dynamic capillary force curves corresponding to 3 displacement velocities were plotted. It is indicated that the numerical value of capillary force varies with the displacement velocity and has more effect on the numerical calculation of water displacing oil process.
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