王秋霞 王弘宇 张华

摘      要：针对目前国际低油价形势，自主研发了新型洗油剂，该冷采洗油剂根据分子模拟结果调整了低聚剂分子结构，提升静态洗油效率;新型低聚洗油剂体系在低浓度条件下表现出较好的驱油效果，针对胜利油田油区稠油，在使用浓度为50 μg·g-1时，静态洗油效率超过95%。优化洗油剂中试生产工艺，对上述改进型洗油剂中试工艺进行反应温度、时间及催化剂用量等方面的优化，可以实现200 g ～1 kg级别放大生产，反应总产率不低于80%。2015年7月在东胜公司的金17斜31井开展了现场应用，措施前该井低液全水，措施后日油稳定在1.2 t·d-1，实现了问题井的正常生产。

关  键  词：低聚洗油剂;强化冷采;稠油

中图分类号：TE357.46       文献标识码： A       文章编号： 1671-0460（2020）08-1750-04

Abstract： In view of the current situation of low oil price in the world， a new type of oil washing agent was independently developed. According to the results of molecular simulation， the molecular structure of the oligo type oil washing agent was adjusted to improve the static oil washing efficiency. The new type of oligomer oil washing agent system showed good oil displacement effect under the condition of low concentration. For heavy oil in Shengli oilfield， when the concentration in use was 50 μg·g-1， the static oil washing efficiency was more than 95%. By optimizing the pilot production process of oil washing agent and optimizing the reaction temperature， time and catalyst dosage， 200 g～1 kg scale-up production was realized， and the total yield of the reaction was not less than 80%. In July 2015， the field application was carried out in Jin17-Xie31 well of Dongsheng company. Before using the measure， the well had low liquid and full water， and after using the measure， the daily oil was stable at 1.2 t·d-1， the normal production of problem wells was realized.

Key words： Oligo oil washing agent; Enhanced cold recovery; Heavy oil

伴随着中国经济的快速发展，油气资源与需求的矛盾日益加剧。相对于世界上其他油气资源富集的国家而言，中国的油气资源品位较低，开采难度大。胜利油田稠油油藏同国内外其他油田稠油油藏相比具有埋藏深、黏度高、油层薄、边底水活跃的特点，开采难度位居世界稠油油藏的前列[1-3]。如何提高已动用储量的采收率、实现未动用储量的有效動用是确保胜利油田产量稳定的关键。

胜利油田稠油油藏累计探明地质储量超过15亿t，其中热采稠油储量6.6亿t，动用5.29亿t，阶段采收率19.8%，多数区块处于多轮次吞吐阶段，汽窜、水侵严重，油汽比低，经济效益下降[4-6];常规水驱开发稠油储量2.3亿t，阶段采收率20.8%，部分区块受埋深、渗透率低、高温……