Study on reservoir heterogeneity of upper 2+3 of Sha-Ⅱ in eastern area of Pucheng oilfield

Based on the analysis of rock properties in upper 2+ 3 of Sha-Ⅱin the East Pucheng oilfield,the reservoir heterogeneity such as interlayer heterogeneity,in-layer heterogeneity,plane heterogeneity and micro heterogenei- ty have been studied.The research believes that the heter- ogeneity in interlayer is weak,while the heterogeneity, interbedded density and frequency inside and outside lay- ers are strong so that the reservoir development and wa- terflooding direction are controlled and the permeability changes quickly with nonhomogeneous distribution on the plane.These characteristics lay a good foundation for de- velopment adjustment plans of reservoirs,and at the same time the analytical method can be popularized into similar type reservoirs.