子洲气田中二叠世山2^3期沉积相再认识  

Recognition of sedimentary facies of the third submember of the second member of Middle Permian Shanxi Formation(Shan2-3) in Zizhou Gasfield

作　　者：安文宏[1,2] 杨文敬[3] 石小虎[1,2] 杨勇[1,2] 冯永玖[1,2] 

机构地区：[1]中国石油长庆油田分公司勘探开发研究院,陕西西安710021 [2]低渗透油气田勘探开发国家工程实验室,陕西西安710021 [3]长庆油田公司勘探部,陕西西安710021

出　　处：《西安石油大学学报（自然科学版）》2014年第3期20-26,7,共7页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家示范工程项目"鄂尔多斯盆地大型低渗透岩性地层油气藏开发示范工程"(编号:2011ZX05044)

摘　　要：经过地球化学、生物化石和沉积构造方面的研究论证,确定子洲气田山23段三角洲类型为近海湖泊辫状河三角洲,纠正了以往的沉积相认识误区。根据自生矿物、层理构造、岩石颜色等沉积环境标志性产物首次划分出了中二叠世山23期湖岸线位置,对研究区沉积微相的详细研究认为子洲地区山23段发育近海湖泊辫状河三角洲平原沉积亚相,清涧地区发育三角洲前缘沉积亚相。同时,在沉积相重新认识基础上分析了沉积相对储层储集性能和气水分布的控制作用,对子洲气田滚动扩边开发具有重要的理论指导意义。According to the studies of rock geochemistry,biological fossils and sedimentary structures,it is determined that the Shan 2-3 delta in Zizhou Gasfield is a paralic lake braided river delta,which corrects the past wrong understanding of the sedimentary facies in the region. And the lake shoreline position of the Middle Permian Shan 2-3 submember is determined for the first time according to the sedimentary environment marks of authigenic minerals,bedding structure and rock color. According to the detailed study on the sedimentary microfacies,it is held that the paralic lake braided river delta plain subfacies is developed in Shan 2-3 submember of Zizhou area,and the paralic lake braided river delta front subfacies is developed in Shan 2-3 submember of Qingjian area. The control effect of the sedimentary facies on the reservoir performance and the gas /water distribution is analyzed on the basis of the recognition of the sedimentary facies,which is of important guidance to the further development of Zizhou Gasfield.

关 键 词：子洲气田 山2^3段 沉积相 湖岸线 

分 类 号：TE121[石油与天然气工程—油气勘探]