CO<sub>2</sub> SOLUBILITY IN WATER AND BRINE UNDER RESERVOIR CONDITIONS

Enick, Robert M.; Klara, Scott M.

doi:10.1080/00986449008940574

Cited by 225 publications

(107 citation statements)

References 38 publications

Supporting

Mentioning

100

Contrasting

Unclassified

Order By: Relevance

“…Subscripts m and w denote the CO 2 + water mixture and the initial water, respectively. Both viscosity [1,29] and density [9,25] are functions of the CO 2 concentration and increase with increasing carbon dioxide concentration. The pressure in both phases is the same as we ignore the capillary forces and therefore p m = p w = p. The saturated density difference between an aqueous solution of CO 2 and pure water is given by c ρ p g , where the value of the c ρ = 0.261 kg/m 3 /bar for pure water (see [21], p. 72); c ρ will be less for formation brines, because the solubility of CO 2 in water decreases with increasing salinity.…”

Section: Governing Equationsmentioning

confidence: 99%

An empirical theory for gravitationally unstable flow in porous media

et al. 2013

View full text Add to dashboard Cite

In this paper, we follow a similar procedure as proposed by Koval (SPE J 3(2): [145][146][147][148][149][150][151][152][153][154] 1963) to analytically model CO 2 transfer between the overriding carbon dioxide layer and the brine layer below it. We show that a very thin diffusive layer on top separates the interface from a gravitationally unstable convective flow layer below it. Flow in the gravitationally unstable layer is described by the theory of Koval, a theory that is widely used and which describes miscible displacement as a pseudo two-phase flow problem. The pseudo two-phase flow problem provides the average concentration of CO 2 in the brine as a function of distance. We find that downstream of the diffusive layer, the solution of the convective part of the model, is a rarefaction solution that starts at the saturation corresponding to the highest value of the fractional-flow function. The model uses two free parameters, viz., a dilution factor and a gravity fingering index. A comparison of the Koval model with the horizontally averaged concentrations obtained from 2-D numerical simulations provides a correlation for the two parameters with the Rayleigh number. The obtained scaling relations can be used in numerical simulators to account for the density-driven natural convection, which cannot be currently captured because the grid cells are typically orders of magnitude

show abstract

Section: Governing Equationsmentioning

confidence: 99%

An empirical theory for gravitationally unstable flow in porous media

et al. 2013

View full text Add to dashboard Cite

show abstract

“…Geochemist's Workbench, PHREEQC, and CO 2 solubility models of Enick and Klara (1990) and Duan and Sun (2003) Title of Carbonation of oilwell cement; SACROC Unit reservoir (continuous CO 2 -flooding operation) (see in Table 5. 2) …”

Section: Literature Reviewmentioning

confidence: 99%

Thermodynamic Data for Geochemical Modeling of Carbonate Reactions Associated with CO2 Sequestration – Literature Review

Krupka

Cantrell

McGrail

2010

View full text Add to dashboard Cite

SummaryPermanent storage of anthropogenic CO 2 in deep geologic formations is being considered as a means to reduce the concentration of atmospheric CO 2 and thus its contribution to global climate change. To assure safe and effective geologic sequestration, numerous studies have been completed regarding the extent to which CO 2 migrates within geologic formations, and what physical and geochemical changes occur in these formations when CO 2 is injected. Sophisticated, computerized reservoir simulations are used as part of field site and laboratory CO 2 sequestration studies. These simulations use coupled multiphase flow-reactive chemical transport models and/or standalone (i.e., no coupled fluid transport) geochemical models to calculate gas solubility, aqueous complexation, reduction/oxidation (redox), and/or mineral solubility reactions related to CO 2 injection and sequestration.Thermodynamic data are critical inputs to modeling geochemical processes. The adequacy of thermodynamic data for carbonate compounds has been identified as an important data requirement for the successful application of these geochemical reaction models to CO 2 sequestration. Therefore, a review was completed of thermodynamic data for CO 2 gas and carbonate aqueous species and minerals present in published data compilations and databases used in geochemical reaction models. Published studies that describe mineralogical analyses from CO 2 sequestration field and natural analogue sites and laboratory studies were also reviewed to identify specific carbonate minerals that are important to CO 2 sequestration reactions and therefore require thermodynamic data.The results of the literature review (Section 5.0) indicate that an extensive thermodynamic database exists for CO 2 and CH 4 gases, carbonate aqueous species, and carbonate minerals. Values of ∆ f G 298° and/or log K r,298° are available for essentially all of these compounds. However, log K r,T° or heat capacity values at temperatures above 298 K exist for less than approximately one-third of these compounds. Because the temperatures of host formations that will be used for CO 2 injection and sequestration will be at temperatures in the range of 50ºC to 100ºC or greater, the lack of high-temperature thermodynamic values for key carbonate compounds, especially minerals, will impact the accuracy of some modeling calculations.In comparison to the available thermodynamic data for carbonate minerals, only a small number of carbonate minerals have been described in published studies as actually being present in the host rock formations at CO 2 injection test sites or natural analogue sites, reaction products of CO 2 injection/ intrusion into a host formation, or as mineral reactants or products of laboratory CO 2 fluid-rock and -mineral experiments. Except for a few carbonate solid-solution minerals (ferroan and magnesian carbonates and ferroan dolomite), thermodynamic data are available for the pure carbonate minerals identified in these natural analogue site and fluid-rock and -mineral...

