Coal reservoir characteristics and prospective areas for Jurissic CBM exploitation in western Ordos basin

On the basis of systemic sample collection,by analyzing macerals,micro-fracture,facies,quality and mercury injection test on coal samples,the authors systematically studied the physical characteristics of Jurassic coal bed methane reservoirs in western Ordos basin.And the favorable area was calculated using multi-level fuzzy evaluation method.The results show that the Jurassic coal bed methane(CBM) reservoir in western Ordos basin has great gas potential,and its pore system has bimodal distribution,and is dominated by micropores,mini pores and macropores.The Erdaoling-Rujigou region is considered as the most favorable target area for CBM development.