Hydrocarbon Phase Behaviors and Reservoir Types in Yanqi Basin

Combining with severial experience stutistical methods,the hyd1ocarbon reservoir types in Yanqi basin arecomprehensively discriminated on the basis of PVTphase behaviour analysis of 7 hydrocarbon samples pickedfrom 5 zones in Well Yanchan l,We1l Bao l and WellYan 2.The IV Zone in Baozhong block in Baolang oilfieldis either a condensate gas reservoir with oil rings or an oilreservoir with a condensate gas cap, whi1e Baobei blockand Yan 2 block in Benbutu oi1field are 1ight b1ack oilreservoirs with rich intermediate hydrotarbons.These studyresultS point out the direction for further exp1oring oilring reserves and provide an important basis fordevelopment planning.