Porosity and Permeability Evolution with Deviatoric Stress of Reservoir Sandstone: Insights from Triaxial Compression Tests and In Situ Compression CT
Joint Authors
Hu, Cong
Agostini, Franck
Jia, Yonggang
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-16, 16 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-11-29
Country of Publication
Egypt
No. of Pages
16
Main Subjects
Abstract EN
Porosity and permeability are the two most important characteristics of underground gas storage in sandstone reservoirs.
Injection of gas into reservoir rocks will cause rock deformation.
The deformation will influence the porosity and permeability properties of the rocks.
We investigate the evolution of these two properties of storage sandstone by triaxial compression tests and a uniaxial in situ compression CT test.
As the deviatoric stress increases, the sandstone is compressed firstly (porosity reduction) and then dilates (porosity enhancement).
With the increase in confining stress, the occurrence of volumetric dilation will be delayed.
Trapped porosity of this sandstone at different deviatoric stresses is very small (0.122%-0.115%) which indicates that nearly all pores are connected.
During the compression stage, the decrease in permeability is related to compression of pores and microcracks.
During the volumetric dilation stage, it is related to increase in tortuosity.
This interpretation can be confirmed by observations of in situ compression CT.
The permeability evolution estimated by pore network modeling is consistent with macroscopic testing results.
American Psychological Association (APA)
Hu, Cong& Agostini, Franck& Jia, Yonggang. 2020. Porosity and Permeability Evolution with Deviatoric Stress of Reservoir Sandstone: Insights from Triaxial Compression Tests and In Situ Compression CT. Geofluids،Vol. 2020, no. 2020, pp.1-16.
https://search.emarefa.net/detail/BIM-1159749
Modern Language Association (MLA)
Hu, Cong…[et al.]. Porosity and Permeability Evolution with Deviatoric Stress of Reservoir Sandstone: Insights from Triaxial Compression Tests and In Situ Compression CT. Geofluids No. 2020 (2020), pp.1-16.
https://search.emarefa.net/detail/BIM-1159749
American Medical Association (AMA)
Hu, Cong& Agostini, Franck& Jia, Yonggang. Porosity and Permeability Evolution with Deviatoric Stress of Reservoir Sandstone: Insights from Triaxial Compression Tests and In Situ Compression CT. Geofluids. 2020. Vol. 2020, no. 2020, pp.1-16.
https://search.emarefa.net/detail/BIM-1159749
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1159749