摘要
基于一步法构建了一种新型AM/AMPS类耐高温抗高盐萘酚凝胶流道调整体系,交联剂为双羟基萘,有别于传统的苯酚类交联剂。该体系于140℃下处理1 d,以目测代码法表征成胶强度达到H;高温高盐(140℃,22×10~4mg/L)处理150d之后,体系出现一定的脱水现象,但脱水率仅为4.6%。相比普通苯酚类交联体系,该体系具有超优良的耐温抗盐性。基于岩心流动实验对体系封堵性能进行了评价,堵水率为99.82%,堵油率为4.55%,可见体系具有优良的油水选择性。采用微观可视化模型进行封堵机理研究,结果表明:体系会优先封堵优势通道,达到液流转向的目的,同时液流在优势通道中遇到流道调整体系的阻碍作用,会对堵剂条带形成一定的挤压,使得堵剂条带缓慢前移,从而进一步提高原油采收率。
Using bishydroxynaphthalene as crosslinking agent,a novel AM/AMPS high temperature and high salt-resistant naphthol gel flow path adjustment system was synthesized by one-step method.The experimental results showed that the gel strength reached H level by visual code method after the optimal system was treated at 140℃for 1 day.After 150 days of high temperature and high salinity treatment(140℃,22×10~4 mg/L),the system had certain dehydration phenomenon,but the dehydration rate was only 4.6%.Compared with the common phenol cross-linking system,the system had excellent temperature and salt resistance.The plugging performance was evaluated based on the core flow experiment.The water shutoff rate was 99.82%and the oil blocking rate was 4.55%.The system showed excellent oil-water selectivity.Based on the microscopic visualization model,the plugging mechanism was studied.The results showed that the system preferentially blocked the dominant channel,achieving the purpose of liquid flow steering.At the same time,when the liquid flow encountered the obstruction of the flow channel adjustment system in the dominant channel,a certain pressing action was formed for the blocking agent strip,so that the strip of the plugging agent moved forward slowly,thereby further enhancing the oil recovery.
作者
何龙
武俊文
刘广燕
李亮
张汝生
侯宝峰
HE Long;WU Jun-wen;LIU Guang-yan;LI Liang;ZHANG Ru-sheng;HOU Bao-feng(Petrotechnical Engineering Research Institute,Sinopec Northwest Oilfield Company/Sinopec Key Laboratory of Enhanced Recovery of Fracture-cave Reservoir,Xinjiang Urumqi 830011,China;Sinopec Petroleum Exploration and Development Research Institute,Beijing 100083,China;College of Petroleum Engineering,Yangtze University,Hubei Wuhan 430100,China)
出处
《当代化工》
CAS
2020年第5期777-781,785,共6页
Contemporary Chemical Industry
基金
国家自然科学基金,纳米颗粒协同阳-非离子Gemini表活剂润湿反转体系的构筑及其机理研究(51704036)
国家重大科技专项,缝洞型油藏堵调及靶向酸压工艺技术(2016ZX05014-005)
关键词
萘酚凝胶
耐温抗盐
油水选择性
流道调整
微观可视化
Naphthol gel
Temperature and salt resistance
Oil-water selectivity
Flow path adjustment
Microscopic visualization
作者简介
何龙(1980-),2009年毕业于中国石油大学(华东),获应用油气田开发专业博士学位,主要从事调剖堵水及三次采油方面工作。E-mail:hel.xbsj@sinopec.com
