准噶尔盆地玛湖凹陷风城组泥页岩生物标志化合物特征与赋存状态研究
TE122.113; 准噶尔盆地玛湖凹陷二叠系风城组泥页岩不同层段生物标志化合物特征与赋存状态特征认识较为薄弱,通过采用岩石热解、气相色谱—质谱、荧光薄片和氩离子抛光电镜等实验技术,厘清不同层段烃源岩物质基础、生物标志化合物分布特征及意义、不同赋存状态页岩油,对玛湖凹陷下一步勘探部署具有重要意义.玛湖凹陷风城组泥页岩主要为中等—好烃源岩,有机质类型为Ⅱ型,处于成熟演化阶段;生物标志化合物组成特征表明具有高丰度的Pr和Ph、β-胡萝卜烷及C29重排甾烷,C27-C28-C29规则甾烷呈反"L"型分布,指示有机质以藻类等低等水生生物贡献为主;较低的Pr/Ph比值以及较高的伽马蜡...
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| Published in | 石油实验地质 Vol. 46; no. 5; pp. 954 - 1001 |
|---|---|
| Main Authors | , , , , , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
怀柔实验室新疆研究院,乌鲁木齐 830000%中国石化 石油勘探开发研究院 无锡石油地质研究所,江苏 无锡 214126%中国石油 新疆油田分公司 勘探开发研究院,新疆 克拉玛依 834000
01.09.2024
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1001-6112 |
| DOI | 10.11781/sysydz202405954 |
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| Abstract | TE122.113; 准噶尔盆地玛湖凹陷二叠系风城组泥页岩不同层段生物标志化合物特征与赋存状态特征认识较为薄弱,通过采用岩石热解、气相色谱—质谱、荧光薄片和氩离子抛光电镜等实验技术,厘清不同层段烃源岩物质基础、生物标志化合物分布特征及意义、不同赋存状态页岩油,对玛湖凹陷下一步勘探部署具有重要意义.玛湖凹陷风城组泥页岩主要为中等—好烃源岩,有机质类型为Ⅱ型,处于成熟演化阶段;生物标志化合物组成特征表明具有高丰度的Pr和Ph、β-胡萝卜烷及C29重排甾烷,C27-C28-C29规则甾烷呈反"L"型分布,指示有机质以藻类等低等水生生物贡献为主;较低的Pr/Ph比值以及较高的伽马蜡烷指数,反映出沉积环境主要为咸化的还原环境;C31αβ22S/(22S+22R)、C29 M/C29 H和C29ββ/(ββ+αα)等藿烷类和甾烷类成熟度参数表明烃源岩处于成熟阶段.另外,风城组二段泥页岩相对于风一段、风三段具有更大的生烃潜力,具备更好的烃源岩物质基础,同时C20/C23 TT、C21/C23 TT、Ga/C30 H等生物标志化合物相关参数指示风二段藻类等贡献较多,更偏还原和咸化的环境;结合风二段以游离赋存状态为主,认为烃类赋存于粒间孔和粒内孔中.风二段有利于页岩油富集与保存,展现出更好的页岩油勘探开发前景. |
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| AbstractList | TE122.113; 准噶尔盆地玛湖凹陷二叠系风城组泥页岩不同层段生物标志化合物特征与赋存状态特征认识较为薄弱,通过采用岩石热解、气相色谱—质谱、荧光薄片和氩离子抛光电镜等实验技术,厘清不同层段烃源岩物质基础、生物标志化合物分布特征及意义、不同赋存状态页岩油,对玛湖凹陷下一步勘探部署具有重要意义.玛湖凹陷风城组泥页岩主要为中等—好烃源岩,有机质类型为Ⅱ型,处于成熟演化阶段;生物标志化合物组成特征表明具有高丰度的Pr和Ph、β-胡萝卜烷及C29重排甾烷,C27-C28-C29规则甾烷呈反"L"型分布,指示有机质以藻类等低等水生生物贡献为主;较低的Pr/Ph比值以及较高的伽马蜡烷指数,反映出沉积环境主要为咸化的还原环境;C31αβ22S/(22S+22R)、C29 M/C29 H和C29ββ/(ββ+αα)等藿烷类和甾烷类成熟度参数表明烃源岩处于成熟阶段.另外,风城组二段泥页岩相对于风一段、风三段具有更大的生烃潜力,具备更好的烃源岩物质基础,同时C20/C23 TT、C21/C23 TT、Ga/C30 H等生物标志化合物相关参数指示风二段藻类等贡献较多,更偏还原和咸化的环境;结合风二段以游离赋存状态为主,认为烃类赋存于粒间孔和粒内孔中.风二段有利于页岩油富集与保存,展现出更好的页岩油勘探开发前景. |
| Abstract_FL | The characteristics of biomarker compounds and their occurrence states in different layers of the Permian Fengcheng Formation shale in Mahu Sag,Junggar Basin are poorly understood.By using experimental techniques such as rock pyrolysis,gas chromatography-mass spectrometry,fluorescence thin sections,and argon ion polishing electron microscopy,the material basis of hydrocarbon source rocks in different intervals,the distribution charac-teristics and significance of biomarker compounds,and different