高温高盐油藏凝胶体系研究及性能评价  

Development and performance evaluation of gel system for high temperature and high salt oil reservoirs

作　　者：方丽 付美龙[1,2] 黎旭东 魏菊艳 陈立峰 FANG Li;FU Meilong;LI Xudong;WEI Juyan;CHEN Lifeng(School of Petroleum Engineering,Yangtze University,Wuhan 430100,China;Hubei Key Laboratory of Oil and Gas Drilling and Production Engineering,Yangtze University,Wuhan 430100,China)

机构地区：[1]长江大学石油工程学院,湖北武汉430100 [2]长江大学油气钻采工程湖北省重点实验室,湖北武汉430100

出　　处：《石油化工》2024年第1期68-76,共9页Petrochemical Technology

基　　金：国家自然科学基金项目(52004038)。

摘　　要：针对油藏高温高盐状况,研制了耐高温高盐油藏的AS-1凝胶体系和XJ-1凝胶体系,考察了两种凝胶体系的耐温性、热稳定性、耐盐性及驱油效率等。实验结果表明,AS-1凝胶体系的最优配方为0.4%(w)AS-1聚合物、0.5%(w)乌洛托品、0.3%(w)对苯二酚、0.02%(w)硫脲、0.02%(w)羟基乙叉二膦酸(HEDP),XJ-1凝胶体系的最优配方为0.5%(w)XJ-1聚合物、0.7%(w)聚乙烯亚胺、0.02%(w)硫脲、0.02%(w)HEDP。两种凝胶体系在150℃、矿化度1.1×10^(5) mg/L条件下老化10 d脱水率分别为4%,6%;在126℃、矿化度1.1×10^(5) mg/L条件下老化60 d体系黏度保留率分别为94.2%,94.5%。在最佳段塞注入量0.6 PV、126℃条件下候凝时间为24 h时,两种凝胶体系的封堵率分别为95.5%,96.1%,总采收率分别达到了71.8%,72.5%。In view of the high temperature and high salt condition of the reservoir,AS-1 gel system and XJ-1 gel system,which were resistant to high temperature and high salt reservoir,were developed.The two gel systems were investigated for their temperature resistance,thermal stability,salt resistance,and oil repellent efficiency.The experimental results show that the optimal formulations are as follows:0.4%(w)AS-1 polymer,0.5%(w)urotropin,0.3%(w)hydroquinone,0.02%(w)thiourea,0.02%(w)hydroxyethylidene diphosphonic acid(HEDP)for AS-1 gel system,and 0.5%(w)XJ-1 polymer,0.7%(w)polyethylene imine,0.02%(w)thiourea,and 0.02%(w)HEDP for XJ-1 gel system.The dehydration rate of the two gel systems is 4%and 6%respectively after 10 d of aging at 150℃and 1.1×10^(5) mg/L of total salinity,and the viscosity retention rate of the two systems is 94.2%and 94.5%respectively after 60 d of aging at 126℃and 1.1×10^(5) mg/L of total salinity.When the optimal segment slug injection volume is 0.6 PV and the waiting time is 24 h at 126℃,the plugging rate of the two gel systems is 95.5%and 96.1%,and the total recovery efficiency reaches 71.8%and 72.5%,respectively.

关 键 词：耐温性 抗盐性 凝胶 封堵 性能评价 采收率 

分 类 号：TQ423[化学工程]