Hydroxypropyl guar gum was prepared based on the reaction of guar gum and propylene oxide.The value of molar substitution was 0.32 and the proportion of two sorts single sugar was 1∶1.67 determined by （）1H-NMR.（）...Hydroxypropyl guar gum was prepared based on the reaction of guar gum and propylene oxide.The value of molar substitution was 0.32 and the proportion of two sorts single sugar was 1∶1.67 determined by （）1H-NMR.（）13C-NMR can be used to assume the connection between guar gum and Hydroxypropyl and evaluate the length of hydroxypropyl which was 2～8.展开更多
为提高稠化剂的抗温性,以羟丙基瓜胶、2-吡咯烷酮和(2-氯乙基)三甲基氯化铵为原料,合成了新型改性羟丙基瓜胶稠化剂。采用TGA进行了抗温性能评价,研究了稠化剂的交联条件以及压裂液的耐温耐剪切性能、破胶性能、残渣含量和岩心伤害评价...为提高稠化剂的抗温性,以羟丙基瓜胶、2-吡咯烷酮和(2-氯乙基)三甲基氯化铵为原料,合成了新型改性羟丙基瓜胶稠化剂。采用TGA进行了抗温性能评价,研究了稠化剂的交联条件以及压裂液的耐温耐剪切性能、破胶性能、残渣含量和岩心伤害评价等。结果表明,羟丙基瓜胶通过引入刚性基团改性后,热降解温度提高到了220℃,在0.6%的加量下增黏效果好。压裂液体系优选配方为:0.6%改性羟丙基瓜胶+0.5%高温防膨剂BZGCY-C-FP+0.5%高温助排剂BZGCYC-ZP+0.1%温度稳定剂BZGCY-Y-WD+0.2%碳酸钠+清水+有机硼锆交联剂BH-GWJL(交联比为100∶0.4),在200℃、170 s^(-1)下剪切120 min后黏度保持在60 m Pa·s以上,提高了稳定性。现场应用效果表明,该体系能够满足高温井施工要求。展开更多
文摘Hydroxypropyl guar gum was prepared based on the reaction of guar gum and propylene oxide.The value of molar substitution was 0.32 and the proportion of two sorts single sugar was 1∶1.67 determined by （）1H-NMR.（）13C-NMR can be used to assume the connection between guar gum and Hydroxypropyl and evaluate the length of hydroxypropyl which was 2～8.
文摘为提高稠化剂的抗温性,以羟丙基瓜胶、2-吡咯烷酮和(2-氯乙基)三甲基氯化铵为原料,合成了新型改性羟丙基瓜胶稠化剂。采用TGA进行了抗温性能评价,研究了稠化剂的交联条件以及压裂液的耐温耐剪切性能、破胶性能、残渣含量和岩心伤害评价等。结果表明,羟丙基瓜胶通过引入刚性基团改性后,热降解温度提高到了220℃,在0.6%的加量下增黏效果好。压裂液体系优选配方为:0.6%改性羟丙基瓜胶+0.5%高温防膨剂BZGCY-C-FP+0.5%高温助排剂BZGCYC-ZP+0.1%温度稳定剂BZGCY-Y-WD+0.2%碳酸钠+清水+有机硼锆交联剂BH-GWJL(交联比为100∶0.4),在200℃、170 s^(-1)下剪切120 min后黏度保持在60 m Pa·s以上,提高了稳定性。现场应用效果表明,该体系能够满足高温井施工要求。
