Two-scale analysis of a tight gas sandstone
Type de document :
Article dans une revue scientifique
URL permanente :
Titre :
Two-scale analysis of a tight gas sandstone
Auteur(s) :
Song, Yang [Auteur]
Davy, Catherine [Auteur]
Nguyen Kim, Thang [Auteur]
Troadec, David [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Hauss, Gregory [Auteur]
Jeannin, L. [Auteur]
Adler, P. M. [Auteur]
Davy, Catherine [Auteur]
Nguyen Kim, Thang [Auteur]
Troadec, David [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Hauss, Gregory [Auteur]
Jeannin, L. [Auteur]
Adler, P. M. [Auteur]
Titre de la revue :
Physical Review E
Numéro :
94
Date de publication :
2016-10-24
Discipline(s) HAL :
Chimie/Matériaux
Résumé en anglais : [en]
Tight gas sandstones are low porosity media, with a very small permeability (i.e., below 1 mD). Their porosity is below 10%, and it is mainly composed of fine noncemented microcracks, which are present between neighboring ...
Lire la suite >Tight gas sandstones are low porosity media, with a very small permeability (i.e., below 1 mD). Their porosity is below 10%, and it is mainly composed of fine noncemented microcracks, which are present between neighboring quartz grains. While empirical models of permeability are available, their predictions, which do not compare well with macroscopic measurements, are not reliable to assess gas well productivity. The purpose of this work is to compare the permeability measured on centimetric plugs to predictions based on pore structure data. Two macroscopic measurements are performed, namely dry gas permeability and mercury intrusion porosimetry (MIP), together with a series of local measurements including focused ion beam and scanning electron microscopy (FIB-SEM), x-ray computed microtomography (CMT), and standard two-dimensional (2D) SEM. Numerical modeling is performed by combining analyses on two scales, namely the microcrack network scale (given by 2D SEM) and the individual 3D microcrack scale (given by either FIB-SEM or CMT). The network permeability is calculated by means of techniques developed for fracture networks. This permeability is proportional to the microcrack transmissivity, which is determined by solving the Stokes equation in the microcracks measured by FIB-SEM or CMT. Good correlation with experimental permeability values is only found when using transmissivity from 3D CMT data.Lire moins >
Lire la suite >Tight gas sandstones are low porosity media, with a very small permeability (i.e., below 1 mD). Their porosity is below 10%, and it is mainly composed of fine noncemented microcracks, which are present between neighboring quartz grains. While empirical models of permeability are available, their predictions, which do not compare well with macroscopic measurements, are not reliable to assess gas well productivity. The purpose of this work is to compare the permeability measured on centimetric plugs to predictions based on pore structure data. Two macroscopic measurements are performed, namely dry gas permeability and mercury intrusion porosimetry (MIP), together with a series of local measurements including focused ion beam and scanning electron microscopy (FIB-SEM), x-ray computed microtomography (CMT), and standard two-dimensional (2D) SEM. Numerical modeling is performed by combining analyses on two scales, namely the microcrack network scale (given by 2D SEM) and the individual 3D microcrack scale (given by either FIB-SEM or CMT). The network permeability is calculated by means of techniques developed for fracture networks. This permeability is proportional to the microcrack transmissivity, which is determined by solving the Stokes equation in the microcracks measured by FIB-SEM or CMT. Good correlation with experimental permeability values is only found when using transmissivity from 3D CMT data.Lire moins >
Langue :
Anglais
Audience :
Internationale
Vulgarisation :
Non
Établissement(s) :
ISEN
Univ. Valenciennes
ENSCL
CNRS
Institut Catholique Lille
Centrale Lille
Univ. Artois
Université de Lille
Univ. Valenciennes
ENSCL
CNRS
Institut Catholique Lille
Centrale Lille
Univ. Artois
Université de Lille
Collections :
Équipe(s) de recherche :
Chimie, matériaux et procédés pour un nucléaire durable (CIMEND)
Date de dépôt :
2019-09-25T14:38:06Z