基于产气量模拟的采动影响下煤层渗透性变化规律

Permeability Change Laws of Coal Seam Under Mining Influence Based on Gas Production Simulation

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 problem that the low level understanding of coal reservoir permeability changes under mining influence nasa direct impact on coal - bed methane ground drainage of mining area, we conducted a study on coal seam permeability change character- istics under mining influence in Huainan and Huaibei Mining Area as the object through the analysis of a large number of coal seam gas drainage data of mining areas combined with field monitoring results and the numerical simulation technology. The scope and boundary conditions of the gas wells under the mining influence are determined, and the change laws of permeability of the coal seam is revealed, and the relationship between the permeability of the coal seam and the advancing distance under the mining influence is established.