Injection And Production Parameter Opertimization Of Block L

ASP flooding is a chemical flooding method of polymer,alkali and surfactant to reach the oil recovery rate in a certain proportion.The flooding effect of alkali/surfactant/polymer ASP flooding is not only affected by well pattern,well spacing,reservoir characteristics and fluid properties,but also by system viscosity and injection rate,injection procedure,injection mode and injection concentration of chemical agent.For a particular reservoir or oil field,the maximum oil recovery can be obtained under the condition of the same amount of chemical agent,or the lowest amount of the chemical agent can be obtained under the condition of the same oil recovery factor.The second kind of reservoir mainly refers to the sandstone reservoir between the main reservoir and the five types of reservoir.Its reservoir has more layers and reserves,but its permeability is lower than the main reservoir,its thickness is thinned,the scale of channel sand becomes narrower,and the continuity becomes worse.Based on the ASP flooding of heterogeneous second class reservoirs in L block,the fitting of injection and production wells and the distribution characteristics of remaining oil in L block are studied in this paper.The drilling geological data,well deviation data,single well small layer data,fracture point data and digital sedimentary facies data of L block are collected.The fine 3D geological model of L block is established by selecting appropriate modeling method.In this paper,the control variable method is used to select the injection parameters by using numerical simulation technology.By changing the concentration of alkali,surfactant and polymer in the main slug and secondary slug and keeping the other injection parameters unchanged,the concentration of alkali,surfactant and polymer in the injection parameters is determined by observing the amplitude of the final recovery increase.By changing the PV number of each slug,the injection velocity and pressure gradient,keeping the other injection parameters unchanged,observing the amplitude of the final oil recovery improvement,optimizing the optimal injection parameters of each slug,the compound oil displacement scheme is finally determined.