Abstract: According to regional geological characteristics of Chang-8 reservoir in Zhangjiawan area,Zhiluo oilfield,through the comprehensive analysis of well logging,mud logging,core and test data,the " Four Properties" relationship study has studied.By using the crossplot method,the oil-water identification chart and the relative minimum standard of logging parameters,such as the resistivity and porosity have been established.The study results indicate when the resistivity is more than 26Ω·m,acoustic time is more than 224us/m,porosity is greater than 7.8%,and therefore the interpreted interval maybe oil layers.