自生气提高采收率技术研究进展

RESEARCH PROGRESS IN ENHANCED OIL RECOVERY TECHNOLOGY USING SELF GENERATED GAS

介绍了自生CO_(2)、自生N_(2)、自生混合气和过氧化物体系的产气机理。对叙述了自生气体系在气驱、调驱、增产增注和排水采气等提高采收率中的研究应用现状。自生混合气体系兼具多种气驱的效果,且产气量较大,极具应用前景。自生气体系兼具传统气驱的效果,能最大程度改善油藏的堵塞现象,并且安全可控,施工工艺较为简便,具有非常广阔的应用前景。指出未来的产气剂开发重点应侧重提高产气剂的产气量、降低产气剂的生产成本和控制产气速率3个方面。

The gas generating mechanism of several existing types of gas generating agents such as self-generated CO_(2),self-generated N_(2),self-generated mixed gas,and peroxide systems were analyzed.The results indicate that the self-generated mixed gas system has multiple gas drive effects and a large gas production rate,which has great application prospects.A survey was conducted on the current research and application status of self-generated gas systems in improving oil recovery,such as gas flooding,profile control flooding,stimulation and injection,and drainage gas recovery.The results of indoor research and on-site application have confirmed that the self-generated gas system combines the effects of traditional gas flooding,can maximize the improvement of reservoir blockage,and is safe and controllable.The construction process is relatively simple,and has very broad application prospects.It is pointed out that the gas generating agents will focus on three aspects in the future:increasing the gas generating rate of the agents,reducing the cost of gas generating agents,and controlling the gas generating rate.