Heterogeneous fluid flow in fractured layered carbonates and its implication for generation of incipient karst
| Autor: | Hervé Jourde, Qinghua Lei, Olivier Gosselin, Lidia Lonergan, John W. Cosgrove, Xiaoguang Wang |
|---|---|
| Přispěvatelé: | Total E&P Recherche Developpment, Department of Earth Science and Engineering [Imperial College London], Imperial College London, Hydrosciences Montpellier (HSM), Institut national des sciences de l'Univers (INSU - CNRS)-Institut de Recherche pour le Développement (IRD)-Université Montpellier 2 - Sciences et Techniques (UM2)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2017 |
| Předmět: |
Environmental Engineering
010504 meteorology & atmospheric sciences Bedding Flow (psychology) [SDU.STU]Sciences of the Universe [physics]/Earth Sciences 010502 geochemistry & geophysics 01 natural sciences 0905 Civil Engineering Physics::Geophysics Physics::Fluid Dynamics Carbonate rocks Bed Fluid dynamics Fracture flow Geotechnical engineering Hydraulic aperture Petrology Joint (geology) Karst aquifers 0105 earth and related environmental sciences Water Science and Technology Flow localization geography geography.geographical_feature_category Karst Multilayer joint networks 0907 Environmental Engineering Fracture (geology) Carbonate rock Fractal dimension Geology |
| Zdroj: | Advances in Water Resources Advances in Water Resources, Elsevier, 2017, 107, pp.502-516. ⟨10.1016/j.advwatres.2017.05.016⟩ |
| ISSN: | 0309-1708 |
| DOI: | 10.1016/j.advwatres.2017.05.016 |
| Popis: | International audience; 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect