Abstract:

The Kezisuhumu Formation in the Upper Sinian is composed of carbonate rock and terrigenous detrital rock deposited in coast envirgnment,which could be subdivided into shoreface,foreshore,algal flat and tital flat subenvironment.Thormbolite-dolomitite in the algal flat and micro-dolomite in the tidal flat underwent dolomitization,dissolution,cementation and neomorphism.The porosity in the thormbolite-dolomitite was speedy de-clined by the cementation,but the reservoir spaces were produced by the dissolution,dolomitization and neomorphism.The analysis results of physical property for the thorm-bolite-dolomitite shows that the rock has good reservoir property.