Abstract: Heavy oil reservoirs in Liaohe Oilfield have the characteristics of deep burial depth and multiple oil types. In order to explore the effective replacement technology in the later stage of steam injection in heavy oil reservoirs, through indoor physical simulation and field tests, the feasibility of fire flooding after stem flooding was discussed in different types of reservoirs, such as middle to deep or extra deep layered reservoir, thick massive reservoir, water-flooded heavy oil reservoir, and shallow low-permeability heavy oil reservoir. A series of technologies aiming at different types of reservoirs was formed, which include reservoir description technology for fire flooding, indoor physical simulation technology, reservoir engineering design technology, oil production technology, development effect evaluation technology, etc. The recovery degree of the reservoirs after fire flooding had been greatly improved, effectively alleviating the decline in production. The paper discussed the exploration history of fire flooding technology in Liaohe Oilfield, and systematically summarized the supporting technologies of fire flooding for developing different types of oil reservoirs. The research results can provide a reference for the fire flooding development of Liaohe Oilfield and for the similar heavy oil reservoirs.

Key words: fire flooding, reservoir description, reservoir engineering, oil production technology, Liaohe Oilfield