Resulting and Comparison between Illustrations of non- Darcy flow in tight-gas reservoirs with fractured with Ordinary Reservoirs

Inertial non-Darcy flow effects can significantly lower the productivity of fractured gas wells. The effects were investigated numerically, taking into account inertial flow in the fracture and the reservoir. Simulationsare performed by means of a fully implicit in-house simulator. The non-Darcy flow implementation is based on an implicit treatment with relaxation of the non-Darcy control parameter. The simulation tool is applied to a synthetic production scenario in typical tight-gas wells for constant and stress-dependent parameters. Results suggest that non-Darcy flow effects will influence the productivity despite the relatively low gas rates. Regarding a realistic scenario, the total gas production is reduced by 21% to 40%. New type-curves arepresented for fracture and reservoir non-Darcy flow to identify the impact of reservoir non-Darcy flow and to facilitate the prediction of the performance of a fractured well. Technical contributions in this paper include (i) the illustration of stable and robust non-Darcy flow implementation in a fully-implicit reservoir simulationtool, (ii) unfolding the impact of inertial flow effects on a tight-gas well, and (iii) developing new type-curves accounting for non-Darcy flow in the reservoir and the fracture

کلیدواژه ها:

Darcy flow ، Fully implicit ، Non-Darcy ، Unfolding