摘要：The Guantao Formation in Block 83 ofShanjiasi Oilfield is a heavy oil reservoir.Thecurrent main production method is mostly thermaloil production,but the thickness of the formationbarrier is large and the heat loss is high,whichaffects the development effect.In this study,the useof heavy oil activated water instead of hot water canmake up for the poor displacement efficiency of asingle hot water and increase the recovery factor ofheavy oil reservoirs in conjunction with heating.Inthis paper,the viscosity reduction performance,interface performance and long-temthermalstability of three new types of heavy oil activatedwater are evaluated,and the best heavy oil activatedwater system is selected.The influence of theconcentration and temperature of heavy oil activatedwater on the viscosity reduction performance of thesystem is studied.Sand-packingtube floodingex periments are used to study the effect of heavy oilactivated hot water floodingat_ differenttemperatures to enhance oil recovery.The resultsshow that XD-1 heavy oil activated water has thebest viscosity reduction performance,and theviscosity reduction effect decreases with the increaseof temperature.When its concentration is 3000ppm,the viscosity reduction effect is better.Increasing theconcentration could reduce the viscosity reductionrate.The enhanced oil recovery value of heavy oilactivated water flooding increases with the increaseof temperature,but the efficiency of the heavy oilactivated water becomes worse.The highestefficiency at 60°C is 32.6%,and the highest value at80°cis 10.73%.
关键词：Heavy oil activated wa ter;viscosity reduction;themalstability;interfacial tension;enhanced oil recovery
