ZHANG Y Y, WANG X, SUN X F, et al.Research on development characteristics and influencing factors of non-condensable gas assisted SAGD for Canadian oil sand[J].Journal of Henan Polytechnic University(Natural Science) ,2023,42(3):10-17.

doi:10.16186/j.cnki.1673-9787.2021090020

Received:2021/09/06

Revised:2022/01/20

Published:2023/05/25

Research on development characteristics and influencing factors of non-condensable gas assisted SAGD for Canadian oil sand

ZHANG Yanyu1, WANG Xin1, SUN Xiaofei1, WANG Chengsheng2, SUN Jun2, REN Shuliang2

1.School of Petroleum Engineering，China University of Petroleum（East China），Qingdao  266500，Shandong，China;2.Drilling＆Production Engineering Institute，China National Offshore Oil Corporation，Tianjin  300452，China

Abstract:Conventional SAGD steam overlap phenomenon is serious，steam chamber development is uneven，and development effect is poor.Non-condensable gas assisted SAGD（steam and gas push，SAGP）technology can effectively improve the SAGD development effect.However，SAGP technical mechanism，development characteristics and influencing factors are still not completely clear.A combination of laboratory experiments and numerical simulations was used to reveal the SAGP technical mechanism，to clarify development characteristics such as steam chamber development and remaining oil distribution，and to clarify the influence of non-condensable gas types，injection methods，injection timing and other factors.The results showed that non-condensable gas could reduce the viscosity of heavy oil and the heat loss rate at the top of the reservoir，thereby improving the flow ability of heavy oil and the efficiency of steam heat utilization.The auxiliary effect of using carbon dioxide in the SAGP process was better than that of methane and nitrogen.Injecting non-condensable gas as soon as possible could form an elliptical steam chamber to avoid steam overlap.When the injection rate of non-condensable gas was 4 000 m³/d，the effect was best，exceeding this value would inhibit the development of the steam chamber；The effect of slug injection of non-condensate gas was better than continuous injection，and the optimal slug length was 2 months.The research results were of great significance for the efficient SAGP development of in Canadian oil sand.

Key words:Canadian oil sand;steam assisted gravity drainage;non-condensable gas;numerical simulation;technical mechanism;development characteristics

加拿大油砂非凝析气体辅助SAGD开采特征及影响因素研究_张艳玉.pdf