CO_(2)驱微粒运移堵塞机理及解堵技术研究  

Research on the Mechanism of Particle Migration Blockage and Blocking Removal Technology in CO_(2)Flooding

作　　者：魏振国[1] 裴铁民[1] 陈义发[1] 贾喻博 张利乐 Wei Zhenguo;Pei Tiemin;Chen Yifa;Jia Yubo;Zhang Lile(The Second Oil Production Plant of Sinopec Henan Oilfield Company,Nanyang 473400)

机构地区：[1]中石化河南油田分公司采油二厂,河南南阳473400

出　　处：《石化技术》2023年第10期161-163,共3页Petrochemical Industry Technology

摘　　要：针对物性差油藏注水困难的问题,通过开展CO_(2)驱微粒运移堵塞规律及有机垢解堵实验,优化CO_(2)驱油技术。实验结果表明:CO_(2)驱引起无机垢、有机垢和微粒积聚成团堵塞,导致储层渗流能力变差,岩心渗透率损失65.1%;经过甲苯和无水乙醇清洗后,储层渗流能力有所恢复,岩心渗透率恢复47.2%;CO_(2)驱油过程中通过加注甲苯等可解决有机垢的问题,同时也可以减小由于微粒运移和微粒积聚成团引起的地层堵塞,该研究对于注水井解堵与降压增注具有指导意义。In response to the difficulty of water injection in reservoirs with poor physical properties,CO_(2)flooding technology was optimized by conducting experiments on particle migration and organic scale blockage removal in CO_(2)flooding.The experimental results show that CO_(2)flooding causes the accumulation of inorganic scale,organic scale,and particles to form clumps and block,leading to a decrease in reservoir permeability and a loss of 65.1%in core permeability;After cleaning with toluene and anhydrous ethanol,the permeability of the reservoir was restored,and the core permeability was restored by 47.2%;During CO_(2)flooding,the problem of organic scale can be solved by adding toluene and other additives,while also reducing formation blockage caused by particle migration and accumulation.This study has guiding significance for unblocking water injection wells and increasing injection pressure.

关 键 词：CO_(2)驱 微粒运移 解堵 降压增注 

分 类 号：TE357.7[石油与天然气工程—油气田开发工程]