Izvorni znanstveni članak
https://doi.org/10.17794/rgn.2021.5.14
THE EVALUATION OF THE EFFECT OF FRACTURE GEOMETRY ON PERMEABILITY BASED ON LABORATORY STUDY AND NUMERICAL MODELLING
Mohammad Faez
orcid.org/0000-0001-8125-8772
; Department of Mining Eng., Petroleum and Geophysics, Shahrood University of Technology
Ahmad Ramezanzadeh
; Department of Mining Eng., Petroleum and Geophysics, Shahrood University of Technology
Reza Ghavami-Riabi
; Department of Mining Eng., Petroleum and Geophysics, Shahrood University of Technology
Behzad Tokhmechi
; Department of Mining Eng., Petroleum and Geophysics, Shahrood University of Technology
Sažetak
The geometry of fractures includes orientation, spacing, aperture are among the parameters affecting permeability in rocks. Studying the effect of fractures geometry on the permeability in a laboratory scale requires the selection of a suitable sample in terms of physical and mechanical properties. Therefore, in this study, fibrous fiber was selected due to low water absorption and permeability as well as its non-brittle behavior and flexibility. In order to investigate the effect of fracture geometry on the permeability, 1, 2, 3, and 4 fractures with spacing greater than 50 mm, 50 mm, 25 mm, and 15 mm and with orientations of 0, 15, 30, 45, and 60 degrees to the horizon in the sample were created. The fractures did not come into contact with the surface of the sample .The results showed that the permeability raises exponentially with increasing orientation and decreasing the spacing. This situation is mostly seen in fractures with orientations larger than 30 degrees. Also, the permeability measured in the laboratory was compared with the results obtained from the numerical method of distinct elements and UDEC software. The results showed an error of about 10-15%, which is well-matched between the permeability obtained from the laboratory and the numerical method.
Ključne riječi
permeability; fracture geometry; fibrous fiber; distinct element; UDEC Software
Hrčak ID:
266324
URI
Datum izdavanja:
24.11.2021.
Posjeta: 695 *