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以硼酸为原料，在NaOH催化作用下与乙二醇和三乙醇胺进行络合反应制备了压裂液用有机硼交联剂。研究了反应时间、反应温度、硼酸和乙二醇用量对有机硼交联剂延迟交联时间和所形成压裂液冻胶耐温性的影响，以及催化剂用量对交联剂稳定性的影响。确定了最佳反应条件：反应时间4h，温度1200C，三乙醇胺53．4％，硼酸21．4％，乙二醇17．2％，NaOH加量1．7％。室内评价了压裂液的配伍性及其性能，结果表明：各助剂的配伍性良好，在70℃、75℃和170s^-1下剪切60min的压裂液黏度分别为105、115mPa·s，耐剪切性能良好。压裂液在120min内可破胶，破胶150min的黏度小于5mPa·s，破胶后的残渣含量为5．18％；破胶液的表界面张力较低，分别为25．42mN／m和1．16mN／m。压裂液在70℃时的滤失系数为4．57×10^-4m／min^1/2，对储层的伤害较小，适用于低渗透油田。在延长油田7口井使用该压裂液，施工顺利，返排效果良好。图2表8参3“,”A bororganic crosslinker for water base hydro-fracturing gelling fluid （HFGF） was prepared by boric acid, ethylene glycol and triethanolamine with sodium hydroxide as catalyst. The effect of reaction time, reaction temperature, the amounts of boric acid and glycol on the properties of product in crosslinking time and HFGF crosslinked in heat resistant was studied. Meanwhile, the effect of catalyst amount on the property of bororganic crosslinker in storage stability was discussed. The optimum reaction condition of bororganic crosslinker was obtained as follows： 4 h reaction time, 120℃ reaction temperature, 53.4% triethanolamine, 21.4% boric acid, 17.2% ethylene glycol and 1.7% NaOH. The evaluation results in laboratory showed that the compatibility between chemical additives was good. When HFGF was sheared at 170 s^-1 for 60 min, the viscosity of it was of 105 mPa·s at 70℃ and 115 mPa＇s at 75℃. The HFGF with bororganic crosslinker synthesized could break within 120 min. The gel-breaking liquid viscosity was less than 5 mPa·s in 150 min, and the residue content of the fluid was less than 5.18%. The surface tension and interfacial tension of the gelbreaking liquid was of 25.42 mN/m and 1.16 raN/m, respectively. The filtrate loss of the fluid was low with filtration coefficient of 4. 57 × 10^-4 m/min^1/2 at 70℃. The fracturing fluid reduced the damage to the reservoir and applied to low permeability oilfield. HFGF was used in 7 production wells of Yanchang oilfield, and the application effect was excellent on the process of fracturing and flowback.