There are significant heat loss,high water cut,and poor development effects during the recovery process of heavy oil reservoirs.Taking the Mackay River Reservoir in Canada as the research object,the numerical simula-tion model of hot solvent-assisted gravity drainage technology was constructed,and characteristics of SAGD,VAPEX,and hot solvent-assisted gravity drainage recovery were compared.The parameters are optimized for pro-duction pressures,injection rates,and injection temperatures of hot solvents.The results show that the hot solvent-assisted gravity drainage technology is better than SAGD and VAPEX in terms of injection and production differenti-al pressure,oil recovery,and oil recovery rate;in the actual development process,the optimal conditions for the application of hot solvent-assisted gravity drainage technology are as follows:the bottomhole production pressure is 700 kPa,the injection rate is 160 m3/d,and the injection temperature is 275℃.The results of the three-dimen-sional experiments further validate the results of the numerical simulation calculations.This study provides a refer-ence for efficiently developing shallow heavy oil reservoirs.
heavy oil recoverygravity drainageparameter optimizationnumerical simulationenhanced oil re-covery
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