Experiments on Influence of Secondary Water Bodies on Fire Flooding Development Effect

doi:10.3969/j.issn.1006-6535.2024.02.014

Abstract

Abstract: Aiming at the problem that the influence of secondary water body generated by steam injection development on fire flooding development effect is still unclear, a combustion tube experimental device was used, and oil sands of different water content were filled into the middle part of the combustion tube to simulate the secondary water body in the reservoir, and to study the influence of the secondary water body on the propagation characteristics of the fireline and the fire flooding development effect. The results show that the secondary water body is favorable for increasing the propulsion velocity of the fireline but would reduce the combustion stability of the fireline. It is difficult for the fireline to advance stably to the production well after passing through the secondary water body when the water saturation of the secondary water body is higher than 75.4%, which leads to a poor development effect; the secondary water body with water saturation lower than 50.0% and a certain amount of oil content does not have much influence on the fire flooding development effect. The fireline could pass through the secondary water body and advance stably. The study results are of great significance to understanding the influence of secondary water bodies in the reservoir on the stable advancement of the fireline and the fire flooding development effect. They could provide theoretical references for the fire flooding technology in steam injection reservoirs.

Key words: heavy oil reservoir, in-situ combustion, secondary water body, combustion stability, fireline advance velocity

CLC Number:

TE357.44

Sun Ziqi, Zhao Renbao, Wang Tiantian, Long Haiqing, Huang Tian, Chen Changjian. Experiments on Influence of Secondary Water Bodies on Fire Flooding Development Effect[J]. Special Oil & Gas Reservoirs, 2024, 31(2): 120-128.

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