特种油气藏2024，Vol.31Issue(1)：48-56,9.DOI:10.3969/j.issn.1006-6535.2024.01.006
低黏原油辅助气体吞吐稠油开采技术室内实验和技术界限
Indoor Experiment and Technical Boundary of Heavy Reservoir with Gas Huff and Puff Assisted by Low-Viscosity Oil Injection
摘要
Abstract
In the late stage of steam huff and puff or steam flooding for the heavy oil reservoir,the oil-steam ratio is only 0.1 to 0.2,which leads to high energy consumption and carbon emissions.To address the issue,a recovery method that utilizes low-viscosity oil injection assisted heavy reservoir with gas huff and puff has been proposed to improve the development effect.Through indoor test and reservoir numerical simulation,the mechanism and appli-cability are studied,and the technical boundary are delimited.The study shows that the mechanism of heavy reser-voir with gas huff and puff assisted by low-viscosity oil injection is mainly viscosity reduction by dilution,solution gas drive,swept volume expansion and facies change by emulsification.The oil-carrying rate(volume ratio of pro-duced heavy oil to injected low-viscosity oil)can reach 1.00-3.00,and the energy consumption and the water production is low.The new method is suitable for conventional heavy oil reservoirs and extra-heavy oil reservoirs,especially for deep zones,thin interbedded and small fault blocks.This study has guiding significance for reservoir screening and engineering design of heavy reservoir with gas huff and puff assisted by low-viscosity oil injection.关键词
低黏原油/气体/吞吐/稠油/低碳/带油率Key words
low viscosity oil/gas/huff and puff/heavy oil/low carbon/oil-carrying rate分类
石油、天然气工程引用本文复制引用
户昶昊..低黏原油辅助气体吞吐稠油开采技术室内实验和技术界限[J].特种油气藏,2024,31(1):48-56,9.基金项目
中国石油科技专项"稠油大幅度提高采收率关键技术研究"(2023ZZ23) （2023ZZ23）
