Reservoir Modeling And Numerical Simulation Of Putaohua Oil Layer Of BP11 Well Area In Songliao Basin

BP11 well block is located in the Sanzhao Depression of Songliao Basin.,whose main oil-producing layer is the Putaohua oil layer in the first member of the YaoJia formation,and the area of the well block is about 8.6km².The well area has entered the stage of development adjustment,problem such as water cut rising,yield decreased obviously,whose main reason is that the study area reservoir geology and reservoir physical parameters is not accurate,remaining oil distribution is not clear.This paper integrated use of geologic,logging and production performance data to carry out the reservoir geologic characteristics and characteristics of reservoir physical property research,on the basis focus on the 3d geological modeling and reservoir numerical simulation,the analysis of characteristics of remaining oil distribution,the optimizing development plan.The study area was divided into three layers:PI2,PI3 and PI5,and the small layers were further divided into six fine layers by using the method of marker layer control and sedimentary cycle support.Single well facies and the connected well faces are studied by using logging data,even the peace faces studies well,main types of sedimentary microfacies are identified in the study area are underwater distributary channel,estuary dam,sheet sand and distributary bay.An underwater distributary channel is developed from north to south,and multiple shunting occurs in the study area.Using logging data,carried out by using the method of logging secondary interpretation of reservoir physical property research,establish the study area reservoir physical property parameter interpretation model,and according to the reservoir physical parameters are calculated by the model.The average porosity of the study area was 18.7%.The average permeability is 7.78×10^-3?m².The average mean of oil saturation was 55.4%.The three-dimensional geological model of reservoir was established by Sequential Gaussian Simulation,and the distribution characteristics of porosity,permeability and oil saturation in the study area were quantitatively analyzed.PI31has the best development of pore permeability,high oil saturation.The result of reserve fitting is 174.62×10⁴t,compared with the original geological reserves of168.2×10⁴t,the fitting error is 3.82%and the fitting degree is higher.The residual oil characteristics of the study area were analyzed quantitatively by using the numerical simulation technique of reservoir,and the research area was only6.15%,and the remaining oil reserves were 163.96×10⁴t.This paper analyzed the distribution of residual oil in the study area on the vertical and the plane.The remaining oil content of PI31 fine layer is the highest,which is the potential level of the research area.In the southeast and western regions of the research area,the residual oil content is higher due to the occlusion of the fault.The optimum development scheme of the research area was determined by using the numerical simulation of oil reservoir to analyze the different injection-production ratio and the strength scheme.The best injection-production ratio is 1,and the optimum extraction strength is 0.24.