Discussion of Ordovician carbonate reservoirs in the Hadexun oilfield

Fractured vuggy carbonate reservoirs in Hadexun oilfield have complex geological features and the reservoirs are complex and diverse.In early stage of oilfield development,because the data of drilling density and pressure between wells is missing,the understanding of reservoirs have certain restriction,to determine the types of reservoir as soon as possible and prepare for the development of countermeasures in advance.By using static seismic data,well logging,dynamic data of the production characteristics,the type of energy drive,the pressure recovery curve,there are mainly two reservoir types,namely the constant volume reservoirs and multi fracture cave and connectivity reservoir.The characteristics and characteristics of these two kinds of oil reservoirs are separately analyzed.There are obvious differences between the two types,and therefore different development strategies should be adopted.