Coalbed methane (CBM) drilling technology is critical in achieving efficient CBM
development. The geological conditions for CBM development in China are complex …

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

Liquid nitrogen freeze–thaw has been used in oil, shale gas and coalbed methane
exploitation as an efficient fracturing technology. This paper aimed to study the effect of …

In recent years, shales have attracted increased attention as a potential source of natural
gas. In the US, recovery of natural gas from shales is expected to grow significantly in the …

Abstract Liquid nitrogen (LN 2), a non-aqueous medium, has attracted attention in recent
years as a fluid for fracturing in the petroleum/energy industry. This study proposes a freeze …

Freezing and thawing cycles occur with cyclic liquid nitrogen (LN2) injection in coal. The
freeze–thaw treatment damages the pore structure of coal and thus increases its …

Coal is a complex dual-porosity porous medium that consists of both fractures and coal
matrices containing pores. The gas seepage characteristics in coals are closely related to …

With 59 sets of well testing data from 32 wells, 70 coal seam gas data from 9 wells, and
production data from 17 wells, the in situ stress distribution within depths of 136-1244 m and …

Gas desorption property of coal is closely related to pore distribution, and the accurate
characterization of pore structures is of great significance for gas flow in coal seams. In this …

It is well known that the deformation of coal will implicitly influence the fluid flow transport
properties due to the coupled stress-permeability evolution. The stress-induced structural …