Application of accuracy logging interpretation in FMN oil field reserve evaluation

In the FMN oil fields of the Northern Jiangsu Basin,small fault blocks are in large quantity.The oil-bearing intervals in production wells are very long and the oil zones are narrow.There are many oil-bearing formations.In the 1st section (E₂s¹) of the Sanduo Formation as well as the 2nd (E₂d²) and the 1st (E₂d¹) sections of the Dainan Formation,oil reserves have been found,and physical properties decrease with obvious vertical variance from E₂s¹,E₂d² to E₂d¹.Oil and water relationship is complicated.The electric properties of oil-bearing series are different.In view of the difficulties of oil,water,and dry layers identification in the FMN oil fields,the relationship between reservoir properties has been studied based on the data of core,logging,well-testing and production.Combined with the physical and electric features of reservoir,the physical and electric identification criteria for oil,water and dry layers has been established.The criteria has been applied in exploration and proved effective.