上扬子东部地区五峰组-龙马溪组笔石有机质对埋藏有机碳的贡献及其地质意义

项目名称： 上扬子东部地区五峰组-龙马溪组笔石有机质对埋藏有机碳的贡献及其地质意义

项目编号： No.41503028

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 天文学、地球科学

项目作者： 罗情勇

作者单位： 中国石油大学（北京）

项目金额： 21万元

中文摘要： 奥陶系五峰组-志留系龙马溪组富有机质页岩是中国上扬子地区最重要的烃源岩层和页岩气储层之一，该套页岩层系富含笔石，但是如此丰富的笔石对埋藏有机碳贡献量的多少却未引起应有的重视，这种忽视可能会影响评价页岩有机质类型、有机质成熟度、生烃潜力、储层特征和含气性等。本项目拟通过有机岩石学和油气地球化学等探讨上扬子东部地区五峰组-龙马溪组富有机质沉积中笔石有机质对埋藏有机碳的贡献，在此基础上，通过岩石物理学和热-压模拟实验等分别研究笔石有机质的微观结构特征和笔石有机质物理与化学性质对热演化的响应特征。这项研究不仅有助于了解笔石有机质对埋藏有机碳的贡献以及笔石有机质的化学、物理特性和生烃潜力，而且还有助于指导上扬子地区页岩气的勘探，具有重要的科学和现实意义。

中文关键词： 笔石有机质；埋藏有机碳；显微组分；干酪根；生烃潜力

英文摘要： The organic-rich shales of Wufeng-Longmaxi Formation (Ordovician-Silurian) are one of the most important hydrocarbon source rocks and shale gas reservoirs in the upper Yangtze region of China. The graptolites are enriched in these shales, however, their contribution to the burial organic carbon has not caused the attention that they deserve. This neglect could affect the evaluation of organic matter type, organic matter maturity, hydrocarbon generation potential, reservoir characteristics, gas contents and so on. Organic petrology and petroleum geochemistry are employed to determine the contribution of the graptolites to the burial organic carbon in these organic-rich shales. On this basis, we will investigate the microstructure characteristics of the graptolites and the variation of physical and chemical properties of the graptolites to the thermal evolution by the petrophysics and the pyrolysis simulation experiment, respectively. This project will not only be helpful to understand the contribution of the graptolites to the burial organic carbon, the physical and chemical properties of the graptolites and the hydrocarbon generation potential of the graptolites, but also guide the exploration of the shale gas in the upper Yangtze region. Thus, this project has important scientific and practical significance.

英文关键词： Graptolite;Burial organic carbon;Maceral;Kerogen;Hydrocarbon generation potential