Simulação numérica do escoamento bicomponente em reservatórios de baixa permeabilidade portadores de gás

Abstract

In recent decades, the interest of the scientific-technological community dedicated to the energy area has increased concerning the production and use of natural gas. In particular, have been made efforts to recover hydrocarbons from low-permeability reservoirs containing natural gas. In this context, we use numerical simulation of two-component single-phase flow in low permeability reservoirs to study the injection of carbon dioxide into formations containing methane, using fully implicit numerical formulations, a linearization, and a decomposition of operators. The effect of gas slippage on the flow, which can occur in these reservoirs, is also considered by introducing an apparent permeability, which varies as a function of the Knudsen number. We presented the results for flows in geometries of the type slab and a quarter of five-spot. We carried out an analysis of the influence of the variation of some of the numerical parameters, the physical properties of the fluid and the rock, and the operating conditions, and we concluded that the numerical methods provided results compatible with the flow dynamics.