Abstract:

In order to apply physical simulation results to oil fields properly and provide theoretic direction for the oilfield development,similar equation analysis method is used to get the similarity criterion of polymer flooding reservoir,similarity criterion is divided into dependent criterion and independent criterion according to variable relation,taking recovery of polymer flooding as example,numerical simulation is used,sensitivity analysis is carried out for the similarity criterion,and the Second Theorem is used to study the mathematical model of the recovery of polymer flooding.The results show that there exists a multiplication relationship between the recovery polymer flooding reservoir and the similarity criterion.Based on this relationship,the recovery model of polymer flooding is established,in which the relative permeability coefficient is applied to modify model.physical simulation is consistent with the numerical simulation,the model can meet the requirement of the actual oilfields.

Key words: polymer flooding, similarity criterion, recovery, mathematical model, empirical formulae, degree of distortion 