Role of geomechanically grown fractures on dispersive transport in heterogeneous geological formations

Handle URI:
http://hdl.handle.net/10754/599531
Title:
Role of geomechanically grown fractures on dispersive transport in heterogeneous geological formations
Authors:
Nick, H. M.; Paluszny, A.; Blunt, M. J.; Matthai, S. K.
Abstract:
A second order in space accurate implicit scheme for time-dependent advection-dispersion equations and a discrete fracture propagation model are employed to model solute transport in porous media. We study the impact of the fractures on mass transport and dispersion. To model flow and transport, pressure and transport equations are integrated using a finite-element, node-centered finite-volume approach. Fracture geometries are incrementally developed from a random distributions of material flaws using an adoptive geomechanical finite-element model that also produces fracture aperture distributions. This quasistatic propagation assumes a linear elastic rock matrix, and crack propagation is governed by a subcritical crack growth failure criterion. Fracture propagation, intersection, and closure are handled geometrically. The flow and transport simulations are separately conducted for a range of fracture densities that are generated by the geomechanical finite-element model. These computations show that the most influential parameters for solute transport in fractured porous media are as follows: fracture density and fracture-matrix flux ratio that is influenced by matrix permeability. Using an equivalent fracture aperture size, computed on the basis of equivalent permeability of the system, we also obtain an acceptable prediction of the macrodispersion of poorly interconnected fracture networks. The results hold for fractures at relatively low density. © 2011 American Physical Society.
Citation:
Nick HM, Paluszny A, Blunt MJ, Matthai SK (2011) Role of geomechanically grown fractures on dispersive transport in heterogeneous geological formations. Phys Rev E 84. Available: http://dx.doi.org/10.1103/PhysRevE.84.056301.
Publisher:
American Physical Society (APS)
Journal:
Physical Review E
KAUST Grant Number:
KUK-C1-017-12
Issue Date:
4-Nov-2011
DOI:
10.1103/PhysRevE.84.056301
PubMed ID:
22181492
Type:
Article
ISSN:
1539-3755; 1550-2376
Sponsors:
We thank the sponsors of the ITF project on Improved Simulation of Flow in Fractured and Faulted Reservoirs, and the Technology Strategy Board (TSB), for supporting this research. This work was partially supported by the Center-in-Development Award to Utrecht University (No KUK-C1-017-12) by King Abdullah University of Science and Technology. Dr. Matthew Piggott receives our thanks for scientific feedback and comments. We thank the Imperial College High Performance Computing Service for the use of their cluster.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorNick, H. M.en
dc.contributor.authorPaluszny, A.en
dc.contributor.authorBlunt, M. J.en
dc.contributor.authorMatthai, S. K.en
dc.date.accessioned2016-02-28T05:52:52Zen
dc.date.available2016-02-28T05:52:52Zen
dc.date.issued2011-11-04en
dc.identifier.citationNick HM, Paluszny A, Blunt MJ, Matthai SK (2011) Role of geomechanically grown fractures on dispersive transport in heterogeneous geological formations. Phys Rev E 84. Available: http://dx.doi.org/10.1103/PhysRevE.84.056301.en
dc.identifier.issn1539-3755en
dc.identifier.issn1550-2376en
dc.identifier.pmid22181492en
dc.identifier.doi10.1103/PhysRevE.84.056301en
dc.identifier.urihttp://hdl.handle.net/10754/599531en
dc.description.abstractA second order in space accurate implicit scheme for time-dependent advection-dispersion equations and a discrete fracture propagation model are employed to model solute transport in porous media. We study the impact of the fractures on mass transport and dispersion. To model flow and transport, pressure and transport equations are integrated using a finite-element, node-centered finite-volume approach. Fracture geometries are incrementally developed from a random distributions of material flaws using an adoptive geomechanical finite-element model that also produces fracture aperture distributions. This quasistatic propagation assumes a linear elastic rock matrix, and crack propagation is governed by a subcritical crack growth failure criterion. Fracture propagation, intersection, and closure are handled geometrically. The flow and transport simulations are separately conducted for a range of fracture densities that are generated by the geomechanical finite-element model. These computations show that the most influential parameters for solute transport in fractured porous media are as follows: fracture density and fracture-matrix flux ratio that is influenced by matrix permeability. Using an equivalent fracture aperture size, computed on the basis of equivalent permeability of the system, we also obtain an acceptable prediction of the macrodispersion of poorly interconnected fracture networks. The results hold for fractures at relatively low density. © 2011 American Physical Society.en
dc.description.sponsorshipWe thank the sponsors of the ITF project on Improved Simulation of Flow in Fractured and Faulted Reservoirs, and the Technology Strategy Board (TSB), for supporting this research. This work was partially supported by the Center-in-Development Award to Utrecht University (No KUK-C1-017-12) by King Abdullah University of Science and Technology. Dr. Matthew Piggott receives our thanks for scientific feedback and comments. We thank the Imperial College High Performance Computing Service for the use of their cluster.en
dc.publisherAmerican Physical Society (APS)en
dc.titleRole of geomechanically grown fractures on dispersive transport in heterogeneous geological formationsen
dc.typeArticleen
dc.identifier.journalPhysical Review Een
dc.contributor.institutionUtrecht University, Utrecht, Netherlandsen
dc.contributor.institutionImperial College London, London, United Kingdomen
dc.contributor.institutionMontan University, Leoben, Austriaen
kaust.grant.numberKUK-C1-017-12en

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