摘要
现有调驱体系在中低渗透油藏中存在堵得住走不远或走得远堵不住的技术难题。文章通过高温高压熔融法,利用表面活性剂作为分散稳定剂,制备了适用于中低渗油藏深部调驱的纳米级树脂颗粒分散体(OSR);以驱替压力为指标,利用岩心驱替实验系统评价了OSR在中低渗透多孔介质中的注入性能和封堵能力。研究结果表明,OSR具有良好的注入性能及封堵能力。随着OSR中树脂含量的增大,注入压力有所增加,但仍处于较低水平。当树脂含量为5%时,OSR在不同渗透率岩心中均具有良好的注入性能,注入1 PV的OSR,最大注入压力小于0.25 MPa。OSR对岩心的封堵率随着树脂含量的增大而提高,当树脂含量超过5%后封堵率变化不再显著。在固定树脂含量为5%的情况下,OSR对岩心的封堵率随岩心渗透率的降低而提高,OSR对渗透率小于30×10^(-3)μm^(2)岩心的封堵率达90%以上。此外,OSR在不同渗透率岩心中均表现出良好的耐冲刷性能。
The Existing mobility control systems face technical challenges in medium-to-low permeability reservoirs,such as blocking effectively but unable to travel far,or traveling far without adequate blocking.In this paper,the nano-scale resin particle dispersions(OSR)suitable for deep mobility control in medium-to-low permeability reservoirs were prepared via a high-temperature and high-pressure melting method,using surfactants as dispersing stabilizers.The injection performance and plugging ability of OSR in medium-low permeability porous media were systematically evaluated by core displacement experiment with displacement pressure as index.The experimental results indicated that OSR exhibited good injection performance and plugging ability.As the resin concentration in OSR increased,the injection pressure of OSR also increased,but remained at a relatively low level.When the resin content in OSR was 5%,it demonstrated good injection performance in the cores with different permeability,with the maximum injection pressure of less than 0.25 MPa for injecting 1 PV of OSR.As the resin content increased,the plugging efficiency of OSR improved,but after the resin content exceeded 5%,the change in plugging efficiency became negligible.At a fixed resin content of 5%,the plugging efficiency increased as the permeability of the core decreased,with a plugging efficiency of over 90%for cores with a permeability of less than 30×10^(-3)μm^(2).Furthermore,OSR demonstrated good erosion resistance in the cores with different permeabilities.
作者
钱志鸿
余晓玲
王磊
朱杰
戴志鹏
张贵才
QIAN Zhihong;YU Xiaoling;WANG Lei;ZHU Jie;DAI Zhipeng;ZHANG Guicai(Jiangsu Oilfield Branch Company,Sinopec,Yangzhou,Jiangsu 225000,P R of China;School of Petroleum Engineering,China University of Petroleum(East China),Qingdao,Shandong 266580,P R of China;Key Laboratory of Unconventional Oil&Gas Development(China University of Petroleum(East China)),Ministry of Education,Qingdao,Shandong 266580,P R of China)
出处
《油田化学》
北大核心
2025年第2期269-274,322,共7页
Oilfield Chemistry
关键词
纳米树脂颗粒分散体
深部调驱
注入性能
封堵能力
nano-scale resin particle dispersion
deep profile control
injection performance
plugging capability
作者简介
钱志鸿(1984-),男,副研究员,中国石油大学(华东)应用化学专业学士(2007),研究方向为油田化学,E-mail:qianzh.jsyt@sinopec.com;通信联系人:张贵才(1966-),男,教授,西南石油学院石油工程专业博士(2005),从事化学驱理论与方法、油田化学品开发与应用技术等方面的研究,通信地址:266580山东省青岛市黄岛区长江西路66号中国石油大学(华东)石油工程学院,E-mail:zhanggc@upc.edu.cn。
