氢键型自愈合树脂稳砂体系

基于氢键型自愈合树脂构建具备重复聚砂性能的水乳液型稳砂体系,以渗透率保留率和出砂临界流量为指标,考察乳液稳砂性能.结果表明:在130℃条件下,向填砂模型中注入1VP(VP为孔隙体积)乳液稳砂剂并养护12 h,砂柱液测渗透率保留率约为76.3％,出砂临界流量大幅度提升至110 mL/min,连续顶替100VP后,平均出砂...

Sand consolidation system based on hydrogen-bonding self-healing resin

Sand consolidation emulsion with re-agglomeration property was prepared based on the hydrogen-bonding self-healing resin.Sand consolidation property was then evaluated using regained permeability and the critical sand free rate.It is shown that the regained permeability is about 76.3%and the critical sand free rate could be prominently increased to 110 mL/min when 1V_P(V_P void content)emulsion sand stabilizer was injected in sand-packing model at 130℃for 12 hours.After continuously replacing 100 V_P,the average sand production rate reaches 0.08 g/L.Interaction force and re-agglomeration ability between modified quartz grains are strong.The adhesion force could be more than 90%of the original one after the contacting and separating process proceeded for three times.The electrostatic interaction and the dangling branched chains as well as the hydrogen bonding networks contribute to the aggregated intensity and the re-agglomeration of the sand grains.