Abstract: Using the data of logging, testing of the 6 new exploratory wells drilled in the fang No.1 fault block of the P oil field, this paper checks a series of reservoir parameters estimation data which was completed in project of pre-reservoir description. The following conclusion are obtained:1.Regression analysis should use the logging of local fault block as much as possible. 2.The change of reservoir area and effective thickness has significant impact on the volume of reservoir.