In recent years

the application scale of chemical flooding technology has been increased

but the results of some field tests are not ideal. There are many reasons for this situation

including the adaptability of profile control and displacement agent with reservoir pores. Aiming at the actual demand of field production and theory

the evaluation method and technical index of transport capacity of chemical profile control and flooding agent are studied. The results show that the transport capacity of profile control agent in porous media is a necessary condition for realizing the diversion of deep l

iquid flow. The transport capacity can be evaluated by the ratio of the pressure difference（

β

） between the front and the back of core at the end of injection of profile control agent. The recommended technical index ranges are as follows: ①

β

=1~3

good transport capacity; ②

β

=4~8

medium; ③

β

=9~15

poor; ④

β

16

poor. The retention and transport ability of profile control and displacement agents are closely related to the molecular structure of materials

aggregate size and core permeability. Their purposes are contradictory and need to be taken into account reasonably in practical application. Viscosity is an index to evaluate the internal friction of fluids. The internal friction of polymer solution is related to polymer concentration

molecular aggregate morphology and salinity of solvent water. The size of polymer aggregates can be changed by intermolecular physical association and chemical cross-linking reaction

which can increase the friction force and viscosity of polymer solution

but this will also lead to poor transport capacity of polymer solution

and then weaken the deep retention and liquid flow diversion effect of polymer solution.