【摘要】 【目的】研究淮南煤田煤系下二叠统泥页岩的矿物组成和页岩气储集层物性，评价淮南煤田不同矿物对页岩气储层的影响。【方法】以淮南煤田潘集外围地区下二叠统上石盒子组、下石盒子组和山西组泥页岩为研究对象，通过X射线衍射实验，探究不同组成成分对页岩气储层的影响。【结果】结果表明：研究区泥页岩矿物组成以脆性矿物和黏土矿物为主，其中脆性矿物中石英占90%以上，其次含少量钾长石和钠长石，黏土矿物以高岭石和伊/蒙混层为主，少量绿泥石和伊利石。【结论】黏土矿物有利于页岩气吸附，研究区石英等脆性矿物含量相对较低，应采取合适的压裂技术进行开采。更多还原

【Abstract】 [Purposes] This research focuses on the mineral contents and physical properties of the shale gas reservoir in the lower Permian mud shale system of Huainan Coalfield, and the effects of different minerals on shale gas reservoirs in Huainan Coalfield are analyzed. [Methods] In this study, taking the upper Stone Box Formation, lower Stone Box Formation and Shanxi Formation mudstones of the Lower Permian Formation of the Huainan Coalfield as the research objects. Totally 70 samples of the Lower Permian of the Huainan Coalfield are qualitatively and quantitatively analyzed by X-ray diffraction experiments, and the effects of different compositions on shale gas reservoirs were explored. [Findings]The results show that the mineral composition of mud shale in the study area is dominated by brittle minerals and clay minerals, of which quartz accounts for more than 90% of the brittle minerals, followed by a small amount of potassium feldspar and sodium feldspar. Clay minerals are dominated by kaolinite and illite/smectite, and a small amount of chlorite and illite. [Conclusions] Clay minerals are conducive to shale gas adsorption, and there are relatively few brittle minerals such as quartz in the study area, and suitable fracturing techniques should be adopted for mining.更多还原