Show simple item record

dc.contributor.author
Liu, Lijun
dc.contributor.author
Huang, Zhaoqin
dc.contributor.author
Yao, Jun
dc.contributor.author
Lei, Qinghua
dc.contributor.author
Di, Yuan
dc.contributor.author
Wu, Yu-Shu
dc.contributor.author
Zhang, Kai
dc.contributor.author
Cui, Shiti
dc.date.accessioned
2021-01-20T06:56:25Z
dc.date.available
2020-11-30T00:18:52Z
dc.date.available
2020-11-30T07:33:45Z
dc.date.available
2021-01-20T06:56:25Z
dc.date.issued
2021-01
dc.identifier.issn
1365-1609
dc.identifier.issn
0148-9062
dc.identifier.issn
1873-4545
dc.identifier.other
10.1016/j.ijrmms.2020.104543
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/453646
dc.description.abstract
Two-phase flow in fractured and karstified porous media subject to coupled hydro-mechanical conditions is an important issue for oil recovery in carbonate reservoirs. However, due to the co-existence of porous media flow, fracture flow and free flow, as well as their couplings with geomechanical deformation, modeling the behavior of fractured karst systems remains challenging. In this work, a novel coupled hydro-mechanical model for simulating the complex behavior of fractured and karstified porous media is developed. Two-phase Darcy's equation is used to describe fluid flow in both matrix and fractures, while the free flow in cavities is considered based on an assumption of phase instantaneous gravity segregation. A modified Barton-Bandis's constitutive model is used to mimic the nonlinear fracture deformation. The cavity deformation is solved based on the fluid pressure on the cavity boundaries. A mixed finite volume-finite element method and a fixed-stress iterative splitting method are adopted to numerically solve the coupled system of equations. The model is then applied to a series of 2D and 3D problems to unravel the impacts of fractures and cavities on two-phase flow and geomechanical deformation in fractured karst systems. The results indicate that cavities hinder water breakthrough due to storage effects, while water may quickly migrate through highly conductive fractures. Cavities tend to dominate the flow and mechanical processes even though fractures are present as well. Significant stress concentration is observed around cavities. Furthermore, the results of 3D cases imply that phase gravity segregation in cavities leads to lower water saturation in the area above cavities and delays water breakthrough.
en_US
dc.language.iso
en
en_US
dc.publisher
Pergamon
en_US
dc.subject
Coupled hydro-mechanical model
en_US
dc.subject
Two-phase flow
en_US
dc.subject
Fractured karst systems
en_US
dc.subject
Cavities
en_US
dc.subject
Fractures
en_US
dc.title
Simulating two-phase flow and geomechanical deformation in fractured karst reservoirs based on a coupled hydro-mechanical model
en_US
dc.type
Journal Article
dc.date.published
2020-11-26
ethz.journal.title
International Journal of Rock Mechanics and Mining Sciences
ethz.journal.volume
137
en_US
ethz.journal.abbreviated
Int. J. Rock Mech. Min. Sci.
ethz.pages.start
104543
en_US
ethz.size
21 p.
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Oxford
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02704 - Geologisches Institut / Geological Institute::03465 - Löw, Simon (emeritus) / Löw, Simon (emeritus)
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02704 - Geologisches Institut / Geological Institute::03465 - Löw, Simon (emeritus) / Löw, Simon (emeritus)
en_US
ethz.date.deposited
2020-11-30T00:19:03Z
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Metadata only
en_US
ethz.rosetta.installDate
2021-01-20T06:56:39Z
ethz.rosetta.lastUpdated
2022-03-29T04:53:14Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.atitle=Simulating%20two-phase%20flow%20and%20geomechanical%20deformation%20in%20fractured%20karst%20reservoirs%20based%20on%20a%20coupled%20hydro-mechanical%20model&rft.jtitle=International%20Journal%20of%20Rock%20Mechanics%20and%20Mining%20Sciences&rft.date=2021-01&rft.volume=137&rft.spage=104543&rft.issn=1365-1609&0148-9062&1873-4545&rft.au=Liu,%20Lijun&Huang,%20Zhaoqin&Yao,%20Jun&Lei,%20Qinghua&Di,%20Yuan&rft.genre=article&rft_id=info:doi/10.1016/j.ijrmms.2020.104543&
 Search print copy at ETH Library

Files in this item

FilesSizeFormatOpen in viewer

There are no files associated with this item.

Publication type

Show simple item record