Study On Supplementary Infilling Adjustment Method And Potential Of Block Zhao292

The Zhao292 block was located in the southwest of Yongle.It has developed delta facies deposits.It was dominated by narrow channels and non-main thin sheet sands,with thin thickness and relatively well-developed layers.It was put into production in 2007,with few single wells and single wells.The thickness of the layer is thin,expanded in 2012 and 2014,the comprehensive water cut reached 70.1%at the end of 2018,the degree of intensification is low,the water cut of a single well is low,the average movable remaining oil reserve abundance is 6×10~4t/km~2,and the high value area Mainly distributed along the river channel,the remaining oil types are mainly fault edge type and water absorption type,and the adjustment countermeasures are mainly remaining oil in the center of the submerged well pattern.In addition,the low degree of waterflooding control in non-major formations is more difficult due to the increase in water cut,so it is more difficult to turn the wellhead into a measure well.There is an urgent need to obtain the remaining oil distribution law and characteristics and supplementary intensification adjustment plan research to improve development efficiency and ultimate recovery,so as to achieve the goal of improving the overall effect of oilfield development.Based on static data,production data and dynamic monitoring data,this article uses a combination of dynamic and static methods to provide directions for the implementation of supplementary encryption schemes.Through history matching,the long-term history of oil and water wells can be obtained,and then the distribution law of remaining oil can be studied in detail.On the other hand,in the vertical direction,the data shows that the remaining oil at the edge of the fault is difficult to effectively control and the poor water absorption effect of the water injection well is the main factor leading to the poor production status of the Zhao292 block.On the basis of reasonable intensification adjustment limits,three sets of specific adjustment methods are further formulated according to the development characteristics and distribution laws of remaining oil in the Zhao292 block,and according to the comprehensive comparative evaluation of the benefits of each adjustment method,Therefore,it is determined that the most effective encryption method for the Zhao292 block is:the use of the well pattern center and the flexible encryption method at the edge of the fault,which has increased by about 2.60%compared with the unencrypted,and the predicted final recovery rate is 19.96%.On a certain basis,this article can provide a meaningful reference value for medium-and long-term development planning or development adjustments during high water cut periods,so as to achieve the purpose of improving oilfield development effects,controlling high water cut blocks,and improving development benefits and ultimate recovery.