Título: | ADSORPTION BEHAVIOR OF COCAMIDOPROPYLBETAINE ON ANALOGOUS RESERVOIR ROCKS AT STATIC AND DYNAMIC CONDITIONS | ||||||||||||
Autor: |
PABLO ALBUQUERQUE GODOY |
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Colaborador(es): |
AURORA PEREZ GRAMATGES - Orientador JULIANA MARIA DA FONSECA FACANHA - Coorientador |
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Catalogação: | 12/SET/2023 | Língua(s): | ENGLISH - UNITED STATES |
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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=63932&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=63932&idi=2 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.63932 | ||||||||||||
Resumo: | |||||||||||||
The use of zwitterionic surfactants in enhanced oil recovery projects is
limited to adsorption on the surface of the reservoir rock, which must be predicted
to determine the economic feasibility of these projects. However, there is a lack of
models capable of estimating this adsorption and explaining the involved
mechanisms. The objective of this study was to provide models that could estimate
the adsorption of a zwitterionic surfactant (CAPB) and explain its adsorption
mechanisms. Experiments were conducted on carbonate and sandstone rocks using
static tests with particulate rock and dynamic tests within rock cores. A
methodology was developed to quantify CAPB in brine using high-performance
liquid chromatography. As a distinguishing feature, the adsorption was normalized
by the specific surface area of the rock, determined through BET analysis (static
tests) and microtomography with (micro)CT-scan (dynamic tests). The results were
interpreted with empirical and theoretical models integrated with surface potential
estimates. For carbonate, it was observed that the first layer of adsorption follows a
homogeneous pattern, limited by electrostatic repulsion with the surface, while the
second layer follows heterogeneous adsorption, forming surfactant aggregates
mediated by hydrophobic interactions between the tails. For sandstone, both layers
exhibit a heterogeneous distribution, explaining the higher adsorption between the
two rocks. It was concluded that bilayer models are capable of reliably explaining
and estimating adsorption under flow conditions, and the surface area was the most
relevant factor in the difference of dynamic adsorption between rocks, favored in
sandstone.
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