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dc.contributor.author
Wang, Wenxia
dc.contributor.author
Madland, Merete V.
dc.contributor.author
Zimmermann, Udo
dc.contributor.author
Nermoen, Anders
dc.contributor.author
Korsnes, Reidar I.
dc.contributor.author
Bertolino, Silvana Raquel Alina
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dc.contributor.author
Hildebrand Habel, Tania
dc.date.available
2023-01-30T19:52:10Z
dc.date.issued
2016-10
dc.identifier.citation
Wang, Wenxia; Madland, Merete V.; Zimmermann, Udo; Nermoen, Anders; Korsnes, Reidar I.; et al.; Evaluation of porosity change during chemo-mechanical compaction in flooding experiments on Liège outcrop chalk; Geological Society of London; Geological Society of London Special Publication; 435; 1; 10-2016; 217-234
dc.identifier.issn
0305-8719
dc.identifier.uri
http://hdl.handle.net/11336/186199
dc.description.abstract
The mechanical strength, porosity and permeability of chalk are affected by chemical and mineralogical changes induced by fluids that are chemically out of equilibrium with the host rock. Here, two high-porosity Upper Cretaceous chalk cores from Liège were tested at effective stresses beyond yield at 130°C during flooding with MgCl2 and NaCl brines. Core L1 (flooded by MgCl2 brine) deformed more than L2 (flooded with NaCl brine), with volumetric strains of 9.4% and 5.1%, respectively. The porosity losses estimated from strain measurements alone are 5.82% for L1 and 3.01% for L2. However, this approach does not account for dissolution and precipitation reactions. Porosity calculations that are based on strain measurements in combination with (i) the weight difference between saturated and dry cores and (ii) the solid density measurement before and after flooding show an average porosity reduction of 3.69% between the two methods for L1. This discrepancy was not observed for core L2 (with the NaCl brine). The rock and effluent chemistry show that Ca2+ dissolved and Mg2+ is retained within the core for the L1 experiment. Therefore, accurate porosity calculations in chalk cores that are flooded by non-equilibrium brines (e.g. MgCl2) require both the volumetric strain and chemical alteration to be considered.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Geological Society of London
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
OIL RECOVERY
dc.subject
CHALK
dc.subject
LIEGE
dc.subject
POROSITY
dc.subject.classification
Geociencias multidisciplinaria
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Evaluation of porosity change during chemo-mechanical compaction in flooding experiments on Liège outcrop chalk
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-01-27T16:05:44Z
dc.journal.volume
435
dc.journal.number
1
dc.journal.pagination
217-234
dc.journal.pais
Reino Unido
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dc.journal.ciudad
Londres
dc.description.fil
Fil: Wang, Wenxia. University Of Stavanger; Noruega
dc.description.fil
Fil: Madland, Merete V.. University Of Stavanger; Noruega
dc.description.fil
Fil: Zimmermann, Udo. University Of Stavanger; Noruega
dc.description.fil
Fil: Nermoen, Anders. University Of Stavanger; Noruega. International Research Institute of Stavanger; Noruega
dc.description.fil
Fil: Korsnes, Reidar I.. University Of Stavanger; Noruega
dc.description.fil
Fil: Bertolino, Silvana Raquel Alina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina
dc.description.fil
Fil: Hildebrand Habel, Tania. University Of Stavanger; Noruega. International Research Institute of Stavanger; Noruega
dc.journal.title
Geological Society of London Special Publication
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.lyellcollection.org/doi/10.1144/SP435.10
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1144/SP435.10
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