何永清,鲁霖懋,周其勇,秦嘉敏,陈磊
HE Yongqing,LU Linmao,ZHOU Qiyong,QIN Jiamin,CHEN Lei

• 1:中国石油新疆油田公司吉庆油田作业区

摘要(Abstract)：

为了有效降低稠油黏度，进一步提高稠油油藏热采开发后的采收率，以甲基丙烯酰胺MAA、二甲基二烯丙基氯化铵DMDAAC和有机硅表面活性单体T-Si为原料，制备了一种适合稠油油藏化学降黏开采用的MDT-1型两亲性稠油乳化降黏剂，并对其结构进行了表征，评价其综合性能。结果表明：当MDT-1型乳化降黏剂质量浓度为5 g/L时，对目标稠油样品的降黏率可以达到99.22%；对目标稠油的静态洗油率可以达到68.9%；注入1 PV质量浓度为5 g/L的MDT-1型乳化降黏剂后，油藏采收率可比水驱阶段提高37.08百分点；MDT-1型乳化降黏剂与稠油所形成的油水乳状液稳定性较差（120 min脱水率大于80%），乳化降黏后不会增加破乳脱水的工作难度。MDT-1型乳化降黏剂具有良好的界面活性、润湿性、降黏性、驱油性，且洗油效果较好，能够进一步提高稠油油藏热采采收率。研究成果对中深层稠油油藏的高效开发具有一定的指导意义。
In order to effectively reduce heavy oil viscosity and further improve recovery factor after thermal recovery of heavy oil reservoirs, taking methylacrylamide(MAA), dimethyldiallylammonium chloride(DMDAAC) and organosilicon surfactant monomers(T-Si) as raw materials, amphiphilic emulsified viscosity reducer MDT-1 for chemical viscosity reduction of heavy oil reservoirs is prepared with its structure characterized for comprehensive performance evaluation. The results show that MDT-1 with mass concentration of 5 g/L gets viscosity reduction rate of 99.22% and static oil washing rate of 68.9% of target heavy oil sample. After injecting 1 PV MDT-1 solution with mass concentration of 5 g/L, recovery factor of reservoirs is increased by 37.08 percentage points of water drive stage. Oil-water emulsion formed by emulsified viscosity reducer MDT-1 and heavy oil has poor stability(dehydration rate in 120 min is >80%), without increasing difficulty of demulsification and dehydration treatment after emulsified viscosity reduction. Emulsified viscosity reducer MDT-1 further enhances thermal recovery of heavy oil reservoirs for its high interfacial activity, wettability, viscosity reduction, oil displacement performance, and good oil washing effect.The research results have certain guiding significance for the efficient development of medium-deep heavy oil reservoirs.

关键词(KeyWords)： 稠油油藏;乳化降黏剂;两亲型聚合物;界面活性;破乳脱水
heavy oil reservoir;emulsified viscosity reducer;amphiphilic polymer;interfacial activity;demulsification and dehydration

Abstract:

Keywords:

基金项目(Foundation): 国家科技重大专项子课题“稠油油田高效开发新技术研究”（2017ZX05025-002）

作者(Author): 何永清,鲁霖懋,周其勇,秦嘉敏,陈磊
HE Yongqing,LU Linmao,ZHOU Qiyong,QIN Jiamin,CHEN Lei

DOI: 10.19597/j.issn.1000-3754.202211015

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