Study On Dynamic Adjustment Of Fire-flooding Technology In Post-steam-injected Reservoir

In-situ Combustion(fire flooding)is one of important methods to improve recovery ratio of heavy oil,which belongs to the thermal recovery technology.It utilizing the reservoir itself heavy component burning as dynamic displacement of crude oil.The laboratory experiment shows that the residual oil saturation of the burned area is almost zero and the recovery rate can reach 85%-90%,and the recovery rate can reach 50%-80%.It started relatively late in our country,The initial research is limited to theoretical research,Through researching on Various techniques,fire flooding used for situ combustion in Liaohe Oilfield and Xinjiang Oilfield has entered a large-scale industrial application stage.Due to mechanism and stratigraphy is quite complicated,it is very important to formulate control measures accurately in the process of fire drive development to ensure stable and efficient operation of field production.This paper based on the pilot of fire flooding in Hongqian1 wellblock of Xinjiang Oilfield.Through analyzing in-situ combustion mechanism,study on characteristics of in-situ combustion,oil displacement mechanism,monitoring methods and dynamic control.Based on field test effect,discussed influencing factors of fire flooding;combined with the development characteristics of target reservoirs,studied on dynamic monitoring technology and dynamic control technology;according to monitoring results,it is proposed that the in-situ combustion adjusting control measures and the basis of the principle.The application and effect of monitoring and control technology in the experimental area are analyzed.Proposed that dynamic regulation system for production of fire flooding,which can be used for reference for the future industrialization.