ALVES, H. G.; http://lattes.cnpq.br/4857065531411440; ALVES, Helton Gomes.
Résumé:
The present work aims to contribute to the understanding of the involved phenomena in
the recovery of oils with different viscosities through horizontal wells in the presence
and absence of a geological fault via water injection. In order to solve the mass
conservation and generalized linear momentum equations of Darcy's law, Ansys CFX
15.1 has been used and it was supported by the continuous fluids mixture model
(water/oil) in transient flow and laminar regime. Through mesh test, which was
performed according to the principle of superposition of the volumetric fraction profile
and the average surface velocity of the water, a structured mesh with 603588 hexahedral
elements was chosen because of the lower computational effort. However, by
comparing the recovery of oil with different viscosities, it was possible to verify that the
recovery of less viscous oil was more efficient. In addition, according to the analysis of
the influence of the height of the injector well, the configuration that presented a larger
awept área was the one with a greater area of injection. Thus, through the distributions
in different longitudinal positions of volumetric fraction of the water, pressure
gradients, surface velocity of the water and the oil, it was possible to realize the
presence of the geological fault in the reservoir, as well as the influence of the variation
of its permeability.
