Abstract: Due to the double control of rock types and structures on oil reservoirs in Zhangdong area in Huanghua Depression, the pressure of sand formation distributed in different fault-block and that of different sand formation distributed in same a fault-block might be different. At that time, lagging drilling techniques resulted in heavy contaminated oil-layer of several wells and further increased the difficulty for oil-layer evaluation. By means of subdivision of sedimentary facies, determination of oil reservoirs, dividing the little research unit and the model to evaluate oil-layer, much attention has been paid to resolve the analysis of contradictory wells and conducted to fined evaluation for fine oil-layers, has achieved preferable effect. Its way of thinking and method can be valid for the fined reservoir evaluation with the complex geologic condition.