Research On The Control System Of Oil Extraction Joint Station Based On PLC

At present, as for the exploration to the development of the various types of reservoir reservoir, each oilfield exploitation of underground crude oil has been widely into the tertiary period. Due at the beginning of the development of an oil production and the secondary oil recovery stage, most of the reservoir recovery efficiency is not high, the formation of a large part of producing reserves still have not been mined out, therefore, the urgent need in the tertiary oil recovery phase using a can effectively and significantly improve oil recovery method, in order to meet the demand of the increasing oil consumption country.Are introduced in this paper the displacement mechanism of carbon dioxide- foam system, on the basis of combining the reality of block, by measuring and comparing foam volume Vf, half-life t1/2 and comprehensive index(FCI three parameters, such as optimizing best start bubble effect of three kinds of foaming agent, a stabilizing foam agent, and ultimately selected three kinds of carbon dioxide- the foam system formula, respectively is: 1)0.4% CO + 0.4% FP388 + WP125; 2) + 0.1% CO2 + 0.4% FP246 WP125; 3) CO2 + 0.4%WP125 FP275 + 0.1%, and the foaming performance of CO2 + FP388 system best, CO2+FP275 the stability of the foam system is best, and with the increase of temperature, the stability of three kinds of foam system are reduced., to filter out the adaptability of three kinds of carbon dioxide- foam system to evaluate, identify three types of system are applicable to the target stratum, ultimately through the indoor oil displacement experiment,block the optimal injection system formula.Under three kinds of experimental temperature, three kinds of carbon dioxide- foam system after water flooding can enhance oil recovery by more than 20%, that three kinds of foam system has good ability to improve recovery factor, among them, the three kinds of temperature(45 ℃, 75 ℃ and 100 ℃), under the condition of CO2 + FP388 foam system of oil displacement effect is best, under three kinds of experimental temperature, the extent of its improved recovery of 25.3%, 22.8% and 21.6% respectively.