新型抗高温就地聚合凝胶体系研制与性能评价

发布时间：2018-05-18 11:39

本文选题：高温高盐油藏 + 就地聚合凝胶　；参考：《西南石油大学》2015年硕士论文

【摘要】：本文以高温高盐油藏为研究对象,开展相应堵水技术的研究,主要完成了以下内容并取得了相应的成果,克服了组分较多、成胶时间太短及稳定性较差等缺陷。 (1)根据高温高盐油藏的特点与要求,研制出了一种组分少、易泵入、成胶时间可调、成胶强度高、封堵能力强、耐温耐盐和耐冲刷的就地聚合凝胶堵水剂,并确定了堵水剂体系的最佳组成。 (2)通过对堵水剂进行室内静态评价,确定了堵水剂适应的pH值范围,并考察了温度及矿化度对堵水剂成胶性能的影响。①堵水剂体系在pH值5.0-9.0之间强度和长期稳定性都较好；②堵水剂体系在矿化度为25×104mg/L模拟地层水中,90天内能够保持较高强度；③堵水剂体系在高温120℃条件下,具有良好的长期热稳定性,90d后强度依然很高。 (3)进行了岩心物理模拟实验。①单岩心流动实验结果表明,堵水剂具有良好的注入性,对不同渗透率地层都具有较强的封堵能力,封堵率均大于98%；②封堵后的岩心经过30PV注入水冲刷后,岩心的封堵率减小幅度不大,封堵率仍大于97%,具有良好的耐冲刷能力；③双并联岩心实验结果表明,堵水剂具有良好的选择封堵性,能优先进入高渗层,对高渗层的封堵率大于98%。本文的研究成果为高温高盐油藏的堵水提供了理论依据和技术储备,具有一定指导意义和实际应用价值。
[Abstract]:In this paper, the research on high temperature and high salt reservoir is used to carry out the research of water plugging technology. The following contents are completed and the corresponding results have been achieved, which overcomes the defects of more components, short gelation time and poor stability.
(1) according to the characteristics and requirements of high temperature and high salt reservoir, a kind of local polymerizing gel plugging agent with low composition, easy pumping, adjustable glue time, high adhesive strength, strong plugging ability, temperature resistance, salt resistance and erosion resistance is developed, and the best composition of the water plugging agent system is determined.
(2) through the static evaluation of water plugging agent, the pH value range of water plugging agent was determined and the effect of temperature and salinity on the properties of plugging agent was investigated. (1) the water plugging agent system was better between the pH value 5.0-9.0 and the long-term stability; 2. The water plugging agent system was in the 25 x 104mg/L simulated formation water and 90 days internal energy. The water plugging agent system has good long-term thermal stability at high temperature of 120 C, and its strength is still very high after 90d.
(3) the core physical simulation experiment was carried out. (1) the experimental results of single core flow show that the plugging agent has good injectivity and has strong blocking ability to different permeability formations, and the blocking rate is more than 98%. After the core has been washed by 30PV injecting water, the blocking rate of core is less than 97%, and the blocking rate is still greater than 97%. The results of double parallel core test show that the water plugging agent has good selection and plugging ability, and it can enter high permeability layer with high permeability, and the sealing rate of high permeability layer is greater than 98%.
The research results in this paper provide theoretical basis and technical reserve for water plugging in high temperature and high salinity reservoirs, which has certain guiding significance and practical application value.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE358.3

【参考文献】