氧化石墨烯接枝黄原胶的制备和提升泡沫驱油研究  

Preparation of graphene oxide grafted xanthan gum and study on enhanced foam flooding

作　　者：王磊[1] 杨陆涛 钱国全[1] 时维才[1] 屈霜 姚峰[1] Wang Lei;Yang Lutao;Qian Guoquan;Shi Weicai;Qu Shuang;Yao Feng(Petroleum Engineering Technology Research Institute of Jiangsu Oilfield Company,SINOPEC,Yangzhou,255009,China;School of Chemistry and Materials Science,Nanjing Normal University,Nanjing,210023,China)

机构地区：[1]中国石化江苏油田分公司石油工程技术研究院,扬州225009 [2]南京师范大学化学与材料科学学院,南京210023

出　　处：《南京大学学报(自然科学版)》2025年第1期140-147,共8页Journal of Nanjing University(Natural Science)

基　　金：中国石化集团公司科技研发项目(P22180);中国石化江苏油田分公司科技研发项目(JS23035)

摘　　要：纳米材料具有良好的稳泡效果,材料经改性后能进一步提升泡沫性能,提高三次采油泡沫驱原油采收率.以氧化石墨烯(Graphene Oxide,GO)为基体,通过表面羧基化改性,利用乙二胺(Ethylenediamine,EDA)为桥梁,接枝具有耐盐和增黏效果的黄原胶(Xanthan Gum,XG)作为新型稳泡剂.通过FT-IR,XPS,Raman,TEM对不同改性阶段的材料的形貌、结构以及官能团进行表征分析.同时,考察了浓度、矿化度、pH对体系的影响.结果表明,和XG体系相比,新型稳泡剂的效果随着其浓度的增加而更加明显,还具有更好的抗盐性和pH稳定性.在85℃老化30 d后,新型稳泡剂损失13%,大幅减小了损失率.体系的界面张力值达到10-2,具有良好的界面性能.在85°C,4 MPa条件下,进行了双管驱替室内实验,结果表明,泡沫体系在高渗透岩心实现了封堵,改善了低渗透岩心的驱替效果,最终提高采收率达21.11%.Nanomaterials have good foam stabilizing effect.Through modification and synthesis,their foam performance can be further improved,and the oil recovery of tertiary oil recovery foam flooding can be improved.This article uses graphene oxide(GO)as the matrix,and through surface carboxylation modification,ethylenediamine(EDA)is used as a bridge to graft xanthan gum(XG)with salt resistance and viscosity increasing effects as a new foam stabilizer.The morphology,structure,and functional groups of materials at different modification stages were characterized and analyzed using FT⁃IR,XPS,Raman,and TEM.At the same time,the influence of concentration,salinity and pH on the system was investigated.The results showed that compared to the XG system,the new foam stabilizer had a more significant effect with increasing concentration,and had better salt and pH resistance performance.After aging at 85°C for 30 days,the stabilizer lost 13%,significantly reducing the loss rate.The interfacial tension value of the system reached the order of 10-2,indicating good interfacial performance.At 85℃and 4 MPa,the laboratory experiment of dual tube displacement was carried out.The results showed that the foam system has achieved plugging in high permeability cores,effectively improved the displacement effect of low permeability cores,and ultimately enhanced the oil recovery by 21.11%.

关 键 词：氧化石墨烯 黄原胶 稳泡 泡沫驱 提高采收率 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]