In view of the unclear influence of different oil saturation on the process and effect of fire flooding

the feasibility of fire flooding under different oil saturation was explored by using one-dimensional physical model device of fire flooding

and the experimental study on the influence of different oil saturation on gas injection adjustment and production effect of fire flooding was carried out. The experimental results show that the high temperature combustion can be realized when the oil saturation is above 15 %

but at this time

all the crude oil is converted into fuel for combustion. In the process of fire flooding

the greater the oil saturation is

the greater the oil wall is

and the greater the migration resistance is. It is necessary to continuously improve the gas injection speed to increase the driving force

resulting in the increase of model pressure with the increase of gas injection speed. With the increase of oil saturation

the displacement efficiency increases and the gas oil ratio decreases

indicating that the better the production effect is.