Experimental Analytic Study on Viscous Crude Oil Physical Properties in Daqing Oilfield

The physical properties of viscous oil of high viscosity and density differ greatly from common crude oil.The paper has described the domestic and foreign classification standards and basic properties of viscous oil.At the same time,a correlation study has been carried out between the high pressure physical properties experimental result of viscous oil and the high pressure physical properties data of black oil in Daqing oilfield.The result indicates that the viscous oil in Daqing oilfield is featured by shallow buried depth,high in-place oil viscosity and density,low gas and paraffin contents and low saturation pressure.Analysis leads to conclusions that hot steam injection recovery mode should be suitable for viscous oil development in Daqing oilfield and that pressure and dissolved gas factors should not be over considered in thermal recovery.