Laboratory Test of Fluid Physical Property Parameters of Well Fluid Containing CO2

Change regulation of the physical properties fluid is key to accurately predicting multiphase flow in production wellbore CO2 flooding reservoirs. Given characteristics significant changes pressure, temperature, and content whole wells reservoirs, this paper systematically studied change rules volume factor, viscosity, density, solubility well for pressure 5~30 MPa, temperature 20~120 °C, 10~90% through single degassing PVT experiments. According experimental results, factor crude oil increases first then decreases with increase. At bubble point (20 MPa), can reach 1.89 at high temperatures. The be increased from 1.28 1.44 8 MPa when 20 °C 120 °C. Under increase CO2, viscosity rapidly. In contrast, above saturation oil. freezing (24 °C), sharply temperature. not sensitive has a impact on density fluid. 5 which reduce 0.93 g/cm3 0.86 g/cm3. pressure. When 15 by 36.56 cm3/cm3. results support law prediction gas–liquid ratio.