内蒙古扎鲁特旗林西组页岩沉积环境的地球化学表征

摘要

This paper discusses the characteristics of the sedimentary environment of Upper Permain Linxi Formation in the Jarud area of Inner Mongolia.Based on the field investigation and data analysis of biomarkers and microelements, the relatively favorable correspondence and mutual complementation in geological information are presented.The residual oceanic environment is the considered to exist under the condition of convergence between 2 continental plates during Late Permian.The distribution of the Linxi Formation shale should consequently be stable.The potential of study area exits in favorable shale hydrocarbon area.But the relatively high degree of the thermal evolution of the organic matter in the shale can become a risky factor in the oil and gas exploration.%探讨内蒙古扎鲁特旗地区上二叠统林西组对应地质时期的沉积环境特点。在对该区及周缘的区域地质进行野外调查和资料调研的基础上，通过对页岩中生物标志化合物与微量元素的研究，饱和烃生物标志化合物和微量元素特征所揭示的相应地质信息展现出较好的一致性和互补性，认为林西组暗色富有机质泥页岩为陆壳贴合背景下的残余海盆沉积，展布应具有稳定性；该区具有成为泥页岩油气有利勘探区的潜力，但较高的有机母质成熟度可能为泥页岩油气勘探开发中的风险因素。