石油钻采工艺2025，Vol.47Issue(3)：317-328,12.DOI:10.13639/j.odpt.202504016
裂缝性碳酸盐岩凝析气藏衰竭式开发注气补能优化技术
Optimization of gas injection and energy replenishment for depletion development of fractured carbonate condensate gas reservoirs
杨心怡 1刘伟 1谭强 1朱玉磊 2李柯1
作者信息
- 1. 中国石油大学(北京)石油工程学院,北京 102249
- 2. 中海石油(中国)有限公司天津分公司,天津 300452
- 折叠
摘要
Abstract
During the depletion-based development of fractured carbonate reservoirs for condensate gas production,the decline in reservoir pressure and the complex fluid phases are prone to induce reverse condensation,stress sensitivity,and well wall instability.Reasonable gas injection replenishment can effectively maintain the formation pressure.Therefore,experiments on the mechanics and properties of fractured carbonate reservoirs in a certain block of Xinjiang were carried out.Based on this,a component mechanism model of the reservoir numerical simulation for the target reservoir was constructed,and the research on the pressure variation laws was conducted.From the aspects of maintaining well wall stability and increasing production capacity,single-well gas injection production replenishment optimization research for condensate gas reservoirs was carried out.The results show that the reservoir in this block exhibits significant stress sensitivity characteristics.The increase in confining pressure results in a permeability reduction ranging from 73.26%to 79.46%,and causes a 5.35%to 16.62%loss in production capacity.During the depletion-based development process,the decline in production capacity is mainly caused by reverse condensation and the deterioration of permeability induced by stress sensitivity.The numerical simulation results show that gas injection replenishment development under typical working conditions can effectively increase the production of condensate oil and gas,with an increase of up to 2.80%and 15.66%respectively.The optimization results indicate that the best oil production effect is achieved when gas injection is carried out at a gas injection rate slightly above the dew point pressure and in multiple cycles(with each injection stage lasting 3 months)at a gas injection speed of 40×104 m3/d.This research provides theoretical basis and technical support for the optimization of development schemes for similar fractured carbonate reservoirs for condensate gas production.关键词
裂缝性碳酸盐岩/凝析气藏/衰竭式开采/井壁稳定/应力敏感/露点压力/注气补能优化Key words
fractured carbonate rock/condensate gas reservoir/depletion development/well stability/stress sensitivity/dew point pressure/optimization of gas injection and energy supplement分类
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杨心怡,刘伟,谭强,朱玉磊,李柯..裂缝性碳酸盐岩凝析气藏衰竭式开发注气补能优化技术[J].石油钻采工艺,2025,47(3):317-328,12.
