A Laboratory Study of Immiscible Hot WAG Injection in a Fractured Model

There are different techniques in order to enhanced oil recovery in the reservoirs and water alternative gas injection is an effective method for enhanced oil recovery. In this method slug of gas and water were injected into the reservoirs alternatively. The WAG process has been proved effective in providing mobility control for horizontal gas floods, as demonstrated by many field applications, most of them aimed at reaching miscibility between injected gas and the reservoir fluid. Immiscible WAG (IWAG), on the other hand, has a smaller record of field experience. The development of the Water-Alternating-Gas (WAG) process was aimed at improving flood profile control. The higher microscopic displacement efficiency of gas combined with the better macroscopic sweep efficiency of water significantly increases the incremental oil production over a plain water flood. This study deals with a new hot water alternative hot carbon dioxide injection as an EOR technique in a fractured sand pack and also compare it to the other current EOR methods. Hot water alternative hot carbon dioxide was used for the first time in this research and the results show that this method was more effective than other EOR methods.