Estimation Method of Natural Water Bodies in the Fracture Cavity Carbonate Reservoir of the Sea

Abstract

In recent years, the discovery of fractured carbonate reservoirs has made it become a hot spot for the development of such reservoirs. The oil field of south of Bohai is a typical fracture cavity reservoir, which is different from the land oil field. In this oil field, fluid reservoir space is mainly composed of fractures, but caves are not developed, at the same time the reservoir has strong heterogeneity. Oil water relationship and reservoir type are extremely complex and the percolation law is essentially different from the general marine sandstone reservoir. In view of the actual situation of the oil field, the volume of natural water body was studied by reservoir engineering method. By comparative analysis, the results obtained by reservoir engineering method are in agreement with the numerical simulation method. However, reservoir engineering method is simple and rapid, which has a certain reference value for the rapid assessment of water bodies in the same type of oil reservoir at sea.