Hyperbranched polyglycerols derivatives as cetyltrimethylammonium bromide nanocarriers on enhanced oil recovery processes

In this work, the efficiency of partially hydrophobized hyperbranched polyglycerols (HPG11 and HPG12) as cetyltrimethylammonium bromide (CTAB) carriers was evaluated to prevent surfactant losses by adsorption on reservoir rocks surface during enhanced oil recovery (EOR) processes. Interactions betwe...

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Published in:Journal of applied polymer science 2022-03, Vol.139 (9), p.n/a
Main Authors: Ferreira, Conny Cerai, Silva, Thais Barros Gomes, Francisco, Agatha Densy dos Santos, Bandeira, Lucas, Cunha, Renato D., Coutinho‐Neto, Mauricio Domingues, Homem‐de‐Mello, Paula, Almeida, James, Orestes, Ednilsom, Nascimento, Regina Sandra Veiga
Format: Article
Language:English
Subjects:
Cetyltrimethylammonium bromide
Enhanced oil recovery
enhanced oil recovery (EOR)
Evaluation
hyperbranched polyglycerols
interfacial tension
Materials science
Molecular dynamics
Polyglycerols
Polymers
polymer‐surfactant interaction
Porous media
Surface tension
Surfactants
Zeta potential
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Summary:In this work, the efficiency of partially hydrophobized hyperbranched polyglycerols (HPG11 and HPG12) as cetyltrimethylammonium bromide (CTAB) carriers was evaluated to prevent surfactant losses by adsorption on reservoir rocks surface during enhanced oil recovery (EOR) processes. Interactions between surfactant and polymers were studied by conductivity, zeta potential, and particle size measurements showing that complexes were formed between the components. The ability of PG, HPG11, HPG12 and those complexes to reduce the interfacial tension (IFT) was verified and one of the complexes was able to reduce the IFT to values under 1.0 mN/m, suggesting the occurrence of a synergy between the components. Molecular dynamics simulations indicated the preferential sites of interaction between surfactants and HPGs. HPG11:CTAB and HPG12:CTAB complexes' ability to permeate an unconsolidated porous medium and deliver the surfactant at the water–oil interface, increasing oil production, was evaluated through transport and oil displacement tests, and the results showed that the HPG12:CTAB complex led to almost 90% of oil recovery. Partially hydrophobized hyperbranched polyglycerols act as cetyltrimethylammonium bromide (CTAB) nanocarriers. Complexes are formed due to the polymer‐surfactant interaction and they synergically reduce the oil‐water interfacial tension. The hyperbranched polymer deliver the surfactant at the water‐oil interface, increasing oil production to almost 90% of oil recovery.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.51725