Qualitative and Quantitative Changes of Carbonate Rocks Exposed to SC CO2 (Basque-Cantabrian Basin, Northern Spain)

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dc.contributor.author Berrezueta Alvarado, Edgar Raúl
dc.contributor.author Kovacs, Timea
dc.contributor.author Luquot, Linda
dc.date.accessioned 2020-09-16T10:14:20Z
dc.date.available 2020-09-16T10:14:20Z
dc.date.issued 2017-11-01
dc.identifier.citation Applied Sciences, vol.7, n.11, 1-17 es_ES
dc.identifier.issn 2076-3417
dc.identifier.uri http://hdl.handle.net/20.500.12468/316
dc.description.abstract This study aims at the qualitative and quantitative determination of porosity, mineralogical and textural changes in carbonate rock samples after injection of (i) supercritical CO2-rich brine and (ii) dry supercritical CO2, under similar experimental conditions (P = 75 bar, T = 35 ºC, 970 h exposure time and no CO2 flow). The studied rocks were sampled in the western Basque-Cantabrian Basin, North Spain, and consist of vuggy carbonates (“Carniolas”) of the Puerto de la Palombera formation (Hettangian). Mineralogical and pore space characterization is completed using optical microscopy, scanning electron microscopy and optical image analysis. In addition, X-ray fluorescence analyses are performed to refine the mineralogical information and to obtain whole rock geochemical data and the brine composition is analysed before and after the experiment. Mineralogical and chemical results indicate that the carbonate rocks exposed to supercritical CO2 in dry conditions do not suffer significant changes. However, the injection of supercritical CO2-rich brine induces chemical and physical changes in the rock due to the high reactivity of calcite at the low pH conditions produced by the acidified brine. Numerical modelling validates the experimental observations. These results can be used to characterize the behaviour of carbonate rocks under conditions similar to the vicinity of a CO2 injection well. The results should be considered only at the scale of the studied samples and not at reservoir scale. es_ES
dc.description.sponsorship Instituto Geológico y Minero de España, España es_ES
dc.description.sponsorship Hydrosciences Montpellier, Centre National de la Recherche Scientifique, France es_ES
dc.language.iso en es_ES
dc.publisher Multidisciplinary Digital Publishing Institute es_ES
dc.relation ALGECO2-IRMC es_ES
dc.relation CO2-Pore es_ES
dc.rights Acceso abierto es_ES
dc.subject carbonate rocks es_ES
dc.subject SC CO2 es_ES
dc.subject SC CO2-rich brine es_ES
dc.subject Quantitative petrography es_ES
dc.subject numericalmodelling es_ES
dc.title Qualitative and Quantitative Changes of Carbonate Rocks Exposed to SC CO2 (Basque-Cantabrian Basin, Northern Spain) es_ES
dc.type Postprint es_ES
dc.relation.publisherversion https://www.mdpi.com/2076-3417/7/11/1124 es_ES
dc.description.funder Instituto Geológico y Minero de España, España es_ES
dc.description.funder Plan Nacional de España, España es_ES
dc.identifier.doi https://doi.org/10.3390/app7111124 es_ES
dc.coverage.spatialStudy Cuenca vasco-cantábrica, Norte de España es_ES

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