Study On Gaotaizi Oil Reservoir Evaluation And Nonlinear Flow Theory And Its Application

In this dissertation, based on low permeability fluid mechanics, daqing Fuyang oil reservoir were studied.Combining with the physical simulation experiments, fluid mechanics of flow in porous medium, numerical analysis and field practical, and pore structure was researched. The main research results are as followed:(1)Based on the research of the experiments with conventional mercury penetration, nuclear magnetic resonance, constant rate mercury penetration and non-linear flow test, Fuyang oil reservoir was studied,with regard to microcosmic pore configuration, percentage of movable fluid, poroperm characteristics, pressure-sensitive effecct and so on, and lastly the reservoir physical characteristics of Fuyang oil reservoir are generalized.(2)Combining with nuclear magnetic resonance and low permeability physical simulation, a new method of testing movable oil saturation was established, and the distribution character of movable oil and irreducible oil was presented in low permeability reservoir.(3) The concept of the use coeffieient was presented and the use coeffieient of the reservoir can be quickly obtained.Based on the basie formula of non-linear flow model, the formulas of individual well Producing rate and the use coeffieients were deduced. The results can be used for low permeability reservoir well optimum pattern of site development programs and reservoir effective pressure evaluation.(4) Low permeability non-liear numerical simulation software and well pattern quick evaluation software were drawn up, and the softwares were applied to Fuyang oil reservoir on effective pressure and well pattern.