Based On The Architecture Theory, The Control Mechanism Of The Point Dam Intercalation Of Meandering River On The Bottom Water Drive

Because of the abundant reserves of bottom water reservoir,it plays an important role in Chinese petroleum industry.More and more discovery andexploitation of the bottom water reservoirs,the development law of this reservoir has also has been recognized.During the process of development and production ofthe reservoirs,with the crude oil being produced,the pressure in the wellbore is reduced,which makes the bottom water always tends to form a water cone under the bottom of the well bore,and it leads the poorly effective development.In order to suppress the reservoir bottom water coning,there were many previous attempts,to a certain extent controlling bottom water coning effect,but the effect was not ideal.With the current researches on the detailed reservoir description,there are a large number of different types of interlayer in meandering river point bar,and the interlayer has obvious effects on suppress the water coning.However varied interlayer makes the water movement complicated in the process of exploitation in bottom water reservoir and leads that the oilfield further tapping becomes very difficult.So the study that interlayer controls the bottom water drive can provide the basis for studying the distribution of remaining oil reservoirs and significant guidance for the EOR.On the basis of the theory of reservoir architecture,and deep understanding of the interlayer types and development methods in meandering river point bar,this article,using the method of physical experiment,and the design of the single interlayer model and the multiple interlayer model,the experiments of the bottom water flooding are done in the different exploitation ways,the different perforation locations and oil well spacing.The distribution of oil and water at different pore volume times of injected bottom water has been measured,and the correlations between different types of interlayer and the recovery rates have been determined.Finally the influence factors between the different types of interlayer and displacement of water and oil are concluded.The results of this study show that the interlayer has a significant control effect on bottom water drive.Interlayer can effectively restrain the water coning,improving the reservoir development;at the same time in the level of interlayer model than the oblique interlayermodel blocking effect of interlayer is stronger on the bottom water driver;the development effect of upperperforated model which perforated position is upper than interlayer is better than the perforation position lower than the interlayer model;well spacing is smaller,and the sandwich is more stable,and the recovery of the model is better.Finally the control effectof interlayer on the bottom water drive is proposed,in the multi layer model under the guidance of reservoir configuration.