Título: | FLOW OF EMULSIONS IN POROUS MEDIA: EXPERIMENTS AND CAPILLARY NETWORK MODEL | ||||||||||||||||||||||||||||||||||||||||
Autor: |
MAO ILICH ROMERO VELASQUEZ |
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Colaborador(es): |
MARCIO DA SILVEIRA CARVALHO - Orientador VLADIMIR ALVARADO BASANTE - Coorientador |
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Catalogação: | 04/MAR/2010 | Língua(s): | PORTUGUESE - BRAZIL |
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Tipo: | TEXT | Subtipo: | THESIS | ||||||||||||||||||||||||||||||||||||||
Notas: |
[pt] Todos os dados constantes dos documentos são de inteira responsabilidade de seus autores. Os dados utilizados nas descrições dos documentos estão em conformidade com os sistemas da administração da PUC-Rio. [en] All data contained in the documents are the sole responsibility of the authors. The data used in the descriptions of the documents are in conformity with the systems of the administration of PUC-Rio. |
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Referência(s): |
[pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=15337&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=15337&idi=2 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.15337 | ||||||||||||||||||||||||||||||||||||||||
Resumo: | |||||||||||||||||||||||||||||||||||||||||
Objective: Transport of emulsions in porous media is relevant to several
subsurface applications. Many enhanced oil recovery processes involve emulsion
formation and their flow in some form. Modeling the flow of emulsion
in porous media is extremely challenging. The available descriptions based
on effective viscosity are not valid when the drop size is of the same order of
magnitude as the pore-throat size. In this case, drop straining and capturing
may partially block the pore passage and an accurate model should be able
to describe this local changes on mobility. The model developed in this work
is based on the flow rate-pressure drop relationship of emulsion flow through
constricted capillaries. A capillary network model is constructed in order to
obtain macroscopic parameters from upscaling of the microscopic behavior.
The results show how the permeability changes with Darcy velocity and
emulsion properties. At low flow rates, the large drops partially block the
smallest pores, leading to a low permeability. At high flow rates, the pressure
gradient in each capillary is strong enough to force the drops to flow
through the constrictions. Consequently, the permeability rises with capillary
number. A program, written in Fortram language, based on network
model is developed in this work to simulate the single phase and two phase
flow of emulsion through a porous medium. In the single phase model, the
results show good agreement with experimental measurements on samples
of sandstone. In the two phase model, the comparison of results between the
injection of the continuous phase of emulsion and the injection of emulsions
(with drops) on a network initially saturated with oil shows an increase in
the oil recovery factor and a more uniform displacement front in the case
of emulsion injection.
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