塔河油田稠油乳状液破乳剂优选复配初探

Optimization and Composition of Heavy Oil Emulsion Demulsifiers in Tahe Oilfield

针对塔河油田稠油区块的稠油乳状液破乳效果不理想的情况,为了获得效果良好的破乳工艺技术,本文采用瓶试法,对8种破乳剂进行筛选评价,优选出最优的破乳剂并与絮凝剂进行复配,以期获得理想的破乳效果。研究结果表明,破乳剂R-15和P-16的脱水效果最佳,脱水率分别为25.21%和25.58%。进一步将上述优选的破乳剂与絮凝剂聚合氯化铝复配,脱水率有了很大幅度的提高,达到76.36%。对塔河油田稠油进行破乳时,可选用型号为P-16的破乳剂,当浓度为175mg·L^(-1)、PAC溶液浓度为100mg·L^(-1)、破乳温度78℃时,破乳1h,脱水率为76.36%。

Aiming at the unsatisfactory situation of heavy oil demulsification in heavy oil blocks of Tahe oilfield,a well functioning demulsification process technology was obtained.Eight demulsifiers were screened and evaluated through the bottle test method,and the optimal demulsifiers were selected and mixed with flocculants to achieve an ideal demulsification effect.The results showed that the single demulsifier types R-15 and P-16 had the best dehydration effect,with dehydration rates of 25.21%and 25.58%,respectively.After further mixing the above selected demulsifier with the flocculant polyaluminum chloride,the dehydration rate was greatly improved and reached 76.36%.The demulsifier model for heavy oil demulsification in Tahe oilfield was P-16 with a concentration of 175 mg/L,PAC solution with a concentration of 100 mg/L,demulsification temperature of 78℃,and dehydration rate of 76.36%for 1h of demulsification.