show abstract

“…Carbon dioxide (CO 2 ) is highly soluble in hydrocarbon (e.g., Simon and Graue, 1965;Vengu, 1983;Chung et al, 1988) and also, though relatively less, in water (e.g., Enick and Klara, 1990;Duan and Sun, 2003;Kervévan et al, this issue, Portier and Rochelle, in press). When CO 2 dissolves in water, it forms the quantitatively dominant solvated molecule CO 2 (aq) and the carbonic acid H 2 CO 3 molecule (e.g., Stumm and Morgan, 1970;Usdowski, 1982).…”

Section: Introductionmentioning

confidence: 99%

Modelling Fluid-Rock Interaction Induced by the Percolation of CO₂-Enriched Solutions in Core Samples: the Role of Reactive Surface Area

Brosse

Magnier

Vincent

2005

Oil & Gas Science and Technology - Rev. IFP

View full text Add to dashboard Cite

Résumé -La modélisation des interactions eau-roche induites par la percolation de solutions enrichies en CO 2 dans des échantillons de carottes : le rôle de la surface réactive -Comprendre le devenir du dioxyde de carbone (CO 2 ) injecté dans des aquifères ou des gisements d'hydrocarbures exploités reposera en partie sur l'utilisation de modèles chimie-transport, capables de prédire les interactions possibles entre les eaux acidifiées et les minéraux. Les résultats fournis par de tels modèles dépendent d'un grand nombre d'hypothèses et de paramètres, parfois mal contraints. Un aspect clé est l'intégration, dans les simulations portant sur des roches, de vitesses de réaction mesurées sur des minéraux apprêtés et isolés, et avec des rapports eau-roche beaucoup plus élevés. Cet article est consacré à la modélisation d'expériences de percolation réactive, qui ont été mises au point pour améliorer l'intégration des vitesses de réaction. Ces expériences ont été menées sur des échantillons de calcaire naturel purement constitués de calcite (Noiriel et al., ce volume), dans des conditions de température, de pression, de pression partielle de CO 2 (pCO 2 ) et de composition d'eau pour lesquelles une vitesse de dissolution de la calcite est disponible (Plummer et al., 1978, modèle dit PWP). Ainsi, un modèle chimie-transport peut être utilisé pour simuler les expériences et pour discuter, précisément, la manière de transposer à la roche le modèle cinétique du minéral. La comparaison entre les résultats expérimentaux et les résultats de calcul ne permet pas de décider du contrôle de la réaction de dissolution du calcaire, dans les conditions étudiées : soit la réaction de surface, soit un mécanisme de transport d'espèce(s) dans la phase aqueuse. Dans le premier cas, la démarche consiste à ajuster la valeur d'une surface dite « réactive ». Dans le second cas, le paramètre d'ajustement est l'épaisseur moyenne d'une couche diffuse, qui dépend du pH. Abstract

show abstract

CO₂ SOLUBILITY IN WATER AND BRINE UNDER RESERVOIR CONDITIONS

Cited by 225 publications

References 38 publications

An empirical theory for gravitationally unstable flow in porous media

An empirical theory for gravitationally unstable flow in porous media

Thermodynamic Data for Geochemical Modeling of Carbonate Reactions Associated with CO2 Sequestration – Literature Review

Modelling Fluid-Rock Interaction Induced by the Percolation of CO₂-Enriched Solutions in Core Samples: the Role of Reactive Surface Area

Contact Info

Product

Resources

About

CO2 SOLUBILITY IN WATER AND BRINE UNDER RESERVOIR CONDITIONS

Cited by 225 publications

References 38 publications

An empirical theory for gravitationally unstable flow in porous media

An empirical theory for gravitationally unstable flow in porous media

Thermodynamic Data for Geochemical Modeling of Carbonate Reactions Associated with CO2 Sequestration – Literature Review

Modelling Fluid-Rock Interaction Induced by the Percolation of CO2-Enriched Solutions in Core Samples: the Role of Reactive Surface Area

Contact Info

Product

Resources

About

CO₂ SOLUBILITY IN WATER AND BRINE UNDER RESERVOIR CONDITIONS

Modelling Fluid-Rock Interaction Induced by the Percolation of CO₂-Enriched Solutions in Core Samples: the Role of Reactive Surface Area