Zhao Yuan South Area Chang47 Well Block Oil And Water Zone Distribution Rules And Major Controlling Factor Study

Based on the 3D Pre-stack migration seismic data covered Chang 47 well block,combining with horizontal slice, coherence data, attribute data and multiple color display technical to do the research work on detailed structural interpretation, reservoir prediction.Considering seismic profile and fracture distribution characteristic, analyze fault development characteristic and phases. Combining with well drilling results study on fault controlling action on oil accumulation in Fuyu formation.In the seismic profile, fault mainly composited as flower structure, and graben accompanied with horst.In the study area, fault development can be divided into three phases:Early faults developed in Early Cretaceous Epoch, middle faults developed in later Quantou Group and early Qingshankou Group, later faults developed in NenJiang Group and upper group. Massive middle faults developed in Fuyou oil reservoir and lack of Early faults and Later faults.In Fuyu oil reservoir, oil and gas mainly migrated from Sanzhao Depression. Faults and fluvial sandstone played as the oil migration passway. Based on the faults development and reservoir distribution characteristic, using well logging data, testing data to study on oil and water zone distribution rules and reservoir type. The major reservoir type is fault – lithology reservoir controlling by fault barrier in high location and sandstone distribution.