准噶尔盆地北缘山前带湿地扇沉积特征及控藏作用

发布时间：2019-01-07 15:49

【摘要】：综合野外露头、岩心、钻测井以及分析测试资料等,对准噶尔盆地北缘哈拉阿拉特山山前带侏罗系八道湾组开展了系统的沉积相研究。结果表明:八道湾组一段沉积时期,受构造背景、古物源、古气候的综合影响,哈山南缘山前带发育一套典型的湿地扇沉积,可识别出扇根、扇中、扇缘三种亚相,扇中可进一步分为辫状水道和泥炭沼泽两类微相;在明确了相类型及其展布特征的基础上,建立研究区湿地扇沉积相模式,其在岩性特征、沉积序列、平面规模、微相组合等方面均与洪积扇有明显区别;山前带湿地扇沉积区具有良好的勘探潜力,有利的微相、岩石相以及原始沉积组构共同控制着油藏分布,其中扇中辫状水道砂砾岩相和粗砂岩相为原油富集的有利储集相带。
[Abstract]:Based on field outcrop, core, well logging and analysis and test data, the sedimentary facies of the Jurassic Badaowan formation in the front belt of the Hara Arrate Mountain in the northern margin of Junggar Basin have been studied systematically. The results show that during the sedimentary period of the first member of Badaowan formation, due to the comprehensive influence of tectonic background, antiquities and paleoclimate, a set of typical wetland fan deposits were developed in the front belt of the southern margin of the Hashan Mountains, which can identify three subfacies of the fan root, the middle fan and the fan margin. The fan can be further divided into two types of microfacies: braided waterway and peat swamp. The sedimentary facies model of wetland fan in the study area is established on the basis of defining the facies types and distribution characteristics. The sedimentary facies model of wetland fan in the study area is obviously different from that of alluvial fan in lithologic characteristics, sedimentary sequence, plane scale, microfacies combination and so on. The reservoir distribution is controlled by favorable microfacies, lithofacies and original sedimentary fabric in the wetland fan sedimentary area of the front mountain zone, in which the braided channel sandstone facies and coarse sand facies are favorable reservoir facies for oil enrichment.
【作者单位】：中国石油大学地球科学与技术学院;胜利油田新疆勘探项目管理部;中国石油新疆油田分公司实验检测研究院;
【基金】：教育部博士点基金项目(20120133120013) 国家科技重大专项(2011ZX05009)
【分类号】：P618.13

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