Estudo experimental da interação CO2 - rocha - fluido nas Formações Furnas e Ponta Grossa da Bacia do Paraná

摘要

The world's dependence on fossil fuels for power generation is causing an increase in the atmosphere CO2 concentration and leading to global warming. Alternatives are being developed to stabilize or even to reduce the CO2 levels in the atmosphere. Among them stands out the Carbon Geological Storage, which consists of storing permanently CO2 in suitable geological reservoirs and thus mitigate climate change. In this sense, the study of CO2 - rock - fluid interactions is essential for the understanding of the processes involved during the storage phase and safety of storage. This work aims to study caprocks and reservoir rocks from the Furnas and Ponta Grossa Formations of the Paraná Basin for carbon geological storage. The interaction between CO2-rock-fluid was studied simulating the geological conditions in laboratory experiments with high pressure (150 bar) reactors. Rock characterization pre-and postexperiments analyzes in Scanning Electron Microscope (SEM) and X-ray Diffractometer (XRD) were performed. Analysis of saline solution before and after the experiment was performed by Optical Emission Spectroscopy Inductively Coupled Plasma (ICP - OES) to identify ions present in solution. The results of this work demonstrated that the tested reservoirs and caprocks have limited interactions with CO2 resulting in limited mineral trapping mechanisms and high mineralogy integrity.