Comparison of long-term geochemical interactions at two natural CO2-analoguesMontmiral (Southeast Basin, France) and Messokampos (Florina Basin, Greece) case studies

Gaus, Irina; Guern, Cécile Le; Pearce, Jonathan; Pauwels, Hélène; Shepherd, T. J.; Hatziynnis, George; Metaxas, A.

doi:10.1016/b978-008044704-9/50057-4

Cited by 20 publications

(18 citation statements)

References 3 publications

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“…Gaus et al, 2005;Auqué et al, 2009;Choi et al, 2012). Those encompassing ı 13 C data of gas and water samples (Assayag et al, 2009) and/or CO 2 -He systematics (Jeandel et al, 2010) have been on low-temperature systems.…”

Section: Introductionmentioning

confidence: 99%

Turkish geothermal fields as natural analogues of CO 2 storage sites: Gas geochemistry and implications for CO 2 trapping mechanisms

Güleç

Hilton

2016

Geothermics

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Section: Introductionmentioning

confidence: 99%

Turkish geothermal fields as natural analogues of CO 2 storage sites: Gas geochemistry and implications for CO 2 trapping mechanisms

Güleç

Hilton

2016

Geothermics

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“…Analyses of the Montmiral waters suggests that dawsonite is close to saturation or slightly supersaturated (Pauwels et al, 2007). No dawsonite has however been observed (Gaus et al, 2004;Pauwels et al, 2007). The Messokampos reservoir has lower salinity than seawater, but abundant Na-feldspar and the high pH of 8.7 should in this case favour dawsonite growth.…”

Section: Introductionmentioning

confidence: 99%

“…For example, Gaus et al (2004) examined mineral reactions following long-term interactions with CO 2 for the Montmiral, Southeast Basin, France, at present-day 100ºC and 360 bar, and Messokampos, Florina Basin, Greece, at maximum 10 bar and 43ºC (Gaus et al, 2004). The Montmiral reservoir contains high-NaCl brines with salinities of about 3 times seawater, and K-feldspar that could act as an aluminium source for dawsonite growth.…”

Section: Introductionmentioning

confidence: 99%

Why is Dawsonite Absent in CO₂Charged Reservoirs?

Hellevang

Declercq

Aagaard

2011

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Résumé -Pourquoi la dawsonite est-elle absente des réservoirs chargés en CO 2 ? -La possibilité pour la dawsonite -un hydroxy-carbonate de sodium et d'aluminium (NaAl(OH) 2 CO 3 ) -de précipiter dans les aquifères salins dès lors que l'on y injecte du CO 2 a été suggérée dans maintes simulations menées sur différentes compositions (minéraux et solution aqueuse) et dans des conditions de pression et de température variées. Pourtant, sur le strict plan de la stabilité thermodynamique, la dawsonite paraît moins communément répandue que l'on pourrait s'y attendre dans les analogues naturels de stockages de CO 2 . On a cartographié la stabilité thermodynamique de la dawsonite par rapport à des phases minérales comme l'albite, la kaolinite et l'analcime, entre 37 et 200°C, puis on a simulé numériquement des évolutions minérales en système fermé à l'aide d'un nouveau formalisme cinétique pour la précipitation, formalisme qui inclut (1) un terme de nucléation, basé sur la théorie classique de la nucléation, et (2) un terme de croissance, dérivant de la théorie BCF de la croissance. Utilisant cette équation de vitesse, on a réalisé une étude de sensibilité pour examiner comment la croissance de la dawsonite varie avec la composition minérale, la température, la pression partielle de CO 2 , la vitesse de nucléation -et les variations de cette dernière avec la température et l'affinité chimique -, et enfin la constante de vitesse adoptée pour la loi de précipitation de la dawsonite. Lorsqu'on empêche la dawsonite de précipiter, le rapport de sur-saturation ne dépasse jamais 3 ou 4 pour des solutions de type eau de mer. La propension accrue à précipiter si la pression partielle de CO 2 augmente est contrebalancée par l'effet d'acidification de la solution. Diminuer jusqu'à 5 ordres de grandeur la vitesse de précipitation n'a qu'un effet limité sur le démarrage d'une croissance significative, et au bout de 1 000 ans de simulation la quantité de dawsonite formée est de 37 % ce qu'elle est dans le régime de précipitation maximale. Réduire le taux de nucléation a le même effet de retarder la croissance du minéral. Au bout du compte, sur la base de considérations thermodynamiques et au vu des simulations présentées, on suggère que le potentiel de croissance de la dawsonite est restreint à une fenêtre de températures médianes. À basse température, la stabilité relativement grande de la dawsonite vis-à-vis des minéraux en compétition est contrecarrée par la forte diminution des vitesses de nucléation et de croissance, ce qui reflète une puissante barrière énergétique. Abstract

