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| 1 | 页岩中固体沥青的识别、演化路径及地质意义——以松辽盆地白垩系青山口组一段为例显示文摘在梳理国内外页岩固体沥青研究现状的基础上,以松辽盆地白垩系青山口组一段富有机质页岩为例,对固体沥青的定义、分类、赋存形式和演化路径进行深入研究,探讨固体沥青对成熟度的指示意义及其对储集空间发育的影响。研究表明:①原生显微组分类型差异是造成固体沥青演化路径不同的主要原因,油前沥青多为原位固体沥青,而油后沥青和焦沥青则多为迁移固体沥青;②在未成熟—生油阶段早期,沥青质体、镜质体、惰质体可通过光学特性观察与固体沥青进行区分,藻类体可通过荧光特征与固体沥青进行区分;③扫描电镜下可有效识别原位和迁移固体沥青,受脂族结构减少、芳构化增强的影响,固体沥青反射率随着镜质体反射率的增加而呈线性增加;④生油窗内的固体沥青主要发育残留孔、脱气裂缝和气泡孔3种次生孔隙类型,高成熟阶段的焦沥青发育海绵状孔隙;⑤扫描电镜结合激光拉曼光谱等原位分析技术的应用,可以反映不同类型固体沥青的结构信息,用于有机质迁移路径、动力等微尺度研究。 | 柳波 王柳 付晓飞 霍秋立 白龙辉 吕建才 王博洋 | 2023 | 石油勘探与开发2023，50，6： | 0 |
| 2 | Identification, evolution and geological indications of solid bitumen in shales: A case study of the first member of Cretaceous Qingshankou Formation in Songliao Basin, NE China显示文摘On the basis of sorting out current understanding of solid bitumen (SB) in shales and taking organic-rich shales in the first member of the Cretaceous Qingshankou Formation in the Songliao Basin as an example, the definition, classification, occurrence and evolution path of SB are systemtically studied, and the indicative significance of SB reflectance (Rob) on maturity and its influence on the development of reservoir space are discussed and summarized. The results show that the difference of primary maceral types is primarily responsible for the different evolution paths of SB. Most of the pre-oil bitumen is in-situ SB with only a small amount being of migrated SB, while most of the post-oil bitumen and pyrobitumen are migrated SB. From the immature to early oil maturity stage, bituminite, vitrinite, and inertinite can be distinguished from SB based on their optical characteristics under reflected light, and alginite can be differentiated from SB by their fluorescence characteristics. Under scanning electron microscope, in-situ SB and migrated SB can be effectively identified. Rob increases linearly with increasing vitrinite reflectance (Ro), as a result of a decrease of aliphatic structure and the enhancement of aromatization of SB. Within the oil window three types of secondary pores may develop in SB, including modified mineral pores, devolatilization cracks and bubble holes. At a high maturity stage spongy pores may develop in pyrobitumen. Scanning electron microscopy combined with in-situ SEM-Raman spectroscopy can further reveal the structral information of different types of SB, thus providing crucial data for understanding for understanding OM migration paths, dynamics, and distances at micro-scale. | LIU Bo WANG Liu FU Xiaofei HUO Qiuli BAI Longhui LYU Jiancai WANG Boyang | 2023 | Petroleum Exploration and Development2023，50，6： | 0 |
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