It has become an inevitable trend of human development to seek resources from the deep
underground. However, rock encountered in deep underground engineering is usually in an …

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 …

Steady-state flow methods are widely applied in the laboratory where permeability evolution
is typically evaluated assuming a uniform pressure gradient along the sample. The accuracy …

The significant effect of gas sorption induced swelling on shale permeability has been
observed through laboratory measurements and explained through permeability models …

Coal permeability measurements are normally conducted under the assumption that gas
pressure in the matrix is equalized with that in fracture and that gas sorption-induced …

Permeability of coal reservoirs influence the extraction of coal gas from coal seams. Twelve
coal samples were collected at an anticline and a syncline of the No. 3 coal seam in the Sihe …

Understanding the evolution of shale permeability is critical in efficiently recovering gas from
shale reservoirs. Two representative profiles of permeability evolution are typically …

In the context of convection-heating-based in situ oil shale retorting, fractures serve as
primary pathways for fluid migration and product extraction. This study investigates the …

The sensitivity of coal reservoir is an essential reason decreasing the coalbed methane
(CBM) production during the CBM development. Whether the acid sensitivity is a negative or …

Coal deformation during gas depletion primarily involves the effective stress controlled bulk
compression and gas sorption/desorption-induced coal matrix swelling/shrinkage. The two …