Experimental Study and Simulation of Different EOR Techniques in a Non-Fractured Carbonate Core from an Iranian Offshore Oil Reservoir

In this research the experimental and theoretical studies on different enhanced oilrecovery (eor) techniques, i.e. water flooding (wf), gas injection (gi) and water alternatinggas process (wag) were performed on specimens taken from an iranian carbonate offshorereservoir at the reservoir condition. the experimental results for each specified techniques werecompared with the corresponding results obtained from a simulation model. in the case of wf andgi, the injection rates were set to be 0.1, 0.2 and 0.5 cc/min while for the wag experiments, withtwo wag ratios 1 and 2 and with 7, 7, and 10 cycles, the injection rates were 0.1, 0.2 and 0.5cc/min. the results obtained from the experiments revealed that in all cases the amount ofrecovered oil is increased. furthermore, the results showed that increase in the recovery of oil issignificant in the case of the wag injection with optimum rate of injection fluids comparing to thoseof the wf and gi scenarios. it was also pronounced that the recovery of oil with wag ratio 2 ismore than that with ratio 1. it should be mentioned that samples for sea water and pure methanewere considered to be as injection fluids. it was also shown that the experimental results can beaccurately correlated with a black oil numerical simulator, eclipse100.