摘要
为降低稠油油藏注水井注水压力,以表面活性剂和纳米聚硅材料为主要处理剂,通过大量室内实验研制出了一种表面改性降压增注体系,组成为0.5%季铵盐阳离子双子表面活性剂HAS-1+0.03%纳米聚硅材料NPS-L+0.5%防膨剂JCL-2。研究了该降压增注体系的稳定性和界面性能,考察了体系的润湿反转性能以及降压增注效果。研究结果表明,优选的表面改性降压增注体系具有良好的稳定性和界面性能,在60℃下静置50 d后,体系油水界面张力稳定在10-3m N/m数量级。体系具有良好的润湿反转能力,使用加入表面改性降压增注液饱和的岩心接触角从46.5°增大到134.5°,使亲水表面转变为疏水表面。岩心驱替实验结果表明,注入表面改性降压增注体系3 PV后,后续水驱压力降低40%,降压效果明显。
In order to reduce the pressure of water injection wells in heavy oil reservoir, with surfactant and nan- ometer polysilicon as the main agent, through a large number of indoor experiment a surface modification decompression and augmented injection system were developed, surfactant HAS-1 ＋0. 03% nano poly silicon material the formula is 0. 5% quaternary ammonium cationic gemini NPS-L ＋ 0. 5% anti swelling agent JCL-2. The stability and interfacial properties of the system were studied, and the wettability and reverse performance of the system were investigated. Research results show that the optimization of surface modification decompression and augmented injection system has good stability and interfacial properties and under 60℃ standing for 50 days after, the oil-water interracial tension of the system stability in 10-3 mN/m. The system has good wettability reversal ability ,by the addi- tion of the surface modification of decompression and augmented injection liquid saturated core contact angle from 46.5 degrees increased to 134.5 degrees, to transform a hydrophilic surface into a hydrophobic surface. The core displacement experiment results showed that after injection 3 PV of the surface modification decompression and augmented injection system, the pressure of water flooding was decreased by 40%, and the effect was obvious.
出处
《科学技术与工程》
北大核心
2016年第28期70-74,共5页
Science Technology and Engineering
关键词
稠油油藏
注水井
降压增注
表面改性
纳米聚硅
heavy oil reservoir water injection well decompression and augmented injection surface modification nanometer polysilicon
