An Experimental Study on Chemical Viscosity Breaking and Freeze-point Depressing of Heidimiao Crude Oil

Based on the properties of Heidimiao crude oil in Longhupao oilfield, a laboratory study is carried out on chemical viscosity breaking measures and the HDM crude oil fluidity improver is selected. Laboratory experimental study with the HDM agent shows that the pure degree of freeze - point depression of the Heidimiao crude oil is 12 ℃, while both the mixed Putaohua - Sartu crude oil and the mixed Heidimiao - Putaohua - Sartu crude oil are 10℃ and that the ranges of viscosity breaking of the Heidimiao crude oil, the mixed Putaohua - Sartu crude oil and the mixed Heidimiao - Putaohua - Sartu crude oil are 52. 00% - 64. 98%, 45. 34% - 52. 49% and 46. 84% - 53. 73% respectively.