Optimization of gas injection development parameters in carbonate reservoirs by numerical simulation

The fluid seepage in the carbonate fractured whole type reservoir is complicated. With the production, the effect of water injection is worse and the recovery rate is relatively low. In this paper, the studying after water flooding failure of fractured buggy reservoirs, the remaining oil is mainly located in the high position of fractured buggy bodies. The location of remaining oil can be exploited by gas injection. The combination of gas injection for oil exploitation and analysis of mechanism of factors and effect on the single well water injection for oil production practice feature,Through numerical simulation, the parameters of gas injection type, gas injection time and gas injection mode are optimized, To improve the development effect, the establishment of appropriate evaluation method of gas injection development.