To ascertain the adsorption characteristics of coal reservoirs in the Ewirgol mining area of the western margin of Turpan-Hami Basin

this paper systematically collected and sorted the coal rock and coal quality data and isothermal adsorption data and analyzed it. The adsorption characteristics of coal reservoir were clarified and the relationship between the depth

coal rank

coal microscopic components and coal quality with adsorption characteristics were analyzed. The research shows that the Langmuir volume of coal reservoirs in the study area ranges from 14.37 m3/t to 27.84 m3/t

with an average of 25.07 m3/t. The Langmuir pressure falls between 1.14 MPa and 3.45 MPa

with an average of 1.77 MPa. Under the combined action of temperature

pressure

porosity and other factors

the adsorption capacity of coal reservoirs exhibit a positive correlation between with buried depth and a “high-low-high” change law with the increase of coal rank. The adsorption capacity of coal reservoir increases and decreases with the increasing vitrinite content and inertinite content

respectively. The greater the moisture and ash yield in the coal

the weaker the adsorption capacity of coal. On the whole

the adsorption capacity of the coal reservoir in the study area is strong and is evidently dependent on the burial depth

and the deep coal reservoir has a good potential of CBM resources.