连续混配用液态瓜胶的研究与应用

连续混配压裂施工工艺的运用越来越多,而满足其施工的增稠剂需具备溶胀时间短和容易计量的特点,因此通过对悬浮剂、表面活性剂和触变剂进行优选,确定悬浮剂为矿物油,表面活性剂为OP-10,触变剂为乙醇,开发出了液态瓜胶。结果表明,该液态瓜胶能够节约成本,减少残液的污染;具有良好的分散性,速溶性,能精确计量,能够实现连续混配压裂工艺;在3 min以内黏度释放率能达到80%以上,分散性好,无鱼眼。在苏里格地区的苏76-X井进行现场试验,取得良好应用效果。

Study and Application of Liquid Guar Gum Used in Continuous Mixing Fracturing

Liquid guar gum is developed for use in continuous mixing fracturing. Laboratory study shows that this liquid guar gum is cost effective and is less contaminant to the reservoirs in contact. The liquid guar gum has good dispersion capacity and is an instant polymer. The rate of addition of the liquid guar gum can be precisely controlled when mixing fracturing fluid. In the mixing process, the liquid guar gum can reach 80% of its viscosifying potential in just 5 min, and no “fish eyes” are found in the fluid mixed. This liquid guar gum has been successfully applied in the Well Su76-12-27X in Suligearea.