神木气田双三区块山西组沉积相研究

Research on Sedimentary Facies of Shanxi Formation in Shuangsan Block of Shenmu Gas Field

摘要: 本论文以鄂尔多斯盆地神木气田双三区块山西组为研究对象，利用岩心资料、测井资料及前人的研究成果，对研究区进行关于沉积学、岩石学的研究。对鄂尔多斯盆地神木气田双三区块山西组沉积相的类型、特征进行了详细分析，并深入讨论了各个沉积微相。结果表明：研究区山西组物源方向为北北东–南西向，主要发育三角洲平原亚相，发育的微相类型主要有分流河道微相、分流间洼地微相和心滩微相。分流河道微相及心滩微相除了在山23小层几乎不发育外，在其他小层均大量发育，且其主砂体是有利勘探相带。

Abstract: The main research target of this paper is Shanxi formation of Shuangsan block of Shenmu gas field in Ordos Basin .In this paper the author utilized core data, logging data and previous research results to analyze sedimentology and petrology in study area. The types and characteristics of sedimentary facies of Shanxi formation in Shuangsan block of Shenmu gas field in Ordos Basin are analyzed in detail and various sedimentary microfacies are discussed in depth. The results show: the source direction of Shanxi formation is NNE-SW, and the subfacies of delta plain are mainly developed. The microfacies developed mainly include distributary channel microfacies, interdistributary depressional microfacies and Xintan microfacies. Distributary channel microfacies and Xintan microfacies are developed in other substrata except in Shan 23 sublayer, and their main sand bodies are favorable exploration facies zone.