低浓度胍胶压裂液有机硼交联剂YJ-P的合成与应用

The synthesis and application of organic boron crosslinker YJ-P for low concentration of guanidine gum fracturing fluids

摘要:

该文通过考察压裂液的悬砂时间（Time）确定了合成反应中硼砂用量,配位剂组分比例,溶剂组分比例对有机硼交联剂YJ-P交联低浓度胍胶压裂液携砂性能的影响，并通过动态流变研究压裂体系的粘弹性。结果表明,硼砂用量25%，配位剂质量比m（葡萄糖）:m（乙二醇）为1:1.5，溶剂丙三醇与水的 比例为6:1，交联剂用量为1.2%时，悬砂性能最优，悬砂时间达到了27 min•mm-1。确定反应时间为4.0h，反应温度80℃，改性有机硼交联剂对低浓度胍胶压裂液有良好的悬砂性.当胍胶的有效浓度达到0.2%，剪切频率增加，动态模量增加，在频率达到10rad/s时，G'＞G"且 G'＞0.1Pa，压裂液有较好的粘弹性。

Abstract:

：Through investigating the proppant-carring time (Time) of the fracturing fluid,the optimal content of borax, complexing agent, solvent to prepare the organic boron crosslinker YJ-P had been ditermined.In addition,viscoelastic property of the fracturing system had studied by the dynamic rheology . The results showed that, when borax content was 25%, compound complexing agent ratio (m (glucose) : m (MEG)) was1:1.5, ratio of glycerol to water was 6:1 and content of crosslinking agent was 1.2% with low concentration of guanidine gum fracturing fluids, the fracturing system had the optimal proppant-carring performance, the proppant-carring time reached 27 min•mm-1.When the reaction time was determined as 4.0 h, reaction temperature as 80 ℃, the optimal proppant-carring capability of modified organic boron crosslinking agent on the low concentration guanidine gum fracturing fluid had shown up. When minimum effective concentration of guanidine gum reached 0.2%, the dynamic modulus increased with the growth of angular frequency.When the angular frequency was up to 10 rad.s- 1, the G '> G "and G' > 0.1 Pa. The fracturing fluid had optimal viscoelasticity.