The Regular Distribution Of Remaining Oil In The River-delta Sedimental Facies After Polymer Flooding

DaQing oil field is a large scale river-delta sedimentary facies in the north of SunLiao plain, and imply abundant oil reservoir.After close 50 years's development ,it have been in its hige or extra high watercut stage. Be aimed at the need of this development stage,the taxt studied the regular distribution of remaining oil after polymer flooding.At first ,according to the geologic feature of DaQing oil field,we built heterogenetic concept models of rever-delta facies controlled by microfacies.Then we simulated the process of water flooding and polymer flooding in the models.And analysised and conclude the calculation result.t.Based on analyzing character of remained oil,we found the reason of remaining .And we studied the influence to the distribution of remaining oil from sedimentary micofacies,faults,rhyhm and the viscosity and consitration of polymer. At last,the regular areas of remaining oil were found.