济阳坳陷古近系页岩层系中亮晶方解石成因及意义

陆相页岩油是我国未来油气勘探的重要接替领域，厘清储层形成机理和烃类富集模式是实现陆相页岩油高效勘探开发的基本前提。我国中东部陆相页岩层系中亮晶方解石普遍发育，赋存类型多样，其形成贯穿于页岩成岩演化的多个过程，对页岩油储层形成和烃类富集具有重要意义。本项目以济阳坳陷古近系页岩为研究对象，利用多维度不同尺度的观察及定量测试手段，精细刻画亮晶方解石类型及赋存特征；开展实例解剖-成岩物理模拟-数值模拟综合研究，揭示不同类型亮晶方解石形成的动力学过程，明确其发育背景和形成条件；分析亮晶方解石形成过程中储集空间形成和烃类运聚效应，最终阐明亮晶方解石发育与页岩油储层形成和烃类富集的匹配机制。研究成果将为济阳坳陷陆相页岩油勘探提供理论支撑，并发表4篇以上国际知名期刊SCI论文。

Lacustrine shale oil is an important succeeding field for oil and gas exploration in China. Understanding the reservoir formation mechanism and hydrocarbon enrichment model is the basic premise for efficient exploration and development of lacustrine shale oil. Sparry calcite is well developed in lacustrine shales in Central to East China, with complex occurrence varieties. The sparry calcite can be formed through many processes of shale diagenetic evolution and is of great significance to shale oil reservoir formation and hydrocarbon enrichment. This project takes the lacustrine shale in the Eocene Jiyang Depression as a research target, using the multi-dimensional observation and quantitative analytical methods at different scales, clarifying the sparry calcite types and characteristics. An integrated study invoking case analysis-diagenetic simulation-hydrocarbon simulation-numerical simulation, aims at revealing the dynamic process of different types of sparry calcite formation, and analyzing its development background and formation conditions. The storage space formation and hydrocarbon migration and accumulation will then be analyzed. Finally, a comprehensive matching mechanism of the reservoir formation and enrichment of shale oil will be established. The project aims to provide theoretic support for lacustrine shale oil exploration and publish more than 4 papers in renowned SCI-indexed international journals.