Study on reservoir parameters and reservoir classification of fractured Hubuzhai gas field

Through core observation analysis of sandstone reservoir of the Shahejie formation of Paleogene in Hubuzhai gas field,the porosity and permeability have been calculated from both microcosmic and macrocosmic aspects.Based on the calculated results,the reservoir classification plan on fractured reservoirs have been put forward and there are three classes andⅥsubclasses in all.In the end,the sandstone reservoir of the Shahejie formation is decided to beⅣsubclass.