A Study On The Mining Method For The Horizontal Well Of Tight Oil After Volume Fracturing In Block Of L26

The technology of Multi cluster volume fracturing on horizontal well is an Important technical means to Improve the productivity of low permeability tight reservoirs and solve the problem of difficult reserves of such reservoirs.It has been applied more and more widely in tight oil exploration and development in Daqing.The scale of the horizontal well is very large,has reached thousands of cubic meters of sand and tens of thousands of cubic meters of liquid.The percolation mechanism after pressure is very complicated,The impact analysis of fracturing fluid on reservoir is not clear enough,There is no corresponding theoretical support for formulating reasonable mining method after fracturing.Through this study,a compact oil level suitable for Daqing L26 block has been formed.Build the method of “Braised well,control row,pressure preservation” on production,Achieving full life cycle management of horizontal wells,increasing tight oil recovery and ensuring maximum utilization of resources.This paper analyzes and studies the osmotic mechanism and reservoir damage evaluation of tight oil horizontal wells after pressure.By comparing and analyzing the production data and reservoir physical properties of the blockof Daqing L26,we can optimize the shuting time after fracturing.Study of dense oil horizontal wells flowback mechanism,establish ed the crack forced closure model,analysed the Force of proppant,formed a post pressure injection control method considering the closure of fractures,which guides the injection of tight oil well after pressure.The energy contribution of elastic mining after tight oil horizontal well is studied.Calculation by the mining fluid index,with the method of predicting the yield of output.Guidancing technology on the oil testing.At the same time,the working principle of screw pump and hydraulic pump is studied,and the parameters of pump row optimization are combined with the actual production data.The productivity change rule of tight oil horizontal well after compression is studied.,Explain the use of short-term oil well testing,medium and long-term productivity prediction,making long-term production plan.