石油钻采工艺2017，Vol.39Issue(5)：617-622,6.DOI:10.13639/j.odpt.2017.05.016
新型Gemini表面活性剂复合清洁压裂液体系
A new compounded clean fracturing system based on Gemini surfactant
摘要
Abstract
This paper is aimed at building up a new compounded clean fracturing system of low damage. After cationic Gemini surfactant was synthesized, a new compounded clean fracturing system based on Gemini surfactant was developed by combining non-ionic surfactant with organic salt additive. Then, its performance was evaluated in laboratory. It is shown that after this fracturing system is sheared at 170 s-1under 120 ℃ for 90 min, it is better in temperature and shear resistance and its viscosity is still kept at about 90 mPa·s. Its elasticity is still higher in the case of lower viscosity, so it can satisfy the demand of proppant carrying. After this fracturing system is set under the air temperature for 90 d, its viscosity is nearly constant, indicating good stability. Its viscosity is lower than 5.0 mPa?s after gel breaking for 20 min by kerosene and formation water. And it is indicated that the gel breaking of this fracturing system is fast and thorough. The interfacial tension of gel breakers is 0.416 mN/m and 0.605 mN/m, respectively, which are favorable for the backflow of fracturing gel breaker. After gel breaking by kerosene and formation water, their damage ratios to natural cores are 8.71% and 12.02%, respectively, presenting the characteristic of low damage. This new type of compounded clean fracturing system based on Gemini surfactant is applied on site in Well CZ-22. It is shown that after the fracturing, the daily oil production of Well CZ-22 is four times that of its neighboring unfractured well (Well CZ-21). It is demonstrated that the fracturing stimulation effect of this fracturing fluid system is remarkable.关键词
Gemini表面活性剂/复合清洁压裂液/耐温抗剪切/低伤害/增产效果Key words
Gemini surfactant/compounded clean fracturing fluid/temperature and shear resistance/low damage/stimulation effect分类
能源科技引用本文复制引用
杨浩珑,李龙,向祖平,袁迎中..新型Gemini表面活性剂复合清洁压裂液体系[J].石油钻采工艺,2017,39(5):617-622,6.基金项目
中国石油科技创新基金项目"基于裂缝变形机理的页岩气藏体积压裂水平井流体流动规律研究"(编号：2015D-5006-0207). （编号：2015D-5006-0207）
