Effects of carbonated water injection on the pore system of a carbonate rock (coquina)

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorFederal University of Rio de Janeiro-
Autor(es): dc.contributorUtrecht University-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorSilveira, Thaís M.-
Autor(es): dc.creatorHoerlle, Fernanda-
Autor(es): dc.creatorRocha, Adriano S.-
Autor(es): dc.creatorLima, Maira C.O-
Autor(es): dc.creatorRamirez, Mateus G.-
Autor(es): dc.creatorPontedeiro, Elizabeth M.-
Autor(es): dc.creatorVan Genuchten, Martinus Th.-
Autor(es): dc.creatorCruz, Daniel O.A.-
Autor(es): dc.creatorCouto, Paulo-
Data de aceite: dc.date.accessioned2025-08-21T15:59:01Z-
Data de disponibilização: dc.date.available2025-08-21T15:59:01Z-
Data de envio: dc.date.issued2023-03-01-
Data de envio: dc.date.issued2023-03-01-
Data de envio: dc.date.issued2022-06-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.2478/johh-2022-0001-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/240167-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/240167-
Descrição: dc.descriptionCO2 injection is a well-known Enhanced Oil Recovery (EOR) technique that has been used for years to improve oil extraction from carbonate rock and other oil reservoirs. Optimal functioning of CO2 injection requires a thorough understanding of how this method affects the petrophysical properties of the rocks. We evaluated pore-scale changes in these properties, notably porosity and absolute permeability, following injection of CO2-saturated water in two coquina outcrop samples from the Morro do Chaves Formation in Brazil. The coquinas are close analogues of Pre-salt oil reservoirs off the coast of southern Brazil. The effects of carbonated water injection were evaluated using a series of experimental and numerical steps before and after coreflooding: cleaning, basic petrophysics, microtomography (microCT) imaging, nuclear magnetic resonance (NMR) analyses, and pore network modeling (PNM). Our study was motivated by an earlier experiment which did not show the development of a wormhole in the center of the sample, with a concomitant increase in permeability of the coquina as often noted in the literature. We instead observed a substantial decrease in the absolute permeability (between 71 and 77%), but with little effect on the porosity and no wormhole formation. While all tests were carried out on both samples, here we present a comprehensive analysis for one of the samples to illustrate changes at the pore network level. Different techniques were used for the pore-scale analyses, including pore network modeling using PoreStudio, and software developed by the authors to enable a statistical analysis of the pore network. Results provided much insight in how injected carbonated water affects the pore network of carbonate rocks.-
Descrição: dc.descriptionDepartment of Civil Engineering Coppe Federal University of Rio de Janeiro, RJ-
Descrição: dc.descriptionDepartment of Mechanical Engineering Coppe Federal University of Rio de Janeiro, RJ-
Descrição: dc.descriptionDepartment of Earth Sciences Utrecht University-
Descrição: dc.descriptionCenter for Environmental Studies Cea São Paulo State University, SP-
Descrição: dc.descriptionCenter for Environmental Studies Cea São Paulo State University, SP-
Formato: dc.format257-268-
Idioma: dc.languageen-
Relação: dc.relationJournal of Hydrology and Hydromechanics-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectCarbonate rocks-
Palavras-chave: dc.subjectCoreflooding-
Palavras-chave: dc.subjectPore Network Analysis-
Palavras-chave: dc.subjectPore Size Distribution-
Palavras-chave: dc.subjectPoreStudio-
Título: dc.titleEffects of carbonated water injection on the pore system of a carbonate rock (coquina)-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

Não existem arquivos associados a este item.