有机颗粒高温封堵体系的研制与性能评价

Prepration and Performance Evaluation of Organic Particle Heat Resistant Plugging System

舒 展 裴海华 张贵才 曹 旭 葛际江 蒋 平

SHU Zhan PEI Haihua ZHANG Guicai CAO Xu GE Jijiang JIANG Ping

目前稠油油藏的开采方式主要以热采为主，针对稠油热采过程中出现的汽窜现象，研究了一种耐温耐盐蒸汽封堵体系。确定了最佳配方为：1%沥青粉颗粒+0.7%胍胶+0.05%表面活性剂复配体系（十六烷基三甲基氯化铵、十六烷基三甲基溴化铵质量比2∶3），研究了该体系的耐温耐盐性能、高温封堵性能、耐冲刷性能及油水选择性封堵能力。研究表明：该蒸汽封堵体系在高温高盐条件下析水率不超过20%。同时该堵剂具有较好的耐盐性能，使用矿化度为100 g/L的地层水配制堵剂的析水率小于30%。沥青粉颗粒高温堵剂对不同渗透率岩心的封堵率均能保持在90%以上，且注入蒸汽长时间冲刷后封堵率降低率低于3%，具有较好的耐冲刷性能。沥青粉颗粒高温堵剂具有较好的选择性封堵能力，对水层的封堵率可以达到85%以上，而对油层的封堵率低于20%。

At present，the main exploitation way of heavy oil is thermal production. Aiming at the steam channeling during the thermal production，a temperature-resistant and salt-resistant steam plugging system was studied. The best formula was determined as follows：1% asphalt powder particles + 0.7% guar gum + 0.05% surfactant compound system（mass ratio of cetyl trimethyl ammonium chloride to cetyl trimethyl ammonium bromide was 2∶3）. The temperature and salt resistance，high temperature blocking performance，erosion resistance and oil-water selective blocking ability of the system were investigated. The experimental results showed that the steam plugging system had a water separation rate of less than 20% under high temperature and high salt conditions. At the same time，the plugging agent had good salt resistance. The water separation rate of the plugging agent prepared with formation water with a salinity of 100 g/L was less than 30%. The plugging rate of asphalt powder particle high-temperature plugging agent for cores with different permeability could be maintained above 90%，and the plugging rate reduction rate after long-term scouring with steam injection was less than 3%，exhibiting a good erosion resistance. Asphalt powder particle plugging agent had good selective plugging ability，the plugging rate for water layers could reach over 85%，while the plugging rate for oil layers was less than 20%.

10.19346/j.cnki.1000-4092.2021.01.014