大庆原油的流变性质及乳化降粘研究

The Rheological Properties of Daqing Crude Oil and the Research of Emulsification-viscosity-depression

研究了大庆原油在不同温度下的流变性质,研制出ASA-2型降粘剂,并考察了其耐盐性;对比分析了3种商品化降粘剂JN-8、HW-9、AG-13与自制ASA-2的乳化降粘效果。结果表明,大庆原油在温度30℃以下粘度较高,其流变性质具有宾汉流体特征;温度高于40℃后,其流变性接近于牛顿流体;自制降粘剂ASA-2对CaCl2的容忍度达90mg.L-1,对MgCl2的容忍度达40 mg.L-1,对NaCl的容忍度达31000 mg.L-1;在温度为30℃、含水量为3%的条件下,ASA-2降粘率可达88.5%,达到了原油输送要求,且性价比高,具有工业开发应用价值。

The rheological properties of Daqing crude oil were studied at different temperatures,and a kind of viscosity reducer,named ASA-2, was synthesized, and its salt resistance was tested. The viscosity-reducing results of three kinds of commercial viscosity reducers,JN-8, HW-9, AG-13, were compared with that of ASA- 2. The experimental results showed thai when the temperature was below 30℃, Daqing crude oil had high viscosity and was of the properties of the Bingham fluid; when the temperature was above 40℃, the properties of Daqing crude oil was close to the Newtonian fluid;The salt resistance of ASA-2 was tested,and calcium chloride tolerance could reach 90 mg ·L^-1 ,magnesium chloride tolerance could reach 40 mg · L^-1, sodium chloride tol- erance could reach 31 000 mg · L^-1. When the content of water was only 3%,the viscosity-reducing rate of ASA-2 could reach 88.5 % at 30℃, meeting the requirements of transportation. Because of the good performance and relative low price,ASA-2 has the value of development and application.