Experiment on Viscosity Properties of Viscous Crude Oil in Tahe Oilfield

Abstract

Under the different temperature and pressure, the viscosity was measured of the viscous crude oil from the TK427 well supplied by Tahe oilfield and its mixture that the water-cut and gas content are different with high temperature and high pressure viscosimeter. The relationship between the viscosity of the crude oil and its mixture and the temperature or the pressure was discussed with curve-fitting method. It indicates that the viscosity and temperature character fit to exponential law, the viscosity is linear transformation with the pressure. The gas content strongly influences the viscosity of the crude oil. The viscosity of the gas-oil has a minimal value varying with the pressure, and the viscosity of the water-bearing oil has a maximal value varying with the water-cut.