APS体系对京11 断块原油的乳化特性

Emulsification Property of ASP System on Crude Oil of the Jing 11 Block

雷小洋 游靖 单晓琨 李勇斌 井继哲 吴应德

LEI Xiaoyang YOU Jing SHAN Xiaokun LI Yongbin JING Jizhe WU Yingde

为明确三元复合驱油体系（ASP）对京11 断块原油的乳化特性，提高三元复合驱后采出液破乳脱水处理效果，室内模拟研究了油水乳状液形成时转速、单一驱油剂（聚合物、表面活性剂、弱碱）以及ASP体系对乳状液稳定性的影响。结果表明：转速对乳状液形成状态有较大的影响，转速越大，形成的乳状液液滴直径越小，乳状液越稳定。在转速4000 r/min、搅拌时间20 min的条件下，随聚合物浓度升高，乳状液稳定性增强，聚合物浓度大于300 mg/L后所形成的乳状液静置2 h 后的脱水率（＜5%）基本不再变化；表面活性剂在浓度大于500 mg/L后对乳状液稳定有明显的增强作用；弱碱浓度以1000 mg/L为转折点，随着弱碱浓度升高，乳状液稳定性先增强后减弱；ASP体系中，聚合物浓度对乳状液稳定性影响最大，弱碱影响最小。图4 表2参12

To clear the emulsification properties of ASP system on the crude oil of the Jing 11 block and improve the demulsification and dehydration treatment effect of the produced fluid of after ASP flooding，through the indoor experiment，the influence of rotation rate，single oil displacement agent（polymer，surfactant，alkaline）and ternary compound system on the emulsion stability on the formed oil-water emulsion was probed. The results indicated that，the rotation rate had great influence on the formation of emulsion. The bigger the rotation rate，the smaller the diameter of emulsion drops and the more stable the emulsion. At the rotation rate of 4000 r/min and the stirring time of 20 minutes，as the polymer concentration rose，the emulsion became stable，and when the polymer concentration was greater than 300 mg/L，the dehydration rate（＜5%）of the emulsion changed little. When the surfactant concentration was higher than 500 mg/L，the emulsion stability was strengthened obviously. Weak alkaline concentration was set 0.1% as the turning point，with the increase of weak base concentration，the emulsion stability enhanced firstly and then weakened. The components of the ternary compound system was arranged according to the influence of their on the emulsion stability，polymer concentration＞surfactant concentration＞weak alkaline concentration.

10.19346./j.cnki.1000-4092.2017.04.023