Título: | ANALYSIS OF EMULSION FLOW THROUGH POROUS MEDIA USING CAPILLARY NETWORK MODEL | ||||||||||||||||||||||||||||||||||||
Autor: |
GIOVANE BARROSO LIMA NOGUEIRA |
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Colaborador(es): |
MARCIO DA SILVEIRA CARVALHO - Orientador VLADIMIR ALVARADO BASANTE - Coorientador |
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Catalogação: | 19/AGO/2011 | 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=18104&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=18104&idi=2 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.18104 | ||||||||||||||||||||||||||||||||||||
Resumo: | |||||||||||||||||||||||||||||||||||||
Emulsions can be used as mobility control agents in different enhanced oil
recovery and carbon storage methods in oil reservoirs. The application of this
technique, with the correct choice of the injected emulsion characteristics and the
determination of optimal operating conditions, requires an adequate understanding
of the emulsion flow in porous media. The macroscopic characteristics of the
emulsion flow through porous media are directly linked to the two-phase flow at
the pore scale. Capillary network models allow the implementation of the drop
flow mechanisms in the pore throats and the determination of macroscopic flow
parameters. In this work, emulsion flow in porous media is analyzed through an
unstructured 3D dynamic network model. The pressure distribution, and
consequently the flow rate in each capillary of the network, isdetermined by mass
balance equation in each pore. The effects of the drops of dispersed phase in the
flow behavior within each element of the network is described by a flow blocking
factor based on experimental results on emulsion flow through single
microcapillary tubes with throats. The blocking factor describes the changes in the
conductivity of each element and it is a function of the throat geometry, the size
and volumetric concentration of the dispersed phase and the local capillary
number. The concentration distribution of the dispersed phase along the network
is described by a mass transport equation, allowing the study of the filtration
process of the drops in the pores and the analysis of the alternate injection of
water and emulsion.Time integration in the dynamic model is performed by a
semi-implicit method and the non-linear system of equations obtained in each
time step is solved by an iterative method. The results illustrate the evolution of
the permeability reduction and the effluent concentration of drops as a function of
the drops size, injection flow rate, concentration of the injected emulsion and
injected volume of emulsion. The analysis of the emulsion/water alternate
injection clearly shows the pore blockage by the emulsion drops and the change in
the flow pattern after the reinjection of water.
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