Optimization of injection-production parameters of CO2 huff and puff in tight reservoirs considering variable cycle gas injection and economic benefits

doi:10.3969/j.issn.1006-6535.2024.06.014

Abstract

Abstract: The oil exchange rate of CO₂ huff and puff decreases with the increase of CO₂ huff and puff cycle.In order 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.

Key words: tight reservoir, CO₂ huff, periodic gas injection, orthogonal experiment,economic evaluation

CLC Number:

TE348

Niu Zijing, Zhao Zhongjun, Zhang Yuan, Hu Jinghong. Optimization of injection-production parameters of CO₂ huff and puff in tight reservoirs considering variable cycle gas injection and economic benefits[J]. Special Oil & Gas Reservoirs, 2024, 31(6): 114-119.

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Optimization of injection-production parameters of CO₂ huff and puff in tight reservoirs considering variable cycle gas injection and economic benefits

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