黏弹性表面活性剂用作煤层压裂液性能研究  

STUDY ON VISCOELASTIC SURFACTANT (VES) SYSTEM USED AS COAL-BED FRACTURING FLUID

作　　者：董波[1] 李圣涛[2] 杨兴渝[3] 罗陶涛 

机构地区：[1]中石化西南油气分公司工程监督中心 [2]西南油气田分公司采气工程研究院 [3]新疆油田分公司采油工艺研究院 [4]川庆钻探工程公司钻采院

出　　处：《钻采工艺》2010年第4期94-96,共3页Drilling & Production Technology

摘　　要：采用压汞仪对晋城煤样进行结构分析,该地区煤样属于低渗透双孔介质模型,煤样结构分选差,煤层割理仅占20%左右;并针对该地区煤层的特点研制了黏弹性表面活性剂体系作为压裂液,实验结果表明,该体系具有较高的黏弹性,悬浮能力强,破胶后黏度低,返排率高,煤样的渗透率恢复可达78%以上。The pore structure of Jingcheng coal sample was ana-lyzed by using mercury injection apparatus. The results showed that the coal sample belongs to low permeability and diplopore medium model,the separation of coal sample pore structure was poor,and coal cleat occupies only 20% for whole porous. According to the fea-tures of Jingcheng coal bed,a viscoelastic surfactant (VES) system used as fracturing fluid was developed. The experimental results showed that the system had higher viscoelasticity,stronger suspen-ding power,low viscosity after gel breaking and high flow back rate,and the coal sample permeability restoration was more than 78%.

关 键 词：煤样结构 进汞曲线 黏弹性 表面活性剂 压裂液 

分 类 号：TD842[矿业工程—煤矿开采]