Simulação numérica de escoamentos não-isotérmicos em reservatórios do tipo shale gas

Abstract

In this study, the Finite Volume Method was applied to model non-isothermal flow in shale gas reservoirs, taking into account the effects of adsorption and slip. The investigation addressed flow behavior when using static heaters for enhanced recovery. The model developed incorporated variations in absolute permeability with temperature and in the volume of adsorbed gas with changes in temperature and pressure. The numerical approach adopted was formulated in a completely implicit manner, with linearization using the Picard Method and resolution of the system of linearized discrete equations using the Conjugated Gradients Method. Analysis of the results allowed us to understand the effects of slip and adsorption on the flow of shale gas in different natural gas production scenarios, including discussions on the behavior of the production flow under pressure prescribed in the producing well. This research contributes to a better understanding of the processes involved in non-isothermal flow in shale gas reservoirs, providing important insights for optimizing production and developing recovery strategies.