Abstract： Xiangning mining area is located in the southern part of Hedong coalfield in the eastern margin of Ordos Basin. In order to build a green mine and develop coalbed methane green energy, it is necessary to study the law of coal accumulation and gas control. In this paper, the coal accumulation law and gas control effect of Carboniferous-Permian coal-bearing strata in Xiangning mining area were taken as the research object. Through the analysis of drilling data, coalbed methane well test data, laboratory test data, core data, microscopic observation and identification results in this area, the sedimentary environment, coal accumulation law, reservoir physical characteristics, source rock characteristics and gas content of coal-bearing strata in this area were studied. The results showed that the main mineable coal seams in this area were stable and thick. The No.2 main coal seam was formed in the shallow water delta diversion bay area. The coal seam accumulation period was relatively stable, the coal-forming material was sufficient, the accumulation and compensation were balanced, and the peat swamp was developed. The No.10 main coal seam was formed after the long-term expansion of the lagoon and tidal flat. The climate was suitable, the plants were lush, the coal-forming materials were rich, and the sedimentary compensation was balanced. The average buried depth of No.2 coal seam was 750 m, and the average buried depth of No.10 coal seam was 810 m. The buried depth was moderate. The research on coal accumulation law and gas control could provide theoretical guidance for the exploration and development of coal and coalbed methane in this area.
孙国忠. 乡宁矿区聚煤规律及控气作用研究[J]. 煤炭与化工, 2023, 46(6): 67-71.
Sun Guozhong. Study on coal accumulation law and gas control effect in Xiangning mining area. CCI, 2023, 46(6): 67-71.
