Analysis on characteristics and controlling factors of poroperm characteristics of chang 6 reservoirs in wangyao area of Ansai oilfield

To make the analysis on characteristics and controlling factors of poroperm characteristics of Chang 6 reservoirs in Wangyao area of Ansai oilfield,Ordos Basin.Characteristics of reservoirs are comprehensively analyzed so as to make out the controlling factors of poroperm characteristics,which should be based on the analysis of the abundant thin section, mercury penetration and SEM data in the study area.The reservoirs in the study area are characterized by medium porosity and low permeability,low compositional maturity and high textural maturity.The relationship between porosity and permeability is bad and reservoir characteristics are complex. The major factors affecting poroperm characteristics are the sedimentary facies zones,detritus and its filling com- ponents as well as after - corrosion,the fracture development has obvious effect in some areas.