压裂液温度稳定剂的评价方法设计和应用

Design and application of the evaluation method for fracturing fluid temperature stabilizer

为考察温度稳定剂对压裂液耐温性能的提升效果,设计从上限温度开始通过数值搜索方法逐步确定最高温度T_(max)(η_0,t_0)计算温度稳定剂对压裂液适用温度的提高值ΔT_(max)(η_0,t_0)的方法;通过实验分析两种压裂液温度稳定剂对有机硼交联羟丙基瓜胶压裂液的作用效果。结果表明:加入0.1%~0.8%的温度稳定剂S-1、S-2分别可以使得压裂液的最高适用温度提高4.5~10℃、6~14℃;所设计的评价方法可以判别不同压裂液温度稳定剂产品的作用效果差异。

In order to evaluate the improving effect of the temperature stabilizer on the temperature resistance properties of fracturing fluid,one method was designed,in which the highest temperature T_(max)( η_0,t_0) was determined gradually using the numerical search method starting from the upper limit temperature,and the increased value of applicable temperature ΔT_(max)( η_0,t_0) for temperature stabilizer was calculated. The improving effects of two temperature stabilizers for organic boron crosslinked hydroxypropyl guar gum fracturing fluid were analyzed experimentally. It is found that the T_(max)( η_0,t_0) of fracturing fluid increases 4. 5-10 ℃ and 6-14 ℃ by the addition of 0. 1%-0. 8% temperature stabilizer S-1 and S-2,respectively. Hence,the designed evaluation method is able to distinguish the performance of different temperature stabilizers.