occurrence states of shale oil are clarified.This is of great significance for the next step in exploration and deployment in the Mahu Sag.The shale of the Fengcheng Formation in the Mahu Sag is mainly medium to good hydrocarbon source rocks,with type Ⅱ organic matter and in a mature evolutionary stage.The composition characteristics of biomarker compounds show high abundance of Pr and Ph,β-carotane,and C29 rearranged steranes.The C27-C28-C29 regular steranes exhibit an inverted"L"distribution,indicating that the organic matter is mainly contributed by lower aquatic organisms such as algae.Lower Pr/Ph ratios and higher gammacerane indices reflect a saline reducing sedimentary environ-ment.Maturity parameters such as C31αβ22S/(22S+22R),C29 M/C29 H,and C29ββ/(ββ+αα)for hopanes and steranes indicate that the hydrocarbon source rocks are in the mature stage.In addition,the shale of the second member of the Fengcheng Formation has greater hydrocarbon generation potential and better source rock material basis than that in the first and third members.Meanwhile,biomarker compound parameters such as C20/C23 TT,C21/C23 TT,and Ga/C30H indicate that the second member has more contributions from algae and other organisms,and a more reducing and saline environment.The hydrocarbons in the second member are mainly in a free occur-rence state,residing in intergranular and intragranular pores.The study shows that the second member of the Fengcheng Formation is more favorable for shale oil enrichment and preservation,showing a better prospect for shale oil exploration and development. |
| Author | 支东明 谢安 朱涛 邹阳 李志明 冷筠滢 唐勇 何晋译 何文军 |
| AuthorAffiliation | 怀柔实验室新疆研究院,乌鲁木齐 830000%中国石化 石油勘探开发研究院 无锡石油地质研究所,江苏 无锡 214126%中国石油 新疆油田分公司 勘探开发研究院,新疆 克拉玛依 834000 |
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| Author_FL | ZHI Dongming LENG Junying ZHU Tao TANG Yong XIE An HE Wenjun LI Zhiming HE Jinyi ZOU Yang |
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| DOI | 10.11781/sysydz202405954 |
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| Keywords | Junggar Basin 生物标志化合物 页岩油 free hydrocarbon Permian 准噶尔盆地 shale oil 游离烃 风城组 玛湖凹陷 泥页岩 Mahu Sag 二叠系 Fengcheng Formation biomarker compound |
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| PublicationTitle | 石油实验地质 |
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| Publisher | 怀柔实验室新疆研究院,乌鲁木齐 830000%中国石化 石油勘探开发研究院 无锡石油地质研究所,江苏 无锡 214126%中国石油 新疆油田分公司 勘探开发研究院,新疆 克拉玛依 834000 |
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