Organic Geochemical Features of the Upper Paleozoic Coal-Bearing Deposits in Ordos Basin, North-Central China

The exploration of hydrocarbon resources plays a critical role in fulfilling the world’s increasing demand for energy. In this regard, distribution and source rock characteristics coal measure stratum whole basin are important must be studied. However, systematic research has not been conducted yet. study, organic geochemical data, drilling fieldwork were used to examine Upper Paleozoic stratum. results revealed that coal-bearing series mostly present Benxi, Taiyuan, Shanxi formations, mudstones coals formed frequently tidal flat deposits. layers mudstone primarily thick on western sides, eastern northern thin middle region, gradually thinner from north south. rocks enriched east west basin. Rock-Eval pyrolysis analysis indicated overwhelming majority comprises excellent rocks, all limestones poor most good–excellent rocks. kerogen type samples is Ⅲ, suggesting typical “gas source” kerogen. Humus derived terrestrial organism aquatic algae remnants, indicating diversified parent material input. These evidence studied at postmature-dry gas stage.