Research on main controlling factors of oil and gas accumulation in Chang 8 member in Fuxian area,Ordos Basin
In recent years,industrial oil flow wells have been found in Chang 8 member of Yanchang formation in Fuxian area.However,uneven horizontal distribution is characterized by spot oil bearing.Exploration and development generally show that this area is character-ized by multilayer oil bearing and local layer enrichment.However,the main controlling fac-tors and enrichment rules of oil and water distribution are still unclear,which restricts the exploration and development of combined oil and gas in this area.Based on drilling and production data,the reservoir types,main controlling factors and reservoir-forming modes of Chang 8 reservoir group in the study area are analyzed.The research shows that the reservoir types of Chang 8 member are mainly updip pinch-out lithologic reservoir,lenticular litholog-ic reservoir and tight layer occlusion lithologic reservoir.Hydrocarbon accumulation is con-trolled by source rock,reservoir physical property,sand body thickness and local structure.The reservoir formation pattern of Chang 8 member is typical sandwich type,which is con-ducive to the formation of tight oil.
Chang 8 memberFuxian areamain controlling factors of reservoir formation
NETL
NSTL
万方数据
维普
