Influence of high-temperature thermal cycles on the pore structure of red sandstone

Analyzing variations in rock pore structure under high-temperature thermal cycles is of great significance for the development of deep resource. In this paper, red sandstone from Linyi, Shandong Province, was heated to 200 °C, 400 °C, 500 °C, and 600 °C, followed by five cold thermal cycles. The transverse relaxation times (T2) of red sandstone treated at various temperatures were observed using nuclear magnetic resonance (NMR), and the porosity...