小型断陷盆地辫状河砂体沉积特征——以千家店盆地硅化木公园露头为例  

Sedimentary Characteristics of Braided River in Small Rift Basin

作　　者：季春辉[1] 邓宏文[1] 郭佳[1] 田园圆[1] 王启明 

机构地区：[1]中国地质大学（北京）能源学院,北京100083 [2]中海石油（中国）有限公司天津分公司,天津304500

出　　处：《石油天然气学报》2011年第5期27-31,334,共5页Journal of Oil and Gas Technology

基　　金：国家科技重大专项(2009ZX05009-002)

摘　　要：通过对千家店盆地中的延庆硅化木公园的辫状河砂体露头研究,从岩相成因、岩相组合、沉积构造描述入手分析了辫状河沉积微相类型与沉积特征。辫状河沉积以＂多层楼＂叠置的辫状河道为特征,同时也存在河道间决口或溢岸沉积。分析了辫状河砂体分布的主要控制因素,同时以野外实测数据为基础,运用半定量计算方法得出了辫状河道宽/深经验公式。该项研究为辫状河储层成因类型分析、储层时空分布预测及储层建模提供了依据。The microfacies type and sedimentary feature of the braided river were analyzed through the study of braided river sandbody outcrops in the Qianjiadian Jurassic rift basin in Yanqing silicified wood park of north Beijing,starting from the description of lithofacies genetic composition and sedimentary structures.The results indicate that the braided river depositional system includes the 'multi-floor' stacked braided channels and the crevasse or overbank deposits between the channels.The main controlling factors on the distribution of braided river sandbodies are analyzed,the braided channel width/depth empirical formula are derived by using semi-quantitative method based on measured field data.The study provides a basis for analyzing genetic types of braided river reservoirs,their spatial distribution prediction and reservoir modeling.

关 键 词：辫状河 北京延庆 野外露头 沉积微相 宽深比 

分 类 号：P618.13[天文地球—矿床学]