| Citation: | WU Jian，YANG Haoyu，XU Yanyong，et al. Reservoir characteristics and development control factors of Benxi Formation bauxite in the Linxing area of Ordos Basin[J]. Bulletin of Geological Science and Technology，2025，44（5）：1-12 doi: 10.19509/j.cnki.dzkq.tb20230657
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In recent years, the bauxite gas exploration of the Taiyuan Formation in the Longdong area of Ordos Basin has made a breakthrough, which has attracted wide attention at home and abroad. During the same period, the bauxite rock gas of the Benxi Formation in the Linxing area has also made some progress; however, the characteristics and controlling factors of the bauxite reservoir in this area remain unclear, which restricts the exploration process.
To identify the reservoir characteristics and influencing factors of Benxi Formation bauxite in the Linxing area,
the paper carried out XRD, cast sheet imaging, SEM-EDS, mercury intrusion porosimetry, nitrogen and carbon dioxide adsorption, and routine porosity measurements, coupled with seismic logging data, to characterize the mineral composition, pore structure, and physical properties of the bauxite reservoir and to discuss the controls on its development.
The results show that the aluminum-bearing minerals in Benxi Formation bauxite in the Linxing area are dominated by dispore. Pore types are primarily intra-granular, intergranular, matrix, and microcrack pores, with occasional organic pores. Pore volume is mainly contributed by mesopores and macropores, with pore-size peaks mainly at 30−70, 80−130,
The research results can provide theoretical guidance for the bauxite gas exploration.
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