Optimization of injection-production parameters of CO2 huff and puff in tight reservoirs considering variable cycle gas injection and economic benefits
The oil exchange rate of CO2 huff and puff decreases with the increase of CO2 huff and puff cycle.In or-der to improve the rate,the numerical simulation method is used to optimize the injection-production parameters of CO2 huff and puff with variable injection time,and the economic evaluation is carried out.The results show that the cumulative oil production of the cyclic gas injection scheme is 32 983.4 m3,and the oil change rate reach to 1.11,which is higher than the optimal scheme of orthogonal experiment.The economic evaluation results show that the CO2 huff and puff scheme with variable cycle gas injection has the best economic benefits,with a net present value of 345.07×104 yuan and an internal rate of return of 18.06%.The research results can provide theoretical guidance for the efficient development of CO2 huff and puff in tight reservoirs.
tight reservoirCO2 huffperiodic gas injectionorthogonal experimenteconomic evaluation
国家科技期刊平台
NSTL
万方数据
