Fractured Horizontal Well Pattern Optimization In Daqing M Block Low Permeability Oil Reservoir

The permeability of low permeability oilfield is low in the periphery of daqing oilfield,and the reservoir is poor in physical property.At the same time,the reservoir is thin and the natural energy is limited.Most Wells have low natural capacity and are difficult to develop.In order to effectively develop this kind of reservoir,the test area USES the joint well pattern of straight well fracturing horizontal well,and the combined well network is arranged for different reservoir geologic features.According to the field practice shows that combined well pattern development can effectively improve the single well production capacity and stable time,increase production effect is obvious,but because of the strong reservoir heterogeneity,face part of the oil well water channeling is serious,fill well pattern adjustment difficult problem.Urgently need to be in the form of combined well pattern of needle fracturing horizontal well water breakthrough direction,well pattern adaptability research,so as to formulate rational and effective adjustment scheme,provide theoretical guidance for the efficient development of the reservoirs.After investigating the fracturing horizontal well both at home and abroad this paper capacity,on the basis of the present research situation of combined well pattern of horizontal Wells,combined with the low permeable oil fields of daqing M blocks in exploration and development present situation,the production performance data,carried out the rule of block water breakthrough research;The fine geological model of reservoir is established,and the feasibility of the model is verified by the numerical simulation of the block,and the pattern of different coalesce pattern and different sedimentary facies patterns of the vertical well horizontal well are studied.On this basis,the injection-production well group in the area,transfer time,transfer mode,the new old well injection intensity optimization adjustment,to carry out the optimal development plan to predict the production performance?Through research,the optimization scheme recovery degree was 25.85%,the recovery degree 4.76% increase compared to the original plan.Through optimization design and prediction,the next development direction of this block is determined,which lays a foundation for the efficient development of the thin interlayer low permeability block.