Abstract: For the characteristics of large number and thickness of coal seams and tight sandstones in the coal-bearing rock series in Hegang Basin, the characteristics of coal rock, sedimentary environment, reservoir thickness, sealing characteristics, and gas-bearing characteristics were studied. Combined with the drilling and gas logging data from Niaoshan well 1 in the study area, the co-exploration potential of coalbed methane and tight sandstone gas(“two gases”) in Hegang basin was evaluated. The results showed that the main thick coal seams in Hegang Basin are located in stratigraphic sequence Ⅱ(that is, the upper part of Chengzihe Formation), and the sedimentary system is dominated by fluvial-upper delta plain, which is a favorable facies zone for the formation of coal measures source rocks and tight sandstone. The distribution of coal seams in the coal-bearing strata of Chengzihe Formation is stable, the cumulative thickness ranges from 30 m to 75.99 m, and the cumulative thickness of tight sandstone strata ranges from 9 m to 43.03 m. Coal seams and sandstone strata overlap and coalbed methane and tight sandstone gas are superimposed to form reservoirs. The results of gas logging in Niaoshan well 1 show that there are abnormal high values of total hydrocarbon in both coal seam and tight sandstone.