The Research On Development Of Technical Policy Limits In Block X Of Putaohua Oilfield

With the huge consumption of oil and gas in China's industrial development and the huge demand for oil in the future,it is increasingly important to carry out research on thin difference reservoirs.In China,the thin difference reservoir has abundant reserves and wide distribution area,and has great development potential.In this paper,the block belongs to the development of thin layer,with large lithology and physical property variation range and strong heterogeneity.With the prolongation of the development time,various development problems are becoming more and more obvious,such as unbalanced formation pressure,fast oil well production decline and low degree of water drive control.It can be seen that according to the current development situation,the technical policy boundaries established at the early stage cannot match with it.Therefore,it is necessary to explore the limitations of the optimal technical policy for thin-layer reservoir development.On the premise of analyzing the well pattern and dynamic data of the target block,using theoretical method and numerical simulation method,and combining the dynamic production data during the production process,the technical boundary policy research for this type of reservoir oilfield is carried out.Firstly,the main controlling factors of waterflooding development effect are analyzed by combining theoretical chart and empirical formula,and the current waterflooding development effect is evaluated from the aspects of comprehensive water cut,water cut rise rate,water drive index and water drive characteristic curve.Secondly,a three-dimensional fine geological model is established,and the geological reserves and recoverable reserves are re-verified according to the secondary interpretation results of well logging.Furthermore,reservoir engineering method and numerical simulation technique are used to determine each injection-production parameter.Finally,the limits of reasonable development technology policy of the research block are determined,and a reasonable adjustment scheme is put forward,and the development effect is predicted.The results show that the oil production increased by 41.12×10~4t,the recovery rate increased by 2.33 percentage points,and the oil production increased obviously,so the comprehensive adjustment program is reasonable and feasible.The research results of this paper have important guiding significance for rational and efficient development of thin differential reservoirs,enhanced recovery and economic benefits,and provide theoretical guidance for rational adjustment of well pattern plan in the next step,as well as reliable reference experience for the same type of oilfield.