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TitreA comparison of shale permeability coefficients derived using multiple non-steady-state measurement techniques: examples from the Duvernay Formation, Alberta (Canada)
AuteurGhanizadeh, A; Bhowmik, S; Haeri Ardakani, O; Sanei, H; Clarkson, C R
SourceFuel vol. 140, 2015 p. 371-387, https://doi.org/10.1016/j.fuel.2014.09.073
Année2015
Séries alt.Secteur des sciences de la Terre, Contribution externe 20140482
ÉditeurElsevier
Documentpublication en série
Lang.anglais
DOIhttps://doi.org/10.1016/j.fuel.2014.09.073
Mediapapier; en ligne; numérique
Formatspdf
ProvinceAlberta
SNRC83F; 83G; 83J; 83K
Lat/Long OENS-118.0000 -114.0000 55.0000 53.0000
Sujetsperméabilité; porosité; présence de pétrole; reservoirs; analyses des fluides du réservoir; migration des fluides; schistes; pétrole; gaz; hydrocarbures; pétrole; exploration pétrolière; ressources pétrolières; présence de pétrole; Formation de Duvernay ; géologie économique; combustibles fossiles; géochimie; géologie régional; Dévonien
Illustrationstables; schematic diagrams; graphs; equations
ProgrammeCaractérisation des réservoirs de schiste, Les géosciences pour les nouvelles sources d'énergie
Résumé(disponible en anglais seulement)
Matrix permeability, while an important control on fluid flow in unconventional reservoirs, is difficult to measure in the laboratory. There are now multiple methods for laboratory determination of permeability for shales, but little consensus on the appropriate method for permeability measurement. Each technique is based on different physical principles and utilizes reservoir samples at different scales. The combination of sample size and preparation and measurement conditions can lead to a wide range in permeability estimates, creating confusion for recipients of the data. In this work, we compare different non-steady state methods for determination of gas permeability in low-permeability Canadian shales and provide insight into the causes of permeability variation. Further, we analyze and discuss the effects of different controlling factors including porosity, pore-fluid content, mineralogy and effective stress on permeability. Gas permeability measurements were conducted on low-permeability (shale) samples from the Duvernay Formation (Alberta, Canada) using three different methods: profile (probe), pulse-decay and crushed-rock permeability techniques. The analyzed samples differ in total organic carbon (TOC) content, pore network characteristics (porosity, pore size distribution), pore-fluid content (''as-received'' and cleaned/dried) and mineralogy. Profile (probe) and crushed-rock permeability measurements were performed on samples in the ''as-received'' and cleaned/dried conditions. Pulse-decay measurements were conducted on samples in the cleaned/dried state. Helium pycnometry/expansion measurements were performed using ''as-received'' and cleaned/dried samples under unconfined and controlled ''in situ'' effective stress conditions.
Résumé(Résumé en langage clair et simple, non publié)
Nous avons présenté les résultats d'une étude menée en laboratoire sur les propriétés de stockage et de transport des fluides du schiste de Duvernay, une nouvelle zone pétrolière et gazière située en Alberta. L'étude compare différentes techniques pour l'évaluation de la perméabilité aux gaz dans les schistes à faible perméabilité. De plus, cette étude est la plus exhaustive réalisée à ce jour en matière de caractérisation en laboratoire de la porosité/perméabilité du schiste de Duvernay, en Alberta.
GEOSCAN ID295990