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Pore structure is of great importance in the occurrence of shale gas. In this study, pores in shale samples from the Lower Silurian Longmaxi and Lower Cambrian Niutitang shales in Chongqing, in the Upper Yangtze Platform, South China, were examined using focused ion beam–He ion microscopy (FIB–HIM), nano-computerized tomography (nano-CT), and gas adsorption analysis. The results show that most pores...
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