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“…CO gas accumulation occurs in Miocene uvial sandstones (Figures 2 and 3) [9,23]. The vertically stacked reservoirs [7].…”

Section: Co Gas Source Accumulation and Leakagementioning

confidence: 99%

“…Since the Florina Basin is a site of many CO point sources, further study is warranted in order to assess its potential as a geological storage site. The Florina Basin thus represents not only an excellent site ( Figure 1) for commercial exploitation of the CO as an industrial gas, but it is also a good natural analogue for studying the impact of Carbon Capture and Storage (CCS) in general [9].…”

Section: Introductionmentioning

confidence: 99%

Geological modelling for investigating CO2 emissions in FlorinaBasin, Greece

et al. 2015

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This paper presents an investigation of naturally occurring CO emissions from the Florina natural analogue site in Greece. The main objective was to interpret previously collected depth sounding data, convert them into surfaces, and use them as input to develop, for the rst time, 3D geological models of the Florina basin. By also locating the extent of the aquifer, the location of the CO source, the location of other natural CO accumulations, and the points where CO reaches the surface, we were able to assess the potential for CO leakage. Geological models provided an estimate of the lithological composition of the Florina Basin and allowed us to determine possible directions of groundwater ow and pathways of CO ow throughout the basin. Important modelling parameters included the spatial positions of boundaries, faults, and major stratigraphic units (which were subdivided into layers of cells). We used various functions in Petrel software to rst construct a structural model describing the main rock boundaries. We then de ned a 3D mesh honouring the structural model, and nally we populated each cell in the mesh with geologic properties, such as rock type and relative permeability. According to the models, the thickest deposits are located around Mesochorion village where we estimate that around 1000 m of sediments were deposited above the basement. Initiation of CO ow at Florina Basin could have taken place between 6.5 Ma and 1.8 Ma ago. The NE-SW oriented faults, which acted as uid ow pathways, are still functioning today, allowing for localised leakage at the surface. CO leakage may be spatially variable and episodic in rate. The episodicity can be linked to the timing of Almopia volcanic activity in the area.

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Comparison of long-term geochemical interactions at two natural CO2-analoguesMontmiral (Southeast Basin, France) and Messokampos (Florina Basin, Greece) case studies

Cited by 20 publications

References 3 publications

Turkish geothermal fields as natural analogues of CO 2 storage sites: Gas geochemistry and implications for CO 2 trapping mechanisms

Turkish geothermal fields as natural analogues of CO 2 storage sites: Gas geochemistry and implications for CO 2 trapping mechanisms

Why is Dawsonite Absent in CO₂Charged Reservoirs?

Geological modelling for investigating CO2 emissions in FlorinaBasin, Greece

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Comparison of long-term geochemical interactions at two natural CO2-analoguesMontmiral (Southeast Basin, France) and Messokampos (Florina Basin, Greece) case studies

Cited by 20 publications

References 3 publications

Turkish geothermal fields as natural analogues of CO 2 storage sites: Gas geochemistry and implications for CO 2 trapping mechanisms

Turkish geothermal fields as natural analogues of CO 2 storage sites: Gas geochemistry and implications for CO 2 trapping mechanisms

Why is Dawsonite Absent in CO2Charged Reservoirs?

Geological modelling for investigating CO2 emissions in FlorinaBasin, Greece

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Product

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Why is Dawsonite Absent in CO₂Charged Reservoirs?