内蒙古东部中上二叠统烃源岩地化特征与生烃潜力评价

发布时间：2018-03-25 03:23

  本文选题：哲斯组　切入点：林西组　出处：《大庆石油地质与开发》2017年01期

【摘要】：内蒙古东部地区是油气深部勘探的重点地区。为评价深部源岩层中上二叠统的油气资源前景,在野外地质勘查、典型剖面实测和样品分析测试的基础上,通过有机质丰度、类型、成熟度等地化指标,有机岩石学方法,生物标志化合物以及生烃热模拟实验,对中二叠统哲斯组和上二叠统林西组暗色泥质烃源岩的分布、地化特征和生烃潜力进行研究。研究表明:哲斯组为浅海—半深海相,林西组为近海湖盆—残余海相,两套地层均广泛发育巨厚层暗色泥岩;有机质丰度以中等—好烃源岩为主,类型主要为Ⅱ2—Ⅲ型,处于过成熟演化阶段,有机质以陆源高等植物和水生藻类等混源为主,沉积水体为具有一定盐度的强还原—还原环境;哲斯组和林西组具有一定的生气能力,最大生烃量分别达0.62 m3/t和2.48 m3/t。哲斯组和林西组作为潜在的气源岩,具有良好的天然气勘探前景。
[Abstract]:The eastern part of Inner Mongolia is a key area for deep exploration of oil and gas. In order to evaluate the prospects of oil and gas resources in the middle and upper Permian strata of deep source rock, the abundance of organic matter is obtained through the field geological exploration, the measurement of typical sections and the analysis and test of samples. Types, maturity and other geochemical indicators, organic petrology methods, biomarkers and thermal simulation experiments of hydrocarbon generation, distribution of dark muddy source rocks in the middle Permian and the Upper Permian Linxi formation, The geochemical characteristics and hydrocarbon generation potential are studied. The results show that the Zesi formation is shallow to semi-deep sea facies and the Linxi formation is offshore lake basin residual marine facies. The abundance of organic matter is mainly intermediate-good source rock, the type is mainly type 鈪，

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