Gas and water distribution of Ordovician Majiagou Formation in northwest of Ordos Basin, NW China

Paleogeomorphological reconstruction and geological implications of the weathered-crust karst on the top of the Middle Triassic Leikoupo Formation in the Longgang area, Sichuan Basin, China

“…With progress in seismic technology (Arfai et al., 2016; Back et al., 2011; Kolla et al., 2007; Posamentier and Kolla, 2003; Sayago et al., 2012; Sullivan et al., 2011; Zeng et al., 2011) and the study of karst systems (Bacetaet et al., 2007; Cao et al., 2015; Feng et al., 2013; Filipponi et al., 2009; Jin et al., 2009; Li et al., 2008; Loucks, 1999; Loucks and Handford, 1992; Mehrabi and Rahimpour-Bonab, 2014; Palmer, 1991, 1995, 2007; Whiteet et al., 1995; Xiao et al., 2016), the precision of paleogeomorphological reconstructions has gradually improved. Through the fine characterization of karst paleogeomorphology, the relationships between karst geomorphic units and oil and gas have been clarified for the Ordovician strata in the Tahe Oil Field (Li et al., 2016; Zhang, 2001) and the Ordos Basin (Yu et al., 2016; Zhang et al., 2014) in China. The widely and stably distributed weathered-crust karst reservoirs on the top of the Lei 4 3 submember are thought to have huge exploration potential (Ding et al., 2012; Tan et al., 2014; Wu et al., 2017; Zhong et al., 2011).…”