Abstract: Taking the heavy oil production liquid in a block of Liaohe oilfield as the research object, a compound viscosity reducer was formulated according to the current situation, and the effect of the ratio and amount of such viscosity reducer on the viscosity of heavy oil emulsion was studied. The emulsified viscosity reducing agent is composed of non⁃ionic surfactant Triton X⁃100 and zwitterionic surfactant dodecyldimethyl betaine (BS⁃12).The experimental results show that when the mass fraction of 1.6% Triton X⁃100 is added into the heavy oil alone, the viscosity reduction rate of the heavy oil can reach 75.93%; BS⁃12 with a mass fraction of 0.6% and Triton with a mass fraction of 1.6%. Triton X⁃100 is compounded by a volume ratio of 1∶1, and the viscosity reduction rate of heavy oil can be increased to 92.63%. In addition, when the complex system is added in a volume ratio of 1∶1∶1, weak alkali sodium carbonate with a mass fraction of 0.4% is added. After the aqueous solution, the viscosity reducing rate of heavy oil can be further increased to 93.14%, and the stability of the compounding system is also improved.

Key words: Triton X?100, Heavy oil, Surfactant, Emulsfication viscosity reduction, Compounding system

摘要： 　以辽河油田某区块稠油采出液为研究对象，针对其现状配制出复合降黏剂，研究此类降黏剂配比和用量对稠油乳状液黏度的影响。采用的乳化降黏剂由非离子型表面活性剂曲拉通X⁃100（Triton X⁃100）、两性离子型表面活性剂十二烷基二甲基甜菜碱（BS⁃12）复配而成。结果表明，将质量分数为1.6%的Triton X⁃100单独加入稠油中，稠油的降黏率可达75.93%；将质量分数为0.6%的BS⁃12与质量分数为1.6%的Triton X⁃100按体积比1∶1复配，稠油降黏率可提高至92.63%；当复配体系按体积比1∶1∶1加入质量分数为0.4%的弱碱碳酸钠水溶液后，可进一步提高稠油的降黏率至93.14%，同时提高了复配体系的稳定性。

关键词: 曲拉通X?100, 稠油, 表面活性剂, 乳化降黏, 复配体系