Recently, deep and ultra-deep shales (depth >3500 m) of the Lower Paleozoic Wufeng–Longmaxi formations (WF–LMX) have become attractive targets for shale gas exploration development in China, their contents may be influenced by occurrence water to some extent. However, content its distribution different nanopores rarely been reported. In this study, a suite WF–LMX samples (5910–5965 m depth) ...