准噶尔盆地新春地区新近系油气富集规律

发布时间：2018-01-28 20:15

  本文关键词： 成藏规律 输导体系 沙湾组 准噶尔盆地　出处：《岩性油气藏》2017年04期 　论文类型：期刊论文

【摘要】：由于对准噶尔盆地新春地区新近系沙湾组油气藏的成藏条件及成藏规律认识不清,导致多口探井连续失利。通过对区域构造、油源对比、输导体系及成藏特征等的综合分析表明:成藏有利条件包括构造演化、烃源岩、储层、盖层和圈闭等,油气生成于四棵树凹陷侏罗系,自南向北运移,富集于沙湾组中下部;沙一段Ⅰ砂组发育厚砂层,单层厚度大,对油气的运聚起到了高效输导的作用,沙一段Ⅱ砂组和沙二段均以砂泥岩互层为主,在喜山期小断层的纵向沟通作用下,在沙二段薄砂岩储层中最终成藏;侏罗系和新近系2套毯砂为车排子凸起区油气远距离运移提供了横向输导条件,不整合面与上倾尖灭砂体的耦合关系控制着沙一段Ⅰ砂组油气的富集,喜山期形成的小断层与砂体耦合关系控制着沙一段Ⅱ砂组和沙二段的油气成藏。
[Abstract]:Due to the unclear understanding of the reservoir forming conditions and the reservoir forming rules of the Neogene Shawan formation in the Xinchun area of Junggar Basin, many exploration wells continue to fail. Through the regional structure, oil source correlation. The comprehensive analysis of transportation system and reservoir forming characteristics shows that the favorable conditions of reservoir formation include structural evolution, hydrocarbon source rock, reservoir, cap rock and trap, etc. Oil and gas are generated in Jurassic system of Sikosu sag and migrated from south to north. Enriched in the middle and lower part of Shawan formation; The thick sand layer is developed in the sand formation 鈪，

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