Study on Chang 6 formation sedimentary micro facies in Jingan oilfield Panguliang western block

Based on core and well logging data,this paper made comprehensive study on the characteristics on lithology,sedimentary tectonic,particle size distribution and logging facies and made a conclusion that the block is mainly delta front sub-facies.The main sedimentary subfacies are underwa-ter distribution channel,mouth bar,subsea natural barrier,under water interdistributary and subaqueous crevasse splay.The paper analyzed Chang 6 formation with regional sedi-mentary data,sand body distribution,core subfacies profile and logging profile,received the space and time distribution rule and change rule of sedimentary subfacies,and mean-while discussed the relationship between sedimentary facies and hydrocarbon reservoir.The result showed that the reservoir physical property and oiliness are controlled by sedi-mentary subfacies,underwater distribution channel and mouth bar are main preferable formation,which provided technological support for the further high efficient explora-tion.