Provenance analysis and its geological significance of Shan_1 session and He_8 session in northern Sulig gas field,Ordos basin,China

Along with the discovery of clastic rock gas reservoir in Shan1 session and He8 session in the northern part of Sulig gas field,provenance issues have attracted common attention.Systematic research has been conducted with the application of mathematical statis-tics methods,combined with composition features,heavy minerals distribution features,clastic types and quartz grain.These results indicate that during the deposition of Shan1 and He8 session,the clastic sediments were from northern and northeastern basin,and the provenance can be traced from Alanshan-Yinshan ancient continent.The provenance and sediment system distribution pattern of the northern area of Sulig gas field are closely linked to physical properties of reservoir sandbody.