耐高温清洁压裂液的制备与性能研究

Preparation and Performance Evaluation of Cleaning Fracturing Fluid with High Temperature Resistance

郭 辉 庄玉伟 褚艳红 曹 健 赵根锁 张国宝

GUO Hui，ZHUANG Yuwei，CHU Yanhong， CAO Jian， ZHAO Gensuo， ZHANG Guobao

为获得耐温性良好的压裂液体系， 以硬脂酸、 草酸、 4-氨基-N， N-二甲基苯胺、 N， N'-二氨基乙基乙二胺、 1， 3-二氯-2-丙醇为原料合成双子表面活性剂， 以其作为稠化剂与氯化铵水溶液混合制得清洁压裂液， 考察了该压裂液的耐温性、 耐剪切性、 携砂性和破胶性等。结果表明， 与胍胶压裂液相比， 该清洁压裂液耐温耐剪切性能好，120℃时的表观黏度为 88 mPa· s， 满足高温油气田的使用要求； 携砂性能好， 120℃时石英砂在压裂液中的沉降速度为 0.79 mm/s； 与地层水的配伍性良好； 在压裂液中加入煤油即可自动破胶， 无需加入破胶剂， 便于使用。图4表2参11

In order to obtain fracturing fluid with high temperature resistance，a gemini surfactant was synthesized with stearic acid，oxalic acid，N， N-dimethylbenzene-1， 4-diamine，N， N'-（ethane-1， 2-diyl） diethane-1， 2-diamine and 1， 3-dichloro-2-propanol as the materials. Using this gemini surfactant as viscosifier，a cleaning fracturing fluid was prepared by mixing ammonium chloride solution and gemini surfactant. The performance of cleaning fracturing fluid（3% gemini surfactant+1% NH4C1），such as heat and shear resistance，sand-carrying property，gel-breaking property and so on，was investigated. The results showed that comparing with guargum fracturing fluid，this cleaning fracturing fluid was thermally stable and had good temperature and shear resistance. The viscosity of cleaning fracturing fluid was 88 mPa·s at 120℃，which could meet the requirement of high temperature oil and gas field. The sedimentation rate of seed in cleaning fracturing fluid was 0.79 mm/s at 120℃ ，which indicated that the cleaning fracturing fluid had a good sand-carrying performance. The compatibility between cleaning fracturing fluid and formation fluid was good. The cleaning fracturing fluids would break automatically when it encountered lamp kerosene，without adding gel breaker， which was very convenient to use.

10.19346./j.cnki.1000-4092.2017.04.005