深层低渗稠油油藏降黏剂驱剩余油分布规律及智能识别应用  

Residual Oil Distribution Pattern of Viscosity-reducing Flooding in Heavy Oil Reservoirs with Deep Low Permeability and Application of Intelligent Identification

作　　者：马瑞 王庆魁 季岭 王飞 李春雷 孙建 周松 李想 MA Rui;WANG Qing-kui;JI Ling;WANG Fei;LI Chun-lei;SUN Jian;ZHOU Song;LI Xiang(Third Oil Recovery Factory,PetroChina Dagang Oilfield Company,Cangzhou 061000,China;College of Petroleum Engineering,China University of Petroleum,Beijing 102249,China)

机构地区：[1]中国石油大港油田第三采油厂,沧州061000 [2]中国石油大学(北京)石油工程学院,北京102249

出　　处：《科学技术与工程》2025年第4期1412-1418,共7页Science Technology and Engineering

基　　金：国家自然科学基金企业创新发展联合基金(U20B6003)。

摘　　要：针对大港油田官128区块低渗透稠油油藏高含水低采出程度的问题,通过室内实验研究降黏剂驱的微观渗流规律和剩余油特征,借助AI智能识别定量分析平面波及特征和剩余油分布规律。实验结果表明:降黏剂乳化原油后,乳状液聚并可封堵水驱窜流通道,油滴的优势运移通道增加,提高波及系数,降低含油饱和度。AI图像识别出孔喉滴状油、壁面膜状油、死角残余油和未波及片状油等剩余油分布类型,并分析其形成机理,提出加注表面活性剂和加密井网,调剖封堵高渗通道的措施。加入降黏剂体系能降低启动压力梯度,提高稠油流动性。水驱转化学驱后,提高了孔隙、喉道中剩余油和死角残余油的洗油效果,采收率提高15.28%。研究成果为低渗透稠油油藏水驱开发后期注降黏剂高效增油机理研究和现场应用提供重要理论借鉴。Aiming at the problem of high water content and low degree of recovery of low permeability heavy oil reservoir in Guan128 block of Dagang Oilfield,the microscopic seepage law and residual oil characteristics of viscosity reducers flooding were studied through indoor experiments,and the planar wave and characteristics and residual oil distribution law were quantitatively analysed with the help of AI intelligent recognition.The experimental results show that after the viscosity reducer emulsification of crude oil,the emulsion aggregates and can block the water-driven flux channels,the advantageous transport channels of oil droplets increase,improve the wave and reach coefficient,and reduce the oil saturation.AI image identified pore throat droplets of oil,the wall membrane oil,the residual oil in the dead corner and the residual oil without wave and flake oil and other types of residual oil distribution,and the formation mechanism was analyzed,and measures of surfactants injection and encryption of the network of wells were put forward,and the blocking of high seepage channels was adjusted.Adding viscosity-reducing agent system can reduce the starting pressure gradient and improve the fluidity of heavy oil.After the conversion of water drive to chemical drive,the oil washing effect of residual oil in the pores and throat and residual oil in the dead space is improved,and the recovery rate is increased by 15.28%.The research results provide important theoretical reference for the research on the mechanism of efficient oil enhancement and field application of viscosity-reducing agent injection in the late stage of water-drive development of low-permeability heavy oil reservoirs.

关 键 词：稠油 降黏剂 渗流特征 剩余油 图像识别 

分 类 号：TE357[石油与天然气工程—油气田开发工程]