Geochemical Modeling of Changes in Storage Rock Environments at CO2 Injection Sites

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27120%2F23%3A10252502" target="_blank" >RIV/61989100:27120/23:10252502 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27350/23:10252502

Výsledek na webu

<a href="https://www.mdpi.com/2075-163X/13/2/298" target="_blank" >https://www.mdpi.com/2075-163X/13/2/298</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/min13020298" target="_blank" >10.3390/min13020298</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Geochemical Modeling of Changes in Storage Rock Environments at CO2 Injection Sites

Popis výsledku v původním jazyce

Geochemical modeling in TOUGHREACT code was used to simulate chemical processes in CO2-rock-brackish water systems in a pilot research environment of CO2 storage in the Brodske area (Czech Republic). Models studied mineralogical changes in rock samples resulting from acidification of the aqueous phase caused by the dissolution of pressurized supercritical CO2. Rock samples of the reservoir horizon and cement from the grouting of an injection borehole were considered, and the water phase represented the mineralized groundwater. The aim of the study was to characterize the influence of CO2 in the geological structure on mineralogical rock changes and to predict gas distribution through the rocks bearing brackish water. The most important chemical processes are dissolution of carbonates and clay minerals during the injection of CO2 into the structure, as the increase in porosity in the structure affects the sequestration capacity of the reservoir rock. In the CO2-cement-brackish water system, the models confirm the rapid dissolution of portlandite and its replacement with calcite. The CSH gel is also dissolved, and silica gel appears. The porosity of the cement decreases. Further studies on such a cement slurry are needed to prevent the possibility of mechanical damage to the integrity of the borehole. (C) 2023 by the authors.

Název v anglickém jazyce

Geochemical Modeling of Changes in Storage Rock Environments at CO2 Injection Sites

Popis výsledku anglicky

Geochemical modeling in TOUGHREACT code was used to simulate chemical processes in CO2-rock-brackish water systems in a pilot research environment of CO2 storage in the Brodske area (Czech Republic). Models studied mineralogical changes in rock samples resulting from acidification of the aqueous phase caused by the dissolution of pressurized supercritical CO2. Rock samples of the reservoir horizon and cement from the grouting of an injection borehole were considered, and the water phase represented the mineralized groundwater. The aim of the study was to characterize the influence of CO2 in the geological structure on mineralogical rock changes and to predict gas distribution through the rocks bearing brackish water. The most important chemical processes are dissolution of carbonates and clay minerals during the injection of CO2 into the structure, as the increase in porosity in the structure affects the sequestration capacity of the reservoir rock. In the CO2-cement-brackish water system, the models confirm the rapid dissolution of portlandite and its replacement with calcite. The CSH gel is also dissolved, and silica gel appears. The porosity of the cement decreases. Further studies on such a cement slurry are needed to prevent the possibility of mechanical damage to the integrity of the borehole. (C) 2023 by the authors.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Minerals

ISSN

2075-163X

e-ISSN

—

Svazek periodika

13

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

14

Strana od-do

—

Kód UT WoS článku

000941834700001

EID výsledku v databázi Scopus

2-s2.0-85149196901