鄂尔多斯盆地上古生界煤系非常规天然气赋存特征

发布时间：2018-04-24 12:25

本文选题：鄂尔多斯盆地 + 非常规天然气　；参考：《煤炭科学技术》2017年04期

【摘要】：基于天然气赋存特征与勘探开发存在密切关系,为了鄂尔多斯盆地非常规天然气高效开发提供理论支持,通过对U-1井上古生界沉积演化史、有机质热演化史、烃源岩条件、储层类型、储层物性条件及含气性综合分析的方法,探讨了U-1井含煤地层非常规天然气的赋存特征。结果表明,研究区上古生界含煤地层主要发育潮坪-三角洲沉积,盆地持续沉降形成气藏,源内、近源成藏组合构建垂向多套天然气成藏。研究区发育页岩-砂岩-页岩、页岩-煤-页岩和页岩-煤-砂岩-页岩三种赋存模式,其中页岩-煤-页岩模式总含气量较高,适合煤层气开采;页岩-煤-砂岩-页岩模式次之,适合煤层气、致密砂岩气和页岩气综合开采;页岩-煤-页岩模式适合致密砂岩气藏开采。
[Abstract]:Based on the close relationship between natural gas occurrence characteristics and exploration and development, in order to provide theoretical support for the efficient development of unconventional natural gas in Ordos Basin, the sedimentary evolution history of Upper Paleozoic, thermal evolution history of organic matter and source rock condition of U-1 well are studied. The occurrence characteristics of unconventional natural gas in coal bearing formation of U-1 well are discussed by means of comprehensive analysis of reservoir types, reservoir physical properties and gas bearing properties. The results show that the upper Paleozoic coal-bearing strata in the study area are mainly developed tidal flat and delta deposits, the basin continues to subsidence to form gas reservoirs, and within the source, the near source reservoir assemblage forms vertical multiple sets of natural gas accumulation. There are three occurrence models of shale sandstone shale shale coal shale and shale coal sandstone shale in the study area. The shale coal shale model has a high gas content and is suitable for coalbed methane mining. Shale coal sandstone shale model is suitable for comprehensive exploitation of coalbed methane tight sandstone gas and shale gas and shale coal shale model is suitable for tight sandstone gas reservoir production.
【作者单位】：中国矿业大学资源与地球科学学院;内蒙古自治区煤田地质局;
【基金】：国家科技重大专项资助项目(2016ZX05041-003)
【分类号】：P618.13

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