摘要
针对吐哈油田英2井侏罗系七克台组深层稠油油藏的地质特征和在开发过程中存在的问题,通过对天然气、氮气、二氧化碳等3种气体进行注气吞吐降黏实验研究,评价3种气体的降黏效果及混溶稠油的PVT性质变化规律,优选出最佳的注入气源。实验及研究结果表明,3种注入气源均具有一定的降黏效果,其中二氧化碳的降黏效果最好。同时,指出气体的溶解降黏、弹性驱动及携带、超临界萃取等作用是提高深层稠油油藏原油采收率的最主要机理。
In view of the geologic feature and development problems of deep heavy oil reservoir of Jurassic Qiketai formation in Ying-2 Well in Tuha oilfield,this paper conducts the visbreaking experiment study by gas(natural gas,nitrogen and carbon dioxide) injection stimulation process,evaluates the visbreaking effects and PVT variations of their mixed viscous oil of such three gases and selects the optimal gas for stimulation.The results show that the three gases are all of certain effects for visbreaking,among which carbon dioxide is the best for it.Also,the most important mechanisms for enhancing oil recovery of deep heavy oil reservoir are the dissolved viscosity reduction,elastic driving and carrying effect and supercritical fluid extraction of the gases.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2012年第1期108-110,共3页
Xinjiang Petroleum Geology
关键词
吐哈盆地
英2井
稠油油藏
注气
降黏
实验
Tuha basin
Ying-2 Well
heavy oil reservoir
gas injection
visbreaking
experiment
作者简介
妥宏（1972-），男，回族，甘肃张家川人，高级工程师，在渎硕士研究生，石油工程，（Tel）0990-6868054（E—mail）thong@petrochina．com．cn
