Multicomponent and multiphase CO2-brine system in microfluidic characterised in situ by Raman spectroscopy

This is a Preprint and has not been peer reviewed. The published version of this Preprint is available: https://doi.org/10.3997/2214-4609.2023101024. This is version 1 of this Preprint.

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Authors

Michał Zając, Stanisław Nagy, Szymon Kuczyński, Karol Dąbrowski, Rafał Smulski, Helge Hellevang, Mohammad Nooraiepour , Mohammad Masoudi

Abstract

Deep-saline aquifers could be instrumental in the geological storage of carbon dioxide due to their relatively good reservoir properties, high volume, and prevalence. However, there are a few difficulties which should be overcome to obtain effective stores in such reservoirs. Most problems are related to formation damage caused by salt precipitation. Due to the complexity of such systems, it is necessary to identify crucial processes, phenomena, factors, and products. In our work, we present a novel platform to trace precipitation ‘in situ’ using microfluidics and Raman spectroscopy. We have built a set in which we can investigate not only the salt deposition phenomenon in pores or microchannels by visual observation but also, because of Raman spectroscopy, determine the kinetics of reactions, carbon dioxide solubility, phase composition, and crystal composition. On the basis of our research, we have identified intensive clogging of pores and fast growth of crystals on the rock-like grain boundaries and bottlenecks. Furthermore, in a 20% weight NaCl solution we have found precipitated carbonates, for example, nitrate. Our results can broaden our understanding of CCS in high-saline aquifers and contribute to the development and common use of this process.

DOI

https://doi.org/10.31223/X5H99K

Subjects

Chemical Engineering, Complex Fluids, Mining Engineering, Petroleum Engineering

Keywords

nucleation, precipitation, crystal growth, Raman spectroscopy, Microfluidic, Raman spectroscoy, CO2, Precipitation, Crystal Growth, CCS

Dates

Published: 2024-06-06 22:52

Last Updated: 2024-06-07 05:52

License

CC BY Attribution 4.0 International