引用本文:
【打印本页】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览次   下载 本文二维码信息
码上扫一扫!
分享到: 微信 更多
Relationship between air volume and oil-recovery mechanism for light oil air injection process
REN Shao-ran1,YANG Chang-hua1,2,HOU Sheng-ming1,3,LIU Yin-hua4,LIN Wei-min2
(1. College of Petroleum Engineering in China University of Petroleum, Qingdao 266580,China ;2. Oil Production Engineering Technology Institute, Zhongyuan Oilfield Branch Company, SiNOPEC,Puyang 457001,China;3. Industry and Information Technology Department of Hainan Province, Haihou 570204,China.;4. PetroChina Coaibed Methane Company Limited,Beijing 100028, China)
Abstract:
The relationship between volume of air injected and oil-recovery mechanism for a light oil air injection process (L0A1) was studied through a series of laboratory experiments and numerical simulation including slim-tube tests, sand-pack displacement tests and numerical simulation of an adiabatic reaction process of LOAI. Based on the experimental and numeri cal simulation results and in comparison with other gas injection processes, a theoretical curve was given, which could be used for predicting the oil-recovery factor as a function of volume of air injected for oil displacement experiment under typical light-oil reservoir conditions. The results show that LOAI process may have different mechanUius during different injection stages related to the volumes of air injected. Up to 0.5Vp(porous volume) of air is injected (before gas breakthrough),the prevail oil recovery mechanism is flue gas driving,which is an immiscible gas flooding process. When the injected volume of air is over 0.5 Vp( afifter gas breakthrough), the combination of flue gas driving and the thermal effect induced by the oxidation may become an important oil recovery mechanism. Finally,thermal effect may become the dominate oil recovery mechanism when the thermal front approaches oil producers.
Key words:  light oil reservoir  air injection  oil recovery mechanisms  thermal front  oxygen consumption