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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 Geological model of Cambro–Ordovician and Devonian reservoirs in Ahnet–Gourara. The location of this model is shown in Fig. 1a. The color indicates the surface depth of reservoirs. b Effective porosity distribution of Cambro–Ordovician and Devonian reservoirs in Ahnet–Gourara. c CO2 density distribution of Cambro–Ordovician and Devonian reservoirs in Ahnet–Gourara
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Fig2: a Geological model of Cambro–Ordovician and Devonian reservoirs in Ahnet–Gourara. The location of this model is shown in Fig. 1a. The color indicates the surface depth of reservoirs. b Effective porosity distribution of Cambro–Ordovician and Devonian reservoirs in Ahnet–Gourara. c CO2 density distribution of Cambro–Ordovician and Devonian reservoirs in Ahnet–Gourara

Mentions: Suitable geological formations for CO2 storage occur at a depth of 800–1000 m. These formations should be able to maintain the injected CO2 in a supercritical state, which has a liquid-like density (approximately 500–800 kg/m3; Fig. 2c), and thus facilitate efficient space filling of the underground storage volume. This density also allows the maintenance of low buoyancy and leads to a high CO2 storage capacity (De Connick et al. 2005).Fig. 2


CO2-storage assessment and effective capacity in Algeria.

Aktouf A, Bentellis A - Springerplus (2016)

a Geological model of Cambro–Ordovician and Devonian reservoirs in Ahnet–Gourara. The location of this model is shown in Fig. 1a. The color indicates the surface depth of reservoirs. b Effective porosity distribution of Cambro–Ordovician and Devonian reservoirs in Ahnet–Gourara. c CO2 density distribution of Cambro–Ordovician and Devonian reservoirs in Ahnet–Gourara
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

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

Fig2: a Geological model of Cambro–Ordovician and Devonian reservoirs in Ahnet–Gourara. The location of this model is shown in Fig. 1a. The color indicates the surface depth of reservoirs. b Effective porosity distribution of Cambro–Ordovician and Devonian reservoirs in Ahnet–Gourara. c CO2 density distribution of Cambro–Ordovician and Devonian reservoirs in Ahnet–Gourara
Mentions: Suitable geological formations for CO2 storage occur at a depth of 800–1000 m. These formations should be able to maintain the injected CO2 in a supercritical state, which has a liquid-like density (approximately 500–800 kg/m3; Fig. 2c), and thus facilitate efficient space filling of the underground storage volume. This density also allows the maintenance of low buoyancy and leads to a high CO2 storage capacity (De Connick et al. 2005).Fig. 2

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.