The hydrocarbon discoveries are increasing in deltaic systems in Jurassic Sangonghe Formation in southern Mahu Slope of Junggar Basin in recent years. However, different scales of sedimentological heterogeneities influence reservoir quality and architecture. Consequently, the study aims to employ thin sections, core logs and wireline logs to conduct research to address the issues. The results show that the integrated analysis of conventional cores reveals three facies groups in Sangonghe Formation which are deposited in braided deltaic and lacustrine environment. Each facies group contains several lithofacies given their grain size, sedimentary structures. In addition, the lithofacies types, associations, and wireline responses indicates that Lower, Middle, and Upper Sangonghe Formation is deposited in braided delta plain, braided delta front, and pro‐delta respectively. Moreover, the Sangonghe Formation is characterized by variations regarding sandbody, thickness, geometry, and architecture. The facies distribution and sedimentary environment indicate that accommodation space plays essential controls. The sedimentological heterogeneity controls reservoir quality and architecture from macro‐ to micro‐scale. The macro‐scale insights reflect that the lower and middle Sangonghe Formation shows high connectivity of sandbodies while the upper Sangonghe Formation shows low connectivity of sandbodies. The micro‐scale insights indicate that sandstone types, texture, composition all plays significantly role in controlling reservoir porosity and permeability. Finally, the understandings and insights of reservoir sedimentological heterogeneities assist in better prediction and assessment of reservoir quality and architecture. Finally, it will make contributions to reservoir development, recovery, and productivity for areas with similar sedimentological settings.

中文翻译：

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西北地区准Jung尔盆地南马胡斜坡侏罗系三工河组沉积储层特征

近年来，准gar尔盆地南马胡斜坡侏罗系三工河组三角洲系油气发现增加。然而，不同尺度的沉积学非均质性影响储层质量和构造。因此，该研究旨在利用薄截面，岩心测井和电缆测井进行研究以解决这些问题。结果表明，对常规岩心的综合分析揭示出三公河组的三个相群分别沉积在辫状三角洲和湖相环境中。给定它们的粒度，沉积结构，每个相组包含几个岩相。此外，岩相类型，联系和缆线响应表明，下，中和上三工河组沉积在辫状三角洲平原，辫状三角洲前缘，和pro-delta。此外，三工河组的特征是砂体，厚度，几何形状和构造等方面的变化。相分布和沉积环境表明，住宿空间起着至关重要的控制作用。沉积学非均质性从宏观到微观都控制着储层的质量和构造。宏观上的洞察力反映出，三工河组的中下段显示出较高的砂体连通性，而三工河组的上层显示出较低的砂体连通性。微观洞察力表明，砂岩的类型，质地，组成都在控制储层孔隙度和渗透率中起着重要作用。最后，储层沉积非均质性的理解和见解有助于更好地预测和评估储层质量和构造。最后，它将为具有相似沉积学背景的地区的储层开发，采收率和生产率做出贡献。