Title :

Two-scale analysis of a tight gas sandstone

Author(s) :

Song, Yang [Auteur]
Centrale Lille
Laboratoire de Mécanique de Lille - FRE 3723 [LML]
Davy, Catherine [Auteur]
Centrale Lille
Laboratoire de Mécanique de Lille - FRE 3723 [LML]
Nguyen, Kim Thang [Auteur]
Milieux Environnementaux, Transferts et Interactions dans les hydrosystèmes et les Sols [METIS]
Troadec, David [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Hauss, Grégory [Auteur]
Laboratoire de Mécanique de Lille - FRE 3723 [LML]
Université de Lille, Sciences et Technologies
Jeannin, Laurent [Auteur]
ENGIE E&P International [La Défense]
Adler, Pierre M. [Auteur]
Milieux Environnementaux, Transferts et Interactions dans les hydrosystèmes et les Sols [METIS]

Journal title :

Physical Review E

Pages :

043316

Publisher :

American Physical Society (APS)

Publication date :

2016-10-24

ISSN :

2470-0045

HAL domain(s) :

Sciences de l'ingénieur [physics]

English abstract : [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 ...
Show more >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.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Collections :

• Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL