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

• Autor(a) principal: Pires Neto, Diker Lima
• Data de Publicação: 2014
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da PUC_RS
• Texto Completo: http://tede2.pucrs.br/tede2/handle/tede/3261
• topic: ENGENHARIA DE MATERIAIS; DIÓXIDO DE CARBONO E MEIO AMBIENTE; CARBONO - ARMAZENAMENTO; RESERVATÓRIOS; CNPQ::ENGENHARIAS

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.