A Dual Fractal Poroelastic Model for Characterizing Fluid Flow in Fractured Coal Masses
Joint Authors
Ye, Dayu
Liu, Guannan
Liu, Jishan
Gao, Feng
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-06-22
Country of Publication
Egypt
No. of Pages
13
Main Subjects
Abstract EN
In the process of coalbed methane exploitation, the fracture and pore structure is the key problem that affects the permeability of coalbed.
At present, the coupling effect of fracture and pore structure and in situ stress is seldom considered in the study of coal seam permeability.
In this paper, the fractal seepage model is coupled with coal deformation, and the adsorption expansion effect is considered.
A multifield coupling model considering the influence of matrix and fracture structure is established.
Then, the influence of pore structure parameters of main fracture on macropermeability is analyzed, including (1) fractal dimension of fracture length, (2) maximum fracture length, (3) fractal dimension of throat diameter, and (4) fractal dimension of throat bending.
At the same time, the simulation results are compared with the results of Darcy’s uniform permeability model.
The results show that the permeability calculated by the proposed model is significantly different from that calculated by the traditional cubic model.
Under the action of in situ stress, when the porosity and other parameters remain unchanged, the macropermeability of coal is in direct proportion to the fractal dimension of coal fracture length, the fractal dimension of throat diameter, and the maximum fracture length and in inverse proportion to the fractal dimension of coal throat curvature.
American Psychological Association (APA)
Liu, Guannan& Ye, Dayu& Gao, Feng& Liu, Jishan. 2020. A Dual Fractal Poroelastic Model for Characterizing Fluid Flow in Fractured Coal Masses. Geofluids،Vol. 2020, no. 2020, pp.1-13.
https://search.emarefa.net/detail/BIM-1159458
Modern Language Association (MLA)
Liu, Guannan…[et al.]. A Dual Fractal Poroelastic Model for Characterizing Fluid Flow in Fractured Coal Masses. Geofluids No. 2020 (2020), pp.1-13.
https://search.emarefa.net/detail/BIM-1159458
American Medical Association (AMA)
Liu, Guannan& Ye, Dayu& Gao, Feng& Liu, Jishan. A Dual Fractal Poroelastic Model for Characterizing Fluid Flow in Fractured Coal Masses. Geofluids. 2020. Vol. 2020, no. 2020, pp.1-13.
https://search.emarefa.net/detail/BIM-1159458
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1159458