Predicting water permeability in sedimentary rocks from capillary imbibition and pore structure

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Títol: Predicting water permeability in sedimentary rocks from capillary imbibition and pore structure
Autors: Benavente, David | Pla, Concepción | Cueto Mendoza, Nora | Galvañ Cortés, Sandra | Martínez Martínez, Javier | García del Cura, María Ángeles | Ordóñez Delgado, Salvador
Grups d'investigació o GITE: Petrología Aplicada | Economía del Turismo, Recursos Naturales y Nuevas Tecnologías (INNATUR) | Grupo de Investigación en Restauración Arquitectónica de la Universidad de Alicante. GIRAUA-CICOP
Centre, Departament o Servei: Universidad de Alicante. Departamento de Ciencias de la Tierra y del Medio Ambiente
Paraules clau: Absolute permeability | Permeability prediction | Spontaneous imbibition | Capillary absorption | Fluid transport properties | Wettability
Àrees de coneixement: Petrología y Geoquímica
Data de publicació: 10-de setembre-2015
Editor: Elsevier
Citació bibliogràfica: Engineering Geology. 2015, 195: 301-311. doi:10.1016/j.enggeo.2015.06.003
Resum: In this paper, absolute water permeability is estimated from capillary imbibition and pore structure for 15 sedimentary rock types. They present a wide range of petrographic characteristics that provide degrees of connectivity, porosities, pore size distributions, water absorption coefficients by capillarity and water permeabilities. A statistical analysis shows strong correlations among the petrophysical parameters of the studied rocks. Several fundamental properties are fitted into different linear and multiple expressions where water permeability is expressed as a generalized function of the properties. Some practical aspects of these correlations are highlighted in order to use capillary imbibition tests to estimate permeability. The permeability–porosity relation is discussed in the context of the influence of pore connectivity and wettability. As a consequence, we propose a generalized model for permeability that includes information about water fluid rate (water absorption coefficient by capillarity), water properties (density and viscosity), wetting (interfacial tension and contact angle) and pore structure (pore radius and porosity). Its application is examined in terms of the type of pores that contribute to water transport and wettability. The results indicate that the threshold pore radius, in which water percolates through rock, achieves the best description of the pore system. The proposed equation is compared against Carman–Kozeny's and Katz–Thompson's equations. The proposed equation achieves very accurate predictions of the water permeability in the range of 0.01 to 1000 mD.
Patrocinadors: This study was financed by the Spanish Ministry of Science and Innovation CGL2011-25162. A pre-doctoral research fellowship was awarded to C. Pla for this project.
ISSN: 0013-7952 (Print) | 1872-6917 (Online)
DOI: 10.1016/j.enggeo.2015.06.003
Idioma: eng
Tipus: info:eu-repo/semantics/article
Drets: © 2015 Elsevier B.V.
Revisió científica: si
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