Sequence division and coal facies research methods of the deep No. 8 coal seam in the Daning-Jixian Block, eastern margin of Ordos basin.

ABSTRACT: With the large-scale commercial development of deep coalbed methane in the Ordos Basin, the refined research on deep coal seams (with a burial depth > 2000 m) has begun to attract much attention. In this study, the No. 8 coal seam of the Taiyuan Formation in the Daning-Jixian Block on the eastern margin of the Ordos Basin was taken as the research object. By combining sequence stratigraphy theory and coal facies research methods, and using the Support Vector Regression (SVR) model optimized by the Sparrow Search Algorithm (SSA) as well as the clustering algorithm, SSA-SVR models based on logging parameters for calculating the vitrinite-inertinite ratio (V/I ratio) and the Texture Preservation Index (TPI) value, along with a coal facies division scheme suitable for the Daning-Jixian Block,

SUBMITTER: Kong J 

PROVIDER: S-EPMC12715261 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature