In order to better guide the exploration and development of gas field,this article used core samples,well logging,drilling wells and test material,through analysis on sandstone content,sandstone clastic components,heavy minerals and its combination,ZTR index stability coefficient was understood.The result showed that the heavy mineral assemblage types of the Permian He 8 are divided into leucoxene + zircon + magnetite,zircon + tourmaline + pyrrhotite zircon,leucoxene + zircon + pyrrhotite zircon,and it can be divided into two regions.It was realized that the southern Yanchang gas field is an intersections area of north provenance and southern provenance in the period of the Permian He 8.The north is controlled by the northeast and Northwest provenance.There is only one source system in the south.The southern provenance is main material supply in the southern gas field,scope is big and covers most of the region.Northern provenance system influence scope is small,and that is mainly distributed in the north of the Fuxian-Yichuan areas.%为了更好地指导气田的勘探开发,利用钻井、测井、岩心和化验等资料,对砂岩含量、砂岩碎屑组分、重矿物组合、ZTR指数、稳定系数等物源特征进行了综合分析,确定了延长气田南部石盒子组盒8段的物源方向及影响范围.研究表明:气田南部石盒子组盒8段的重矿物组合类型包括白钛石+锆石+磁铁矿、锆石+电气石+磁黄铁矿锆石和白钛矿+锆石+磁黄铁矿3种,可分为南部和北部2个重矿物组合分区;石盒子组盒8沉积期分为富县一宜川以北的北部物源区和富县一宜川以南的南部物源区,其中北部物源区又分为东、西向2个物源体系,南部只有1个物源体系;南部是气田主要物质供给区,影响范围覆盖了富县一宜川以南的整个地区,北部物源体系影响范围较小,主要分布在富县一宜川以北的部分地区.
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