Experimental Analysis of Spontaneous Imbibition in Naturally Fractured Gas Reservoirs

Spontaneous imbibition (SI) is an important production mechanism in fractured reservoirs. Efforts have been made to study the interaction between the matrix and fractures in a situation where saturated matrixes are surrounded by gas saturated fractures. Despite previous studies on the scaling groups introduced to characterize the imbibition process in oil reservoirs, gas reservoirs have been less considered. In this research, by studying the process of imbibition and the factors and conditions affecting this process, spontaneous test experiments were designed and implemented in specific conditions. By analyzing the data obtained from the experimental study and scaling the data, the spontaneous imbibition process in gas reservoirs has been investigated, and the capability of previously proposed scaling groups for scaling spontaneous imbibition data in gas systems, has been studied. Based on the results, it is necessary that SI and its affecting factors be more accurately studied in order to provide a more acquire scaling equation.