Abstract: Low-resistance gas reservoir is hard to identify with conventional logging and analysis technique because of its complicated genesis,and often can be missed in the interpretation section.Dual-water analysis was proposed to identify low-resistance gas reservoir by analyzing its sedimentary structure and geologic and physical origins.Dynamic T2 cutoff value method was applied to handle nuclear magnetic resonance when treating bound water saturation.That is to get key nuclear magnetic resonance parameters suitable in place on the base of theoretical research and great quantities of core sample test data,and then to acquire bound water saturation and mobile gas saturation.Results show that by comparison of obtained bound water saturation and water saturation,it is easy to find formation and identify reservoir and effectively.Practice proved that this method is completely suitable for distinguishing low-resistance gas reservoirs.