Estudo do comportamento da rocha reservatório em presença de co2 e solução salina para fins de armazenamento geológico

Detalhes bibliográficos
Ano de defesa: 2014
Autor(a) principal: Pires Neto, Diker Lima lattes
Orientador(a): Iglesias, Rodrigo Sebastian lattes
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Pontifícia Universidade Católica do Rio Grande do Sul
Programa de Pós-Graduação: Programa de Pós-Graduação em Engenharia e Tecnologia de Materiais
Departamento: Faculdade de Engenharia
País: BR
Palavras-chave em Português:
Área do conhecimento CNPq:
Link de acesso: http://tede2.pucrs.br/tede2/handle/tede/3261
Resumo: High consumption of fossil fuels, relentless pursuit for economic development has generated excessive increase of anthropogenic emissions of greenhouse gases (GHGs), particularly of carbon dioxide (CO2). Carbon capture and geological storage is an alternative to mitigate CO2 emissions at industrial scale. This work aims to study the influence of salinity aqueous phase using CO2 in supercritical state on change of physical, chemical, and mineralogical parameters of sandstone reservoir rock, representative of the Furnas Formation in Paraná (PR) State, Brazil, in conditions of geological storage. Experiments were performed about 15 days in stainless steel batch reactors AISI 304 subjected to pressure and constant temperature (120 bar and 75 oC), similar to those found in geological formations. In parallel, PHREEQCv3.0 code was used to simulate the geological interactions Rock-CO2-Saline solution equilibrium. Characterization of solid was performed with Microscopy in Binocular Loupe, X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS) and, the aqueous phase was by ICP-OES, for analysis of cations and Ion Chomatography (IC) for analysis of anions. Those techniques converged to the same results where quartz, kaolinite and illite were found as primary mineral in abundance of mineralogical composition of the Furnas rock. Globally, the Furnas sample is not so reactive in the presence of CO2, milli-Q water and saline solution in geological storage conditions. However, partial dissolution of illite and reprecipitation of kaolinite and silica were identified at the lab scale. These results were confirmed by numerical simulations.