Unconventional natural gas has become an important source of energy. However, the
development of such resources has been challenging as these reservoirs are characterised …

For decades, scientists and engineers have been investigating and describing storage and
transport mechanisms in geological porous media such as reservoir rocks. This effort has …

Coal has a heterogenous porosity that influences its specific surface area (SSA) and CH 4
adsorption and desorption. However, the pore size distribution obtained with N 2 adsorption …

Small pores in high specific surface clay-rich caprocks give rise to high capillary entry
pressures and high viscous drag that hinder the migration of buoyant carbon dioxide CO 2 …

Unconventional natural gas, including coalbed methane and shale gas, has become
important natural gas resources. Coal and shale reservoirs are characterised by low porosity …

Characteristics of sorption and distribution of water in nanoporous shale are topics of great
interest to evaluate unconventional reservoirs. Also, a study of surface force of water/solid …

In this study, laboratory tests using six-cycles of nitrogen (N 2) injection were carried out to
investigate nitrogen flushing effect on coal seam gas recovery. In each test, N 2 was injected …

The evolution of coal permeability is very complex under the influence of coupled multiple
processes. This is the primary motivation why numerous coal permeability models have …

Coal bed methane (CBM) is a primary clean energy source found in coal seams. The
recovery ratio of CBM is very low, especially with ground extraction, due to the strong …

The gas permeability of coals varies with effective stress increase, matrix shrinkage/swelling
due to gas desorption/adsorption, gas slippage and other factors. In this paper, the nature of …