Effects of seam conditions, injection pressure and gas composition on CO2 sequestration in coal

Abstract

Carbon dioxide (CO2) sequestration in deep coal seams has been identified as one of the potential methods to reduce CO2 emission into the atmosphere. In this paper, a commercial coalbed methane reservoir simulator, COMET 3, was used to study the effects of seam conditions such as temperature and moisture content of the coal, and injection pressure and gas composition on CO2 sequestration in coal. A 500×500×20 m coal layer, which is lying 1000m below the ground surface, was simulated in the model. CO2 was injected from the bottom center of the coal layer for 10 years using a well of 0.1 m diameter. Four scenarios were simulated by changing the temperature and moisture content of the coal seam..