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鄂尔多斯盆地佳县—子洲地区山西期沉积是由石炭纪太原期的海陆过渡相转变而成的陆相湖成三角洲沉积体系 ,主要由三角洲平原和三角洲前缘构成。三角洲平原亚相包括河道 (包括主河道和分流河道 )、天然堤、河道间含煤沼泽、河道间洼地、决口扇等 ;三角洲前缘亚相包括水下分流河道、河口坝、远砂坝、水下天然堤、三角洲前缘席状砂、分流间湾等组成。通过对这些沉积微相的研究 ,确定研究区的沉积环境的演化过程 ,沉积砂体的大致展布及对储层的控制 ,对未来的油气勘探部署及储量计算有重要意义
The Ordos Basin Jiaxian - Zizhou area Shanxi period deposition is a terrestrial lacustrine delta depositional system formed by the transitional phase of the sea-land transitional period from the Carboniferous Taiyuan period, and is mainly composed of the delta plain and the delta front. The deltaic delta subfacies include rivers (including the main and diversion channels), natural dykes, interbedded coal bogs, inter-fluvial depressions, rift fans, etc. The delta front subfacies include underwater distributary channels, estuarine dams, Underwater natural dike, the delta front sand, diversion bay and other components. Through the study of these sedimentary microfacies, the evolution of sedimentary environment, the general distribution of sedimentary sand bodies and the control of reservoirs in the study area are of great significance to future oil and gas exploration and deployment and reserves calculation