摘要
1 Introduction Permeability of Member-6, Member-7, and Member-8, Triassic Yangchang Formation in Ordos Basin is lower than 1？0-3μm2, so sandstone in those formations are typical tight reservoir（ Zhao et al., 2012a, 2012b; Yang et al.,2013）.
1 Introduction Permeability of Member-6, Member-7, and Member-8, Triassic Yangchang Formation in Ordos Basin is lower than 1？0-3μm2, so sandstone in those formations are typical tight reservoir（ Zhao et al., 2012a, 2012b; Yang et al.,2013）.
