The Research Of Development Adjustment On The Horizontal Well Region Of Z Block

Z block is a representative test block of horizontal well-vertical well joint development.Since the block has put into production,due to the complicated faults and the influence of initial way of well spacing,the injection-production condition of horizontal wells is relatively complicated,and the difference of their production capacity is large.The development effect of part of the horizontal wells becomes poor,so it leads to a great influence on the overall development effect of the block.So it is necessary for the research of development adjustment method on horizontal well region of Z block.In this paper,the concrete content is as follows:Firstly,structure characteristics,reservoir characteristics and fluid characteristics have been analyzed in the Z block.Through the drawed production dynamic curves of the block,dynamic characteristics of waterflood development,water cut rising and pressure change characteristics and so on have been analyzed and evaluated.With drawing production dynamic curves of horizontal wells,the characteristics of development performance of horizontal wells and fracturing effect have been analyzed.By summing up,the main problems of development on horizontal wells have been cleared,so it can provide a basis for the way of development adjustment on the horizontal well region;Secondly,according to the related parameters of formation,fluid and development in the Z block,the ideal models to study the adjustment have been established through the Eclipse software.Based on the simulated results,the adjustment ways have been optimized,and the related parameters have been determined.Therefore,it provides reference for final confirm of development adjustment method of the horizontal well region;Thirdly,using the basic static data,the 3D facies-controlled geological model of Z block has been established by Petrel modeling software.Then,the numerical model has been established applying black oil simulator E100 of Eclipse software.And then,the fitting of geological reserves and dynamic history have been conducted.On the basis of it,the distribution characteristics of longitudinal remaining oil,plane remaining oil and remaining oil of horizontal wells have been analyzed;Finally,in view of the main problems of development on horizontal wells,from the analysis on remaining oil,and following certain principles of optimization,applying the optimized adjustment ways and related parameters,targeted adjustment countermeasures to improve the development effect of horizontal wells have been proposed,and then the adjustment schemes have been predicted by simulation.Ultimately,the comprehensive adjustment countermeasures of Z block have been formulated.The study results can provide guidance for development adjustment on the horizontal well region of the block.