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针对目前对采动影响下煤储层渗透性变化规律认识不清,直接影响了煤矿采动区煤层气地面抽采部署的问题,以两淮矿区为研究对象,通过分析大量采动区煤层气抽采井数据,结合现场监测结果,利用数值模拟技术进行了采动影响下煤层渗透性变化特征研究。研究确定了采动影响下煤层气井的抽采范围和边界条件,揭示了煤层渗透性变化规律,建立了采动影响下被保护煤层渗透率随工作面推进距离的关系。
Aiming at the current unclear understanding of coal reservoir permeability changes under the influence of mining, it has a direct impact on the CBM ground pumping and deployment in the coal mining area. Taking the coal mine and Huainan mining area as the research object, by analyzing a large number of CBM Draw well data, combined with field monitoring results, the use of numerical simulation technology under the influence of mining coal seam permeability change characteristics. The study determines the mining range and boundary conditions of coalbed methane wells under the influence of mining, reveals the changing law of coal seam permeability and establishes the relationship between the permeability of coal seam under protection and the propulsion distance of working face.