苏里格气田东区二叠系下石盒子鲤盒8段沉积相分析

Sedimentary Facies Analysis of He8 Member of Lower Shihezi Formation, Permian in Eastern Sulige Gasfield

通过重矿物含量和轻矿物含量分析，认为苏里格气田东区二叠系下石盒子组盒8段发育3个古水系．对应于3个石英含量分区和3个沉积相区：召27井区、召31井区的近南北方向；召23井区、召28井区的西北向；统29井区的东北向分区。在此基础上重点分析了沉积相分布规律，认为下石盒子组盒8段发育辫状河、曲流河及网状河。以河流相沉积为主。

Through heavy mineral and light mineral content analysis, it is considered that the three ancient water systems developed in the He8 Member of Permian Lower Shihezi Formation, Eastern Sulige gasfield, corresponding to the three partitions of quartz con- tent and three sedimentary facies districts. They were respectively called Wells Zhao27, Zhao31 areas near the north-south direetion, Wells Zhao23, Zhao28 areas in northwest orientation, and Well Tong29 area in northeast partition. On this basis, distribution law of the sedimentary facies is mainly analyzed. It is considered that the braided rivers, meandering streams and anastomosing streams（riv- er network）are developed in the Lower Shihezi Formation He8 Member, with river facies remaining dominant.