新集矿区煤储层渗透性与地应力关系研究

Relationship between Permeability and In-situ Stress in Coal Reservoir of Xinji Mine

根据水力压裂法对新集矿区山西组的S5、S9测孔的原地应力进行测试,研究煤储层的地应力分布规律,建立煤储层地应力与煤层埋藏深度的关系模型;通过对煤岩体内裂隙随正应力的变形研究,建立三维渗透率-地应力关系模型。为煤层气勘探与开发提供理论指导。

According to hydraulic fracturing method to measure in-situ stress of S5 and S9hole in Shanxi group of Xinji mine, the in-situ stress distribution of coal reservoir was studied, the correlations and their models between in-situ stress in coal seams and the burial depth of coal seam were established. Through the research on deformation of fracture with the normal stress in coal and rock mass, the relationship and constitutive model between in-situ stress and 3D permeability was set up.In-situ stress provides theoretical guidance for coalbed methane exploration and development.