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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.


Schematic representation of a “composite log” of one of the boreholes in “Tidikelt North”
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Fig7: Schematic representation of a “composite log” of one of the boreholes in “Tidikelt North”

Mentions: From seismo-stratigraphic and seismic perspectives, these deposits are represented by a considerable amplitude and subparallel and continuous reflections and overcome a Cambro–Ordovician unconformity or infra-tasilienne unconformity. Additionally, a thick, 1200-m sedimentary series of shales of Ordovician and, specifically, El Gassi Clay play the role of caprock in addition to the Silurian shales, which represent the regional coverage for the Cambro–Ordovician reservoirs. To the west of the reservoir series based on infra-Cambrian formations of clay and green finely laminated silts clays often containing dropped pebbles (dropstones), the depositional environment corresponds to a sea or lake environment (Fig. 7).Fig. 7


CO2-storage assessment and effective capacity in Algeria.

Aktouf A, Bentellis A - Springerplus (2016)

Schematic representation of a “composite log” of one of the boreholes in “Tidikelt North”
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

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

Fig7: Schematic representation of a “composite log” of one of the boreholes in “Tidikelt North”
Mentions: From seismo-stratigraphic and seismic perspectives, these deposits are represented by a considerable amplitude and subparallel and continuous reflections and overcome a Cambro–Ordovician unconformity or infra-tasilienne unconformity. Additionally, a thick, 1200-m sedimentary series of shales of Ordovician and, specifically, El Gassi Clay play the role of caprock in addition to the Silurian shales, which represent the regional coverage for the Cambro–Ordovician reservoirs. To the west of the reservoir series based on infra-Cambrian formations of clay and green finely laminated silts clays often containing dropped pebbles (dropstones), the depositional environment corresponds to a sea or lake environment (Fig. 7).Fig. 7

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.