| After more than 40 years of water flooding development,Daqing oilfield has entered the stage of high water cut development,water flooding development has undergone one and two times encrypted adjustment.At present,some blocks have been encrypted and adjusted in the third time.It is more and more difficult to enhance the oil recovery by water flooding,and the economic benefit is poor,especially in the main reservoir.There is still a certain proportion of residual oil,and the remaining reserves is still large.Therefore,one block of the eastern Xing six area is selected as the research object of the ASP flooding.The displacment formula and the effect of the industrial extend for the ASP flooding in the main reservoir are clearly defined.The dynamic development regulation of the different stages and the perfect matching technology are summarized.It is very important for the sustainable development of the oil field.Therefore,by summarizing laboratory test and the development experience of injection agent block,this paper optimizes the formula of the ASP flooding displacement system,and finds a set of system formula suitable for a class of the ASP flooding in the oil layer of aprican north development area.The slug concentration is mainly slug Na OH concentration 1.2%,and the surface active agent concentration is 0.3%,the sub slug Na OH concentration is 1% and the concentration of surfactant is 0.2%.The combination of slug is 0.075 PV of prepolymer,0.35 PV of main slug and 0.2PV of sub slug,and the interval of reasonable injection rate is0.18 ~ 0.20PV/a.By analyzing the factors that influence the development effect of the ASP flooding,the dynamic regulation of the ASP flooding is summarized by analyzing the factors affecting the injection production capacity,the effect law and the change of the extraction agent,and the dynamic tracking and adjusting technology is studied according to the dynamic change characteristics of each development stage. |
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