Keywords boron/guar gelling fracturing fluids;gel breakdown;non-degrading mechanisms;gel breakers;slowly releasing acids;crosslinking control;backflow;

• 硼/瓜尔胶冻胶压裂液;冻胶破胶;非降解性机理;破胶剂;缓释酸;交联程度控制;压裂液返排;