The High-Pressure Physical Property Characteristics Of Black Oil Reservoirs In Bohai Oilfield

The physical properties of black oil reservoirs in Bohai oilfield are complex,and the corresponding high-pressure property parameters are the basis of the evaluation and rational development of reservoir.Therefore,it is significant to realize the efficient development of oil reservoirs by studying the high-pressure property characteristics of different types of black oil reservoirs.On the basis of PVT experiment method,mathematical statistical analysis method and the neural network method,carrying out the following work:(1)On the basis of development conditions and geological structures of Bohai oilfield,classifying black oil reservoirs,and carrying out PVT experiment analyses of the black oil samples in Bohai oilfield;(2)Studying the characteristics of the well flow properties,the single flash characteristics,the characteristics of the constant mass expansion,the characteristics of multistage degassing and the viscosity characteristics of the various types of crude oil.(3)To study the relationship of high-pressure physical property parameters and depth by mathematical methods;Based on the historical empirical formula and regression analysis method,analyzing the high-pressure property parameters in Bohai oilfield and obtaining the corresponding prediction model.(4)According to neural network algorithm,establishing the prediction models of high-pressure property parameters,and comparing the models with other methods.Through the above research,obtaining the high-pressure physical properties features of different types of black oil in Bohai oilfield,as well as the parameters variation range and distribution,provides the basis for reservoir evaluation.Besides,to select the prediction model of high pressure property parameters,lay the foundation of the PVT data prediction and comparison and efficient development of reservoir.