Abstract:
Low permeability reservoirs are classified and evaluated by taking Pucheng oilfield as an example. According to evaluation standards and the main parameters, the reservoirs are divided into 6 types, including ordinary low permeability reservoirs, ultra - low permeability reservoirs, tight reservoirs, very tight reservoirs and fractured - porous reservoirs. It provides scientific basis for further understanding internal structure of oil layers, rationally developing oilfield and enhancing ultimate recovery factor.