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CO2-storage assessment and effective capacity in Algeria.

Aktouf A, Bentellis A - Springerplus (2016)

Bottom Line: To reduce CO2 emissions, these basins were analyzed to identify those with the largest potential for the geological sequestration of CO2 (GSC).Estimations of the CO2 storage capacities of several structures in the sedimentary Ahnet-Gourara Basin, which has the greatest potential for GSC, vary from 1 Gt to over 5 Gt.Based on cautious estimations, these geologic structures should be able to contain the entire volume of the CO2 emitted over the next three decades at least.

View Article: PubMed Central - PubMed

Affiliation: Houari Boumediene University of Sciences and Technology, Bab Ezzouar, Algeria.

ABSTRACT
Deep saline aquifers widely distributed deep in the earth offer the greatest CO2 storage potential in all current geological CO2 storage approaches. The western region of the Saharan platform in Algeria includes several sedimentary basins characterized by a large production of dry gas with high CO2 rates sometimes exceeding 9 %. To reduce CO2 emissions, these basins were analyzed to identify those with the largest potential for the geological sequestration of CO2 (GSC). The evaluation methodology applied to determine the basin potential is based on qualitative geological and practical criteria to which we have assigned normalized numerical values. This evaluation method allows us to quantitatively compare and evaluate the basins in Algeria. Estimations of the CO2 storage capacities of several structures in the sedimentary Ahnet-Gourara Basin, which has the greatest potential for GSC, vary from 1 Gt to over 5 Gt. Based on cautious estimations, these geologic structures should be able to contain the entire volume of the CO2 emitted over the next three decades at least.

No MeSH data available.


a Geothermal and pressure gradient of Ahnet–Gourara basins. The locations of these profiles are shown as green dashed lines in (c) and Fig. 1a . b CO2 density as a function of depth at the different potential confinement sites. c The location of the 12 potential areas suitable for CO2 geological storage (dark blue areas)
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Fig3: a Geothermal and pressure gradient of Ahnet–Gourara basins. The locations of these profiles are shown as green dashed lines in (c) and Fig. 1a . b CO2 density as a function of depth at the different potential confinement sites. c The location of the 12 potential areas suitable for CO2 geological storage (dark blue areas)

Mentions: The CO2 density () at depth (kg/m3) varies depending on the temperature and pressure. The temperature (Fig. 3a) is defined by the equation:8\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\text{T}} = {\text{Ts}} + \left( {\Delta _{\text{Z}} *{\text{geothermal gradient}}} \right),$$\end{document}T=Ts+ΔZ∗geothermal gradient,where T is the temperature at depth (in meters), Ts is the surface temperature (in meters), ΔZ is the depth from the surface (in meters), and the geothermal gradient is calculated (°C/m).Fig. 3


CO2-storage assessment and effective capacity in Algeria.

Aktouf A, Bentellis A - Springerplus (2016)

a Geothermal and pressure gradient of Ahnet–Gourara basins. The locations of these profiles are shown as green dashed lines in (c) and Fig. 1a . b CO2 density as a function of depth at the different potential confinement sites. c The location of the 12 potential areas suitable for CO2 geological storage (dark blue areas)
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4940307&req=5

Fig3: a Geothermal and pressure gradient of Ahnet–Gourara basins. The locations of these profiles are shown as green dashed lines in (c) and Fig. 1a . b CO2 density as a function of depth at the different potential confinement sites. c The location of the 12 potential areas suitable for CO2 geological storage (dark blue areas)
Mentions: The CO2 density () at depth (kg/m3) varies depending on the temperature and pressure. The temperature (Fig. 3a) is defined by the equation:8\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\text{T}} = {\text{Ts}} + \left( {\Delta _{\text{Z}} *{\text{geothermal gradient}}} \right),$$\end{document}T=Ts+ΔZ∗geothermal gradient,where T is the temperature at depth (in meters), Ts is the surface temperature (in meters), ΔZ is the depth from the surface (in meters), and the geothermal gradient is calculated (°C/m).Fig. 3

Bottom Line: To reduce CO2 emissions, these basins were analyzed to identify those with the largest potential for the geological sequestration of CO2 (GSC).Estimations of the CO2 storage capacities of several structures in the sedimentary Ahnet-Gourara Basin, which has the greatest potential for GSC, vary from 1 Gt to over 5 Gt.Based on cautious estimations, these geologic structures should be able to contain the entire volume of the CO2 emitted over the next three decades at least.

View Article: PubMed Central - PubMed

Affiliation: Houari Boumediene University of Sciences and Technology, Bab Ezzouar, Algeria.

ABSTRACT
Deep saline aquifers widely distributed deep in the earth offer the greatest CO2 storage potential in all current geological CO2 storage approaches. The western region of the Saharan platform in Algeria includes several sedimentary basins characterized by a large production of dry gas with high CO2 rates sometimes exceeding 9 %. To reduce CO2 emissions, these basins were analyzed to identify those with the largest potential for the geological sequestration of CO2 (GSC). The evaluation methodology applied to determine the basin potential is based on qualitative geological and practical criteria to which we have assigned normalized numerical values. This evaluation method allows us to quantitatively compare and evaluate the basins in Algeria. Estimations of the CO2 storage capacities of several structures in the sedimentary Ahnet-Gourara Basin, which has the greatest potential for GSC, vary from 1 Gt to over 5 Gt. Based on cautious estimations, these geologic structures should be able to contain the entire volume of the CO2 emitted over the next three decades at least.

No MeSH data available.