Layered Mechanism And Capacity Of The Underground Water Reservoir Exploitation Comprehensive Study And Application

Lu 9 area in Luliang Oilfield is one of the greatest discovery of CNPC in 2000. Its main oil-bearing series are Cretaceous Hutubihe formation and middle Jurassic Xishanyao formation.As a while, Lu 9 area is layered bottomwater reservoir. As for Hutubihe reservoir:the range of its structure is low;the oil layer thickness is thin, the difference of the bottomwater thickness is great;the production profile of the same series is made of many bottomwater oil zones, or bottomwater oil zones and oil zones;each oil layer is relatively islated layered sand body. Aiming to its geologic characteristics, this paper systematically researches the production mechanism of the bottomwater oil zone;by establishing the fine geologic model, the paper does some simulations of the production mechanism about the development of the bottomwater oil zone in Lu9 area, and shows the production feature of the reservoir; and aiming to Hutubihe reservoir, establishing the well model of anti-nine-spot pattern to open out the production feature and illustrate the early productivity. By analysing the different methods of determining productivity, determining the early productivity of the diverse reservoirs. Finally, puttig forward the corresponding development combination principia of the diverse types bottomwater oil zone and the reasonable employing sequence:at first employing the oil zone that the oil thickness percent is high; the oil zone can be employed at the same time, which the oil thickness percent is similar.The paper determines the early productivity and corresponding development countermeasures of Hutubihe reservoir, the conclusions get good results. The method and strategy can be used to other similar oilfields.