Study on Pore Structure Characteristics of tight Sandstone Reservoirs -- Taking Chang 8 in XX block of Ordos Basin as an exampleBinhu Han, Wenbo Qiu, Zhifei Sun, Dingjun Wang and Yicang LiuE3S Web Conf., 560 (2024) 01011DOI: https://doi.org/10.1051/e3sconf/202456001011