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从显微煤岩学角度探讨了贵州六盘水地区晚二叠世龙潭煤系煤的生烃状况。研究表明,树皮体和基质镜质体是研究区煤岩显微组成中主要的两种富氢组分,“富镜质体较富树皮体”是主采煤层典型的煤岩组合特征,在成烃演化过程中,富氢镜质体和树皮体对生烃作出了主要贡献。渗出沥青体充填于镜质体微裂隙或细小孔洞以及丝质体胞腔中。这些微裂隙和胞腔对煤成油的保存、富集和运移起到关键作用。显微组分间的这种配置关系为煤成油藏的形成提供了非常有利的条件。六盘水地区具有形成煤成油藏的母质条件,同时在煤层中具有较好的保存富集以及运移条件,如果存在有利的地质背景与之相配合,研究区煤成油藏的勘探开发工作将具有十分乐观的前景。
From the perspective of micro-coal and petrology, the hydrocarbon generation status of Late Permian Longtan coal-bearing coal in Liupanshui area of Guizhou Province was discussed. The results show that the bark body and matrix vitrinite are the two main hydrogen-rich components in the coal and rock micro-composition in the study area. The “richer vitrinite-rich bark body” is the typical coal-rock combination in the main coal seam In the hydrocarbon evolution process, the hydrogen-rich vitrinite and bark body make the main contribution to hydrocarbon generation. Exudation bitumen filled in the vitrinite micro-fissures or small holes and the filamentous cell cavity. These microcracks and cell cavities play a key role in preserving, enriching and transporting coal into oil. This arrangement of microscopic components provides a very favorable condition for the formation of coal-formed reservoirs. The Liupanshui area has the parent material conditions for forming coal-formed reservoirs, and has good conditions for preserving and enriching and migrating in coal seams. If favorable geological conditions exist, the exploration and development of coal-derived reservoirs in the study area will Has a very optimistic outlook.