【摘要】 为了揭示煤系泥页岩的吸附与含气特征,基于山西省域煤田、准噶尔盆地等地200余件煤系泥页岩的含气量、等温吸附、高压压汞、液氮吸附及XRD衍射等实测数据,对煤系泥页岩吸附性与含气性特征进行了分析,并对其影响因素进行了讨论。结果表明煤系泥页岩实测含气量0～5.87cm~3/g,集中于0.90～2.00 cm~3/g;最大吸附量VL 0.11～6.3 cm~3/g,平均为1.57 cm~3/g;pL 0.16～8.65 MPa,平均为3.28 MPa;VL与孔隙度、有机质丰度、有机质成熟度、黏土矿物质量分数呈现出正相关关系,与伊蒙混层质量分数、平均孔径呈现出负相关关系。更多还原

【Abstract】 In order to reveal the adsorption and gas-bearing characteristics of shale in coal measures, this study was based on the gas content, isotherm adsorption, high-pressure mercury injection, and liquid nitrogen adsorption of more than 200 coal shale in six major coal fields in Shanxi Province and Junggar basin. XRD diffraction and other measured data, the adsorption and gas characteristics of shale were analyzed, and the influencing factors were discussed. The results show that the measured gas content of shale is between 0-5.87 cm~3/g, concentrated at0.90-2.00 cm~3/g; VL is between 0.11-6.3 cm~3/g with an average of 1.57 cm~3/g. The adsorption capacity of shale gas was strong; pL ranged from 0.16 to 8.65 MPa with an average of 3.28 MPa; the maximum adsorption capacity was positively correlated with porosity, organic matter abundance, organic matter maturity, and quality score of clay mineral. The relationship is negatively correlated with the quality score of illite-montmorillonite mixed layer and the average pore size.更多还原