Modeling of Compositional Gas Transport in Shale as a Deformable Porous Medium

O. M. Olorode, I. Y. Akkutlu, Yalchin Efendiev

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Commercial production from resource shale has been realized largely due to the creation of propped hydraulic fractures in these unconventional resources. However, the pore pressure declines during production, resulting in a decrease in the fracture width and conductivity. This is because of the matrix and proppant deformation, and consequent embedment of proppants in the shale matrix. We present a new mathematical model and simulation framework to model multicomponent advection and molecular diffusion in a deformable shale medium using the control volume finite element method.We use the Maxwell-Stefan diffusion theory to model the composition- and pressure-dependence of molecular diffusion, while we use a continuum with viscoelastic properties to model the stress and time-dependence of the propped fracture conductivity. The study shows that shale-gas well production creates a non-uniform stress field near the fracture surface. This production-induced stress field tends to close the hydraulic fracture and decrease its aperture over time.

Original languageEnglish (US)
Title of host publicationPoromechanics 2017 - Proceedings of the 6th Biot Conference on Poromechanics
EditorsPatrick Dangla, Jean-Michel Pereira, Siavash Ghabezloo, Matthieu Vandamme
PublisherAmerican Society of Civil Engineers (ASCE)
Pages1984-1991
Number of pages8
ISBN (Electronic)9780784480779
DOIs
StatePublished - Jan 1 2017
Event6th Biot Conference on Poromechanics, Poromechanics 2017 - Paris, France
Duration: Jul 9 2017Jul 13 2017

Publication series

NamePoromechanics 2017 - Proceedings of the 6th Biot Conference on Poromechanics

Other

Other6th Biot Conference on Poromechanics, Poromechanics 2017
CountryFrance
CityParis
Period07/9/1707/13/17

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Acoustics and Ultrasonics

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