原油乳状液黏度影响因素及规律性研究

Study on Influencing Factors and Regularity of Crude Oil Emulsion Viscosity

研究了不同剪切速率下,二元、三元不同油水比、不同碱含量、不同二元配方条件下形成的乳状液体系黏度的影响因素及其规律。结果表明,高剪切速率下,油水比为7:3形成的三元乳状液最稳定,黏度最大;较高剪切速率下,油水比低于1:1的二元乳状液体系黏度很低,发生相转变;不加碱时,形成的二元乳状液体系黏度较大;加碱时,三元乳状液体系在较低剪切速率下形成的乳状液体系黏度较大,当剪切速率增加到一定值时,三元乳状液发生相转变,黏度降低,且随剪切速率增加变化不明显;低剪切速率下,聚合物+活性剂形成的二元体系乳状液黏度最大,碱+活性剂形成的二元体系乳状液黏度最小;当剪切速率超过一定值时,聚合物+碱形成的二元体系乳状液黏度最大,聚合物+活性剂形成的二元体系乳状液黏度最小。

The influence factors and laws of viscosity of emulsion system formed under different shear rates, different oil-water ratios of binary and ternary systems, different alkali contents and different binary formulations were studied. The results showed that the ternary emulsion with oil-water ratio of 7:3 was the most stable and the viscosity was the greatest at high shear rate. At higher shear rate, the binary emulsion system with oil-water ratio less than 1: 1 had very low viscosity and phase transition happened. When alkali was not added, the viscosity of formed binary emulsion system was larger. When alkali was added, the viscosity of ternary emulsion system formed at lower shear rate was higher. When the shear rate increased to a certain value, the ternary emulsion phase transition happened, and the viscosity decreased, and the change was not obvious with the increase of shear rate. At low shear rate, the viscosity of binary emulsion formed by polymer + active agent was the largest, while that formed by alkali + active agent was the smallest. When the shear rate exceeded a certain value, the viscosity of binary emulsion formed by polymer + alkali was the largest, while that formed by polymer + active agent was the smallest.