Open AccessStudy on pore network model of porous media hydrate permeability
Author(s) -
Qingge Zhang
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/657/1/012017
Subject(s) - porous medium , permeability (electromagnetism) , hydrate , porosity , relative permeability , materials science , saturation (graph theory) , network model , thermodynamics , mineralogy , chemistry , composite material , mathematics , membrane , physics , computer science , biochemistry , organic chemistry , combinatorics , database
Considering the influence of hydrate on fluid flow in porous media, the relationship between hydrate saturation and absolute permeability of porous media is studied by using pore network model. The absolute permeability of hydrate free porous media is calculated and the convergence is studied. The absolute permeability of hydrate bearing porous media is calculated, the phase equilibrium migration is studied, and the pore network model of hydrate porous media system is calculated. The results show that: (1)when the throat number in the pore network model is greater than 3000, the calculation result is relatively stable; (2)under the condition that the throat diameter follows the log-normal distribution, the permeability decreases faster with the increase of the standard deviation; (3)the calculation results of the network model are consistent with the experimental data, which proves its feasibility to a certain extent.