CO_(2)驱油用增稠剂体系研究现状及展望  

Research status and prospects of thickener systems for CO_(2)enhanced oil recovery

作　　者：高亚慧 宫汝祥 郑玉飞[1,2,3] 周秀玲 朱彤宇[1,2,3] 薄振宇 柏溢 GAO Yahui;GONG Ruxiang;ZHENG Yufei;ZHOU Xiuling;ZHU Tongyu;BO Zhenyu;BAI Yi(National Key Laboratory of Offshore Oil and Gas Exploitation,Beijing 102209,China;Key Laboratory of Offshore Oil Exploitation Enterprise of Difficult-to-reach Reserves,Tianjin 300459,China;Production Optimization Business Division of China Oilfield Service Limited,Tianjin 300459,China;Shandong Haili Intelligent Technology Co.,Ltd,Dongying,Shandong 257000,China)

机构地区：[1]海洋油气高效开发全国重点实验室,北京102209 [2]天津市海洋石油难动用储量开采重点实验室,天津300459 [3]中海油田服务股份有限公司油田生产事业部,天津300459 [4]山东海励智能科技有限公司,山东东营257000

出　　处：《世界石油工业》2024年第5期56-64,共9页World Petroleum Industry

基　　金：国家重点研发计划项目“CO_(2)驱油及封存安全监测技术”(2023YFB4104200);中海油田服务股份有限公司直管项目“海上CCUS关键技术研究(二期)”(E-232370001)。

摘　　要：CO_(2)驱油技术(CO_(2)-EOR)能够在提高原油采收率的同时,将部分CO_(2)封存于地质体中,是一项“双赢”的技术。但由于原油与CO_(2)之间黏度相差较大以及油藏的非均质性,CO_(2)驱油过程极易发生气窜,气窜后CO_(2)驱油产量明显降低,在CO_(2)中加入增稠剂提高CO_(2)黏度是解决气窜问题最直接有效的方法。综述了目前国内外用于增稠CO_(2)的聚合物,即含氟类、硅氧烷类、碳氢类以及含氧烃类聚合物,对现有聚合物CO_(2)增稠剂的研究效果和其优缺点进行了对比分析。分析认为,在增稠CO_(2)提高CO_(2)驱油效率的研究和现场应用中,首选碳氢类和含氧烃类聚合物CO_(2)增稠剂,并总结得出有效的聚合物增稠剂应具备亲CO_(2)疏水基团和增稠基团、无规聚合、平均分子量为6000~15000的分子结构。目前尚未有兼具有效、经济和环保的CO_(2)增稠剂产品,因此设计和合成价格更便宜、无氟、无毒、环保、高可溶性的CO_(2)增稠剂是未来的研究方向。CO_(2)enhanced oil recovery(CO_(2)-EOR)technology not only can improve oil recovery,but also can store the part of CO_(2)in the geological,which is a“double win”technology.However,due to the large viscosity difference between oil and CO_(2)and the heterogeneity of oil reservoirs,gas channeling occurs easily during CO_(2)flooding.It can significantly reduce the oil recovery of CO_(2)flooding.To solve this problem,the CO_(2)viscosity can be enhanced by using CO_(2)thickeners in the CO_(2)phase,which is the most direct and effective method.In this work,the polymers that used to thicken CO_(2)at home and abroad were reviewed,including fluorinated polymers,siloxane polymers,hydrocarbon polymers and oxygenated hydrocarbon polymers.By comparing and analyzing the research results and the advantages and disadvantages of existing polymer thickeners,it was found that the hydrocarbon and oxygenated hydrocarbon polymer thickeners are preferred in the research and application for enhanced CO_(2)viscosity to improve CO_(2)flooding efficiency.Furthermore,the effective polymer thickeners should have a molecular structure of CO_(2)-philic group and thickening group,atactic polymers,and an average molecular weight of 6000~15000.At present,an effective,affordable and environmentally friendly CO_(2)thickeners has not been found,so the future research studies on CO_(2)thickeners must focus on designing and synthesizing less expensive,fluoride free,non-toxic,environmentally friendly and highly soluble CO_(2)thickeners.

关 键 词：CO_(2)驱油 气窜 增稠剂 聚合物 分子结构 

分 类 号：TE341[石油与天然气工程—油气田开发工程]