Evolution of permeability and Biot coefficient at high mean stresses in high porosity sandstone
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Clarkson Univ., Potsdam, NY (United States)
A series of constant mean stress (CMS) and constant shear stress (CSS) tests were performed to investigate the evolution of permeability and Biot coefficient at high mean stresses in a high porosity reservoir analog (Castlegate sandstone). Permeability decreases as expected with increasing mean stress, from about 20 Darcy at the beginning of the tests to between 1.5 and 0.3 Darcy at the end of the tests (mean stresses up to 275 MPa). The application of shear stress causes permeability to drop below that of a hydrostatic test at the same mean stress. Results show a nearly constant rate decrease in the Biot coefficient as the mean stress increases during hydrostatic loading, and as the shear stress increases during CMS loading. In conclusion, CSS tests show a stabilization of the Biot coefficient after the application of shear stress.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC04-94AL85000; SC0006883
- OSTI ID:
- 1375031
- Alternate ID(s):
- OSTI ID: 1415323
- Report Number(s):
- SAND2017-4146J; 652622
- Journal Information:
- International Journal of Rock Mechanics and Mining Sciences, Vol. 96, Issue C; ISSN 1365-1609
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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