Research On The Oil And Gas Distribution Features And Reservoir Characteristics Of Oil-bearing In Chang-4+5,chang-6Member Of Yao-281Block In Yao-dian Oil Field

Chang-4+5,Chang-6member of Yao-281block in Yao-Dian oil field is taken as thestudy object in this thesis.Under the guidance of theories of petroleum geology,sequencestratigraphy，reservoir geology，sedimentology and well logging geophysics，using manytesting methods and analytical techniques, Chang4+5，Chang-6member of Yao-281block inYao-Dian Oil Field is deeply studied in strata、structure、sediment and characteristic ofreservoir and oil storage. Based on these methods, the geological reserve and recoverablereserve are calculated and evaluated comprehensively in this study area. The mainunderstanding and conclusions are as follows:（1）Chang-4+5,Chang-6member of Yao-281block in Yao-Dian oil field appears as agently monocline，Develop a low-range nosing structure in the Monocline background，Chang-62,Chang63is the main force oil reservoir in this block，Chang61，Chang4+5oilreservoir are limited.（2）The lithology of reservoir in Chang-4+5,Chang-6member of Yao-281block aregranule and fine arkosic sandstone.dissolved pores between grains is the mine poretypes.Authigenic clay minerals,carbonate minerals,Authigenic quartz and feldspar are themain agglutinate.It is low in reservoir heterogeneity.（3）Chang-4+5,Chang-6member of Yao-281block blong to distributary channelsediment.Channel sandstone deposition is the main Sedimentary micro facies. Chang-4+5,Chang-6in this block are controlled by lithology and nosing structure，Elastic-dissolvedgas drive reservoir is the main drive type.Reservoir configuration always like a opticallens.Chang62、Chang63oil reservoir had a wide range of distribution，Chang61、Chang4+5arelimited.