Estudo teórico de injeção de espuma em meios porosos

Abstract

Theuseoffoamtocontrolthemobilityisapotentialtechniquethatimprovestheefficiency of the enhanced oil recovery. The properties of the foam are controlled by the dynamics of creation and destruction following the most used population balance models and models in local equilibrium. Under some assumptions, one-dimensional displacements, the fractional flow method. The surfactant as a component of the water phase is responsible for the foam generation e destruction. Some papers neglect this component for simplicity. In the present work the surfactant concentration is considered. Inthepresentworkthesurfactantphaseisconsideredinthemodelasseparatebalancelaw. The model is complete with mass balance equations of water, gas and the concentration of bubbles foam. The bubble generation and destruction is described by dynamic of the first order kinetic model. The mathematically study was based on ordinary differential equation tools and traveling waves analysis. For reasonable equilibrium conditions we study the existence of the traveling wave solution. For the particular case neglecting the capillary pressure, the existence was proved rigorously. For the general case numerical investigation was performed.