Numerical Simulation Optimization Of Development Mode Of XH Small Fault Block Reservoir

With the development of national economy,in the 1990 s,the consumption of oil and natural gas resources showed the contradiction between supply and demand.Some of the previously developed oilfields are also moving towards the end,with the output decreasing year by year,which has a huge impact on the oil and gas industry in China.Therefore,it is very important to research the development of oilfields and optimize the development plan.For the exploration of oil field,the final realization is the development of complex fault block reservoir in the region.The main areas of reservoir development in China are concentrated in the East,with obvious distribution characteristics.The small oil-bearing area and peculiar shape of this area also lead to the difficulty of production.Based on the above research basis,the research in this area needs a specific production mode.Based on the injection production pattern well,injection production layer and so on,combined with the analysis of water drive control degree,the optimal development of data simulation mode is discussed for the reservoir in the new area,and the next several aspects are studied.Firstly,the geological characteristics of small fault block reservoir in XH area are analyzed.Based on the division method of sedimentary microfacies,the sedimentary facies characteristics of main channel,beach and phreatic channel of fan margin are analyzed.Finally,the sand body of XH area is leveled The feature analysis of the area and the distribution analysis of the area plane.Secondly,geological modeling analysis of XH small fault block reservoir is carried out.For the analysis of reservoir geological modeling method,first of all,two methods of stochastic modeling and deterministic modeling are analyzed.Based on the reservoir modeling method,a more reasonable modeling and analysis of key steps are selected,and a geological modeling flow chart is established.After the study of model-based modeling method,the XH regional reservoir model is established.First,the structure of the model is analyzed,and the regional fault and top are analyzed Face.The second is to build the model of reservoir attributes,which is to build the models of porosity,permeability and saturation,analyze the distribution of the model’s positive and negative,as well as the distribution of main direction,secondary direction and vertical direction;finally,calculate the reserves based on the reservoir model.The third is the numerical simulation of XH regional reservoir.Firstly,the numerical simulation analysis of the reservoir model is carried out to calculate and analyze the rock and fluid properties;secondly,the reservoir characteristics analysis based on the historical fitting is carried out to analyze the productivity dynamic analysis based on the historical fitting,including the parameters such as porosity,permeability,effective thickness,initial fluid saturation field,initial pressure field and relative permeability curve.Secondly,the history fitting of oil distribution law is carried out;finally,the prediction analysis of future production is carried out.Finally,the analysis and optimization of reservoir development plan in XH area are presented.one is to analyze the index of development design scheme,establish different pressure maintaining level scheme of XH reservoir,analyze the water injection development pressure,select the reasonable water injection intensity and analyze the injection production well pattern of the reservoir;the other is to analyze the index boundary between the liquid production speed and water injection intensity of the reservoir in XH area.At last,the optimization development dynamic index of reservoir is predicted,and the reasonable parameters and schemes are selected to provide theoretical basis for the development and optimization of reservoir in XH region.