河南省煤田构造格局对煤层气储层物性和渗流特征的影响

为了查明河南省不同构造区内二1煤层中气体的流动特征和煤体受构造变形分异后的独特性，采用实验数据分析、瓦斯地质和渗流学理论，研究煤中孔容分布、孔径受应力影响后的变化以及煤体强度受构造应力作用下的变形和破坏特点。结果表明，煤层中甲烷连续流型占优的排序为:太行构造区、崤熊构造区、嵩萁构造区。煤中甲烷流型差异受区域构造变形体制控制，太行构造区的拉伸变形导致煤体强度值域分布广，最大体应变大于其他区域；嵩萁构造区的重力滑动、剪切和伸展变形使煤体强度和孔隙率最低、最大体应变最小；崤熊构造区内煤体的最大体应变介于两者之间。该结论对河南省煤层气开发有指导意义。 

Influence of structural framework of coalfield on physical properties and seepage characteristics of reservoir in Henan Province

In order to find out the characteristics of gas flow characteristics in coal seams in different tectonic zones in Henan Province and to discover the uniqueness of the structure and deformation of coal mass, based on the experimental data analysis and gas geology and seepage theory, the changes of pore volume distribution and pore sizes under the influence of stress as well as the deformation and failure characteristics of coal strength in coalfield under the action of tectonic stress were studied. The results of the study show that the ranking of the dominant sequence of methane flow in coalbed is Taihang tectonic belt > Xiaoxiong tectonic belt > Songqi tectonic belt. The differences of patterns of methane flow in coalbed were controlled by the regional tectonic deformation system, the tensile strain of coal mass in Taihang tectonic zones caused wide distribution rang of strength of coal mass, higher porosity and largest max volumetric strain, the gravity slide and shearing and extension deformation in Songqi tectonic belt brought out lowest strength of coal mass, lowest porosity and least maximum volumetric strain in the three coal seams, the maximum volumetric strain of coal mass in Xiaoxiong tectonic belt was between that of Taihang tectonic belt and Songqi tectonic belt. The conclusion has guiding significance for CBM development.