Characterization of favorable lithofacies in tight sandstone reservoirs and its significance for gas exploration and exploitation: A case study of the 2nd Member of Triassic Xujiahe Formation in the Xinchang area, Sichuan Basin

LIU Junlong,LIU Zhongqun,XIAO Kaihua,HUANG Yanqing,JIN Wujun

Table 2 Correspondence of sedimentary microfacies and lithofacies associations of the T3x2 Member in Xinchang tectonic zone.

Major sedimentary microfacies Lithofacies association Underwater distributary channel CMpp, CMpl, CMms, CMmc, CMcr, CMcr, CMcb, CMmst, CMcbt Interdistributary bay MScl, MScr Mouth bar CMcb, Fcb, Swb Sheet sand bar Fcb, Swb