Experimental study on feasibility of fire flooding and optimization of operation parameters in heavy oil reservoir with edge and bottom water——by taking J91 block of Liaohe oilfield as an example

In order to solve the problems of complex water invasion, low recovery degree and difficult to greatly enhance oil recovery at the end of huff and puff development, by taking block J91 of Liaohe oilfield as an example, the feasibility of fire flooding development of heavy oil reservoir with edge and bottom water was verified from the perspective of heat and fuel by TG-DSC and indoor physical simulation, and the optimization of operation parameters was studied experimentally. The results show that the stable high temperature oxidation combustion can be achieved by fire flooding development of heavy oil reservoir with edge and bottom water, and the lower limit of fuel oil saturation is 35%. Electric ignition is recommended for the ignition of heavy oil reservoir with edge and bottom water by increasing the ignition temperature and prolonging the ignition time. In the process of displacement, variable speed gas injection is used to increase the temperature of the front edge of the fire line to ensure the stable advancement of the fire line. The study can provide a good technical guidance for the implementation of fire flooding development technology in similar reservoirs.