摘要
在分析三叠系岩心、录井、测井资料的基础上,将三叠系划分为8个三级层序,并识别出辫状河、湖泊及辫状河三角洲3种沉积相类型.高位体系域以辫状三角洲细砂岩为主,湖侵体系域以湖相泥岩为主,低位体系域发育粗粒的陆上河流沉积.储层主要发育在各三级层序的低位体系域,即粗粒的陆上河流沉积体系.三叠系最有利的沉积相带分布在盐边和盐上地区,因此,盐边和盐上的岩性、构造叠置区是三叠系最有利的油气勘探地区.
The Triassic is a very important clastic rock stratum to the increase of the oil production of Tahe Oilfield.Based on the analyses of core and logging data,the Triassic is divided into 8 third-order sequences,and 3 types of sedimentary facies are recognized,which are braided river,lake and braided river delta.The highstand system tract is mainly braided-river delta fine sandstone,the transgressive system tract is mainly lake-facies mudstone,and the lowstand system tract is mainly coarse continental fluvial deposition.The favorable oil and gas exploration zone is in the lowstand system tract of third-grade sequences.
出处
《西安石油大学学报（自然科学版）》
CAS
2008年第5期11-14,共4页
Journal of Xi’an Shiyou University（Natural Science Edition）
关键词
塔河油田
三叠系
层序地层
沉积相
Tahe Oilfield
Triassic
sequence stratigraphy
sedimentary facies
