煤储层孔、裂隙系统分形研究

对煤层、煤样进行了宏观裂隙及显微裂隙的连续系统观测、统计，计算了煤中各级别裂隙的面密度维数；根据压汞法测出的煤中不同孔径段的连续比孔容数据，计算了煤中孔隙体积的分形维数。分析了分形九与煤层的孔、裂隙发育程度和煤变质程度的关系。为评革层气的吸附与解吸、扩散与渗流、煤与瓦斯突出预测及煤层有效渗透率估算提供了一种更加精确的方法。

Research on Fractals of Pore and Fracture-Structure of Coal Reservoirs

Coal reservoirs are ternary structure system containing macrofratures, microfractures and pores. Based on statistics of macrofratures and microfractures measured continuously, and data of the special hole volume measured in sections of different diameters by mercury porosimeter, pores and fractures of coal reservoirs were systematically researched through fractal analysis. The results show that the pore and fracture structure with different origination correspond to different invariable ranges of scale. To denote quantitatively the characteristics of pore and fracture structure in coal reservoirs, a few fractal dimensions are necessary. Fractal dimensions can reflect status of pores and fractures of coal reservoirs and their distribution rules, and so are significant in the research of adsorption and permeability of coalbed methane.