吉木萨尔凹陷芦草沟组致密油系统的成藏特殊性

发布时间：2018-05-24 20:07

本文选题：吉木萨尔凹陷 + 芦草沟组　；参考：《沉积学报》2017年04期

【摘要】：通过烃源岩条件、储层特征与原油类型分布及其来源、源—储配置关系的系统分析,分析了准噶尔盆地吉木萨尔凹陷芦草沟组上、下段致密油系统的自生自储与层控成藏特征。结果表明,芦草沟组咸水湖相沉积中的不同岩性均有不同含量的原始有机质,其中的泥岩有机质丰度和生烃潜力最高,为主力烃源岩,母质类型具倾油特征,处于生油阶段。位于烃源岩层系内的砂岩类与碳酸盐岩类储集层主要为低孔低渗—致密背景,含油性与物性差异存在密切关系。源—储配置表现为互层和泥包砂特征,具有源、储邻近叠置分布的致密油聚集条件。芦草沟组上、下段的原油物性与地化特征存在明显差异,分别主要来自邻近层段烃源岩。综合研究认为吉木萨尔凹陷内芦草沟组具有就近运移、自生自储的层控致密油成藏模式。
[Abstract]:Based on the systematic analysis of source rock conditions, reservoir characteristics, distribution of crude oil types and source, source-reservoir allocation relationship, the characteristics of autogenic self-reservoir and strata-controlled reservoir formation in the upper and lower Lucaogou formation in Jimusar depression, Junggar Basin are analyzed. The results show that different lithology of Lucaogou formation has different contents of original organic matter, in which mudstone organic matter abundance and hydrocarbon generation potential are the highest, which is the main source rock, and the parent material type has the characteristics of tilting oil and is at the stage of oil generation. The sandstone and carbonate reservoirs in the source rock series are mainly low porosity, low permeability and dense background, and the oil-bearing property is closely related to the difference of physical properties. The source-reservoir configuration is characterized by interbedded and mud-packed sand with tight oil accumulation conditions with source and adjacent superposition distribution. The crude oil physical properties and geochemical characteristics of the upper and lower member of the Lucaogou formation are obviously different, mainly from the source rocks of the adjacent strata. It is considered that the Lucaogou formation in Jimusar sag has a stratified tight oil accumulation model of near migration and self-generation and self-storage.
【作者单位】：中国石油大学(北京)油气资源与探测国家重点实验室;新疆油田分公司实验检测研究院;新疆油田分公司勘探开发研究院;
【基金】：国家自然科学基金项目(41372142) 国家科技重大专项项目(2017ZX05008006-003)~~
【分类号】：P618.13

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