Heterogeneous fluid flow in fractured layered carbonates and its implication for generation of incipient karst
File(s)
Accepted version
Author(s)
Type
Journal Article
Abstract
We use numerical models to investigate fluid flow in layered fractured carbonate rocks, and specifically to investigate the effects of the structural and hydraulic properties of both joints and bedding planes on flow localization. Synthetic fracture networks made up of two jointed layers separated by a horizontal bedding plane are generated to represent the typical layered fracture systems often formed in carbonate rocks. A uniform aperture field is assumed for each joint set and for the bedding plane, but different joint sets and the bedding plane can have non-identical values. The aperture ratio of the joint sets to the bedding plane is found to dominate the behaviour of flow heterogeneity on the bedding plane. Three distinct flow regimes, i.e. joint-dominated, transitional and bedding plane-dominated, are recognized. The magnitude of the aperture ratio controls which flow regime develops. We further suggest that the different flow regimes may be responsible for the initiation of different types of incipient karst morphologies observed in nature: pipe karst, stripe karst and sheet karst.
Date Issued
2017-05-20
Date Acceptance
2017-05-20
Citation
Advances in Water Resources, 2017, 107, pp.502-516
ISSN
1872-9657
Publisher
Elsevier
Start Page
502
End Page
516
Journal / Book Title
Advances in Water Resources
Volume
107
Copyright Statement
© 2017 Published by Elsevier Ltd. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Sponsor
Total E&P Recherche Developpment
Total E&P Recherche Developpment
Grant Number
FR00006274
FR00006274
Subjects
0905 Civil Engineering
0907 Environmental Engineering
Environmental Engineering
Publication Status
Published