压裂用瓜胶用杀菌剂筛选与作用效果评价

Screening and Evaluation of Bactericide for Guar Gum using in Fracturing Fluid

油田压裂液稠化剂主要是植物胶,由于受到微生物的降解,天然植物胶极易发生降解、解黏和发霉等问题。本研究通过对4类杀菌剂及复配杀菌剂对瓜胶原液黏度保持作用的对比,评价了其杀菌效果。结果表明,0.5%的丙烯醛、0.5%脲醛、0.5%1,4-对苯二酚、0.1%水解植物酚、0.9﹪生理盐水及0.9%Na Cl与0.5%丙烯醛的复配杀菌剂具有较显著的抑制瓜胶降解的作用,在杀菌处理4d时,0.5%瓜胶原液的黏度降低率均低于16%。

Plant gum was the main viscosifier in oil field fracturing fluid. The plant gum degraded and mildewed easily, and the vis- cosity of its solution decreased correspondingly. In this work, the efficiency of the bactericides was evaluated by the viscosity main- taining. The results showed that 0.5% acrolein, 0.5% urea formaldehyde, 0.5% 1,4-hydroquinone, hydrolyzed plant phenol, 0.9% saline and 0.9% NaCl ＆ 0.5% acrolein could inhibit the degradation of guar gum, and the viscosity of 0.5% guar gum solution only decreased by less than 16% within 4d.