Migration Pathways of Fuyu Oil Layer in Chang 10 Block in Songliao Basin and Its Control on Oil Accumulation

Key words: 
• Chang 10 block

Abstract: Through oil reservoir anatomization and analyzing its spatialtemporal relationship with reservoir forming condition, migration pathways and the control on oil accumulation and distribution were studied on the basis of summarizing oil migration mechanism and mode in Fuyu oil layer in Chang 10 block. It was considered that oil migration pathways of Fuyu oil layer in Chang 10 block were as follows in main. ①T2 source faults are transporting pathways through which oil that generated by K1qn1 source rock migrated downward into underlying F, Y oil layers in Sanzhao depression. ②Faults combining with sand bodies are transporting pathways of oil in Fuyu oil layer in Sanzhao depression migrating laterally to Chang 10 block. The controlling roles of oil migration pathways of Fuyu oil layer in Chang 10 block to oil accumulation and distribution are mainly manifested as: ①Development degree of T2 source faults controls oil supply amount of Fuyu oil layer in Chang 10 block. ②Fault concentrated belts are main oil accumulation areas of Fuyu oil layer in Chang 10 block, and high fault block connected by transporting pathways that formed by faults combing with sand bodies are main oil accumulation positions.