文章摘要
聚(苯乙烯-丙烯酰胺)核壳型微球破胶剂的制备 与缓释效果*
Preparation and Sustained Release Effect of Poly(Styrene-acrylamide)Core-shell Microsphere Breaker
  
DOI:10.19346/j.cnki.1000-4092.2020.02.004
中文关键词: 核壳型  微球  压裂液  破胶剂  缓释
英文关键词: core-shell type  microsphere  fracturing fluid  gel breaker  sustained release
基金项目:国家自然科学基金“纳米微球缔合成胶的新型低伤害压裂液研制”(项目编号51504215),河北省高等学校科学技术研究项目 “高固含量的异电荷聚合物纳米微球复合乳液制备和应用基础研究”(项目编号ZC2016097),燕山大学博士基金“高含蜡原 油析蜡特征分析和井筒结蜡厚度模拟”(项目编号B951)。
作者单位
李光辉,未九森,李晓丹,吴振豪 (燕山大学石油工程系河北 秦皇岛 066004) 
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中文摘要:
      压裂液延迟破胶在压裂施工中具有重要的意义。基于核壳型微球对药物的缓释机理,通过反相微乳液聚 合制备了内部包覆过硫酸铵破胶剂的聚(苯乙烯-丙烯酰胺)核壳型微球。在聚丙烯酰胺溶液中加入微球或过硫 酸铵后置于80℃干燥箱中,通过测定不同静置时间下溶液的黏度和pH值,评价微球的缓释效果。结果表明,微 球直径为50~100 nm。微球通过吸水膨胀使过硫酸铵破胶剂缓慢释放到聚合物溶液中,延缓了破胶剂对聚合物 溶液黏度和pH值的影响,有效抑制了聚丙烯酰胺的自由基降解和氧化降解。图8参15
英文摘要:
      The delayed fracturing of fracturing fluid is of great significance in fracturing construction. Based on the sustained release mechanism of core-shell microspheres for drugs,poly (styrene-acrylamide) core-shell microsphere with internal coating ammonium persulfate breaker was prepared by inverse microemulsion polymerization. The polyacrylamide solution adding microsphere or ammonium persulfate was placed in a drying cabinet at 80℃. The sustained release effect of the microsphere was evaluated by measuring the viscosity and pH value of the solution under different standing time. The results showed that the diameter of the microsphere was 50—100 nm. The ammonium persulfate breaker slowly released into the polymer solution after water swelling of microsphere,which delayed the influence of breaker on the viscosity and pH value of polymer solution,and effectively inhibited the free radical degradation and oxidative degradation of polyacrylamide.
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