H51L-1551
Numerical Analysis of Non-Darcy CH4 Flow in Fracture Network of Coal Using Lattice Boltzmann Method

Friday, 18 December 2015
Poster Hall (Moscone South)
Qingang Zhang1, Yang Ju1, Jiangtao Zheng1, Wenbo Gong1 and Scientific Team of SKL Seepage Research, (1)China University of Mining Technology, Beijing, China
Abstract:
Coal seams comprise fractured coal that is naturally separated by discontinuous fractures or joints. These discontinuous fractures constitute a complicated fracture network that leads to the Non-Darcy CH4 flow. It is intractable for conventional models to describe the behavior and its mechanism of Non-Darcy CH4 flow in fractured coal. This paper reports a promising numerical analysis of the complex CH4 flow in the fracture network of coal using Lattice Boltzmann Method (LBM). The flow properties of CH4 flow, including viscosity distribution, average flow speed, permeability coefficient, are derived using the LBM model. The analysis is validated by comparing the LBM results with the experimental observation data.

Key words: Non-Darcy flow, CH4, fracture network, Lattice Boltzmann Method, Coal, Permeability