Permeability in each core plug was measured with helium gas with a steady-state technique for samples with permeability >0.1 md and by pulse decay for samples with permeability . 0.1 md.

Wei Guo, Zhiming Hu, Xiaowei Zhang, Rongze Yu, Li Wang, Shale gas adsorption and desorption characteristics and its effects on shale permeability, Energy Exploration & Exploitation, Vol. 35, No. 4, ...

Low and ultra-low permeability sandstones account for much of the increase in gas reserves in China. Effectively developing these reservoirs has been a research focus in the region. Low and ultra ...

BEIJING, June 15, 2023 /PRNewswire/ -- A report from cnenergy.com:Coalbed methane is a kind of very important unconventional natural gas, it is of ...