Multiphase Flow in Naturally Fractured Reservoirs: Comparison of Matrix-Fracture Shape Factor and Transfer Function

The first part is the comparison of shape factor by using dimensionless terms and second part is comparison of transfer function. In the first part, the influence of different shape factors is represented in dimensionless pressure and dimensionless time. A new correlation is derived to relate these dimensionless terms with matrix-fracture transfer rate. This comparison summarizes that the effect of shape factors can be generalized by defining the rate of change of matrix-fracture transfer. In the second part, comparison of transfer function is done by using a reservoir test problems from Sixth SPE Comparison Project. Comparison of transfer function showed that direct generalization from single phase to multiphase is insufficient for modeling matrix-fracture transfer rate. It also demonstrates the imbibition terms should be considered in transfer function.