Study Characteristics of Reservoir Properties on No.15 Coal Seam in Yangquan Mining Area

Yangquan Mining Area is one of the largest anthracite production base,No.15 coal seam is the of main mining seams in this area.This article is based on coal geological exploration and coalbed methane well testing,it studied the characteristics of reservoir properties on No.15 coal seam in combination with analysis data by laboratory testing.The results show that there were high degree thin-anthracite coal on No.15 coal seam;the depth is 400～800 m;the thickness is 2.00～11.00 m,average is about 6.50 m,the thickness distribution of coal seam has obvious differentiation,the general trend is from north to south and from west to east;the permeability is 0.43×10-3 um2,belong to the lower-middle level;the reservoir pressure is 4.67 MPa;pressure gradient is 0.85 MPa/hm,belong to a little under-voltage reservoir;the temporary storage of pressure ratio is relatively low,it's difficult to drainage buck aspects for the coalbed methane.