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Network model modeling of microcosmic remaining oil distribution after polymer flooding
WANG Ke-wen1,SUN Jian-meng1,GUAN Ji-teng2,HOU Jian3
(1. Faculty of Geo-Resource and In formation in China University of Petroleum,Dongying 257061,China;2. College of Physics Science and Technology in China University of Petroleum , Dongying 257061, China;3. College of Petroleum Engineering in China University of Petroleum,Dongying 257061, China )
Abstract:
Using network model, the effects of the pore radius, connection,hanogeneity and wettability on the content and the distribution of the microoosmic remaining oil were studied. In the modeling, the features of polymer s non-linear viscosity, absorption and trap were considered. The microoosmic remaining oil was divided into three types that are isolated remaining oil, strip remaining oil and network remaining oil. The results indicate that with the increasing of the pore size, isolated remaining oil increases and network remaining oil reduces. With the increasing of the oonnectic?i, isolated remaining oil increases while the changing trend of the other two types is varying. The hanogeneity of the reservoir has great influence on the isolated and network remaining oil. In three factors, the proportion of network remaining oil is more than the other two kinds remaining oil. With the increasing of the wettability of the reservoir, the remaining oil saturation decreases slovs^y.
Key words:  network model  polymer flooding  remaining oil  microcosmic distribution  numerical simulation