新型有机胺硼交联剂AB-1的合成及应用

The Synthesis and Application of New Organic Amine Boron Crosslinker AB-1

摘要:

以硼酸、正丁醇、乙二醇和四乙烯五胺为原料制备出一种针对多羟基醇压裂液体系的新型有机胺硼交联剂AB-1，确定了交联剂的最佳合成工艺，并考察了制备有机胺硼交联剂的影响因素。研究结果表明：第一步酯化反应，硼砂质量分数15%，乙二醇35%，正丁醇25%，在120℃下反应1h；第二步络合反应，四乙烯五胺10%，季戊四醇5%，氢氧化钠5~10%，在150℃下、反应时间2h，得到交联剂AB-1。压裂液性能评价结果表明：交联剂AB-1与羟丙基胍胶CJ2-6交联产生的冻胶具有良好的延缓交联性能、耐温抗剪切性能、悬砂性能和破胶性能。

Abstract:

Based on the raw material boric acid, n-butyl alcohol, ethylene alcohol and tetraethylenepentamine, one kind of new organic amine boron crosslinker AB-1 is prepared to specify to hydroxyl alcohols fracturing fluid system. The optimal synthesis progress of crosslinker is determined, and some influence factors of the synthesis progress are also studied. The results have proved that: the first step--esterfication reaction, the mass fraction of boron acid is 15%, ethylene alcohol is 35%, n-butyl alcohol is 25%, under 120℃ for one hour; the second step--complexation reaction, tetraethylenepentamine is 10%, pentaerythritol is 5%, sodium hydroxide is 5~10%, under 150℃ for two hours; then crosslinker AB-1 is collected. The behavior evaluation results of fracturing fluid have proved that: hydroxypropal guar gum can be crosslinked with crosslink agent AB-1 with favorable delay crosslinking behavior, shear and temperature resistance behavior, solid-carrying behavior and gel breaking behavior.