Researches on Hydro-frac Induced Reservoir Damage to Anthracite Coal Seams of Southern Qinshui Basin

摘要

There are over 600 CBM wells in southern Qinshui basin, which account for more than 50% of the number in China. Anthracite ranked coal seams of southern Qinshui basin feature high adsorption capacity, low pressure and low permeability, therefore, selection of hydro-frac liquid and proportion of organic additives of the liquid are the top important things of reservoir protection. As a reference for CBM practitioners, this article outlines reservoir properties of southern Qinshui basin and research achievements on mechanism of hydro-frac induced reservoir damage, characteristics and sensitivities of the damages.