佳县—子洲地区山西组沉积相研究  

A STUDY OF THE SEDIMENTARY FACIES OF SHANXI FORMATION IN JIAXIAN-ZIZHOU AREA

作　　者：杨满平[1] 王兴志[1] 李凌[1] 周树勋[2] 于忠平[2] 

机构地区：[1]西南石油学院,四川南充637001 [2]长庆油田勘探开发研究院

出　　处：《西南石油学院学报》2000年第4期14-17,共4页Journal of Southwest Petroleum Institute

基　　金："油气藏地质及开发工程"国家重点实验室基金资助(PLN9903)。

摘　　要：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 。The deposition of Shanxi Formation in Jiaxian-Zizhou area, Ordos basin belongs to a lacustrine deltaic depositional system which evolved from the transitional facies of Carboniferous Taiyuan Formation. The deltaic deposition can be divided into delta plain and delta front subfacies. Microfacies of the delta plain consist of channel, levee, coal-bearing swamp and depression between channels, and crevasse splay. Microfacies of the delta front include subaqueous distributary channel, channel mouth bar, distal bar, subaqueous levee, frontal sheet sand, and interdistributary bay. By studying these microfacies, the evolutional process of the depositional environment and the approximate extension of the sand bodies are envisaged. The results of this work can be used for better exploration targeting and estimation of hydrocarbon reserves in the area.

关 键 词：沉积相 三角洲 砂岩体 鄂尔多斯盆地 

分 类 号：TE121.3[石油与天然气工程—油气勘探] P618.130.2[天文地球—矿床学]