Abstract:?Large-scale tight sandstone gas reservoirs were developed from the Upper Paleozoic in the Linxing block on the eastern edge of the Ordos Basin, with Benxi, Taiyuan, Shanxi, Xiashihezi, Shangshihezi, and Shiqianfeng Formations from the bottom to the upper Paleozoic. Tight sandstone reservoirs have the characteristics of low porosity, low permeability and strong heterogeneity, and the distribution of sand bodies varies greatly on the plane. Considering domestic research on unconventional tight sandstone reservoirs has entered into a critical stage, the sharing of tight sandstone petrological data in Linxing block is particularly important. To this end, a total of 305 Upper Paleozoic rock thin sections were collected from the Benxi, Taiyuan, Shanxi, Xiashihezi, Shangshihezi, and Shiqianfeng Formations and were taken photos by polarized light microscope. The major rock type is arkose quartz sandstone, followed by lithic quartz sandstone and quartz sandstone. This dataset covers 24 wells in the Linxing block, which record in details the location, stratigraphic age, and rock characteristics of the samples. These rock microscopic image data can be widely used not only in basic geological research, but also in interdisciplinary research such as cooperative research integrating computer artificial intelligence. It also provides data support for unconventional oil and gas exploration, development and research.
Keywords:?thin section;?tight sandstone;?Linxing block;?Upper Paleozoic;?Ordos Basin