The rapid changing near source,multi-stream depositional environment of conglomerate reservoirs leads to severe heterogeneity,complex lithology and physical properties,and large changes of oil layer resistivity.Quantitative evaluation of water-flooded layers has become an important but difficult focus for secondary development of oilfields.In this paper,based on the analysis of current problems in quantitative evaluation of water-flooded layers,the Kexia Group conglomerate reservoir of the Sixth District in the Karamay Oilfield was studied.Eight types of conglomerate reservoir lithology were identified effectively by a data mining method combined with the data from sealed coring wells,and then a multi-parameter model for quantitative evaluation of the water-flooded layers of the main oil-bearing lithology was developed.Water production rate,oil saturation and oil productivity index were selected as the characteristic parameters for quantitative evaluation of water-flooded layers of conglomerate reservoirs.Finally,quantitative evaluation criteria and identification rules for water-flooded layers of main oil-bearing lithoiogy formed by integration of the three characteristic parameters of water-flooded layer and undisturbed formation resistivity.This method has been used in evaluation of the water-flooded layers of a conglomerate reservoir in the Karamay Oilfield and achieved good results,improving the interpretation accuracy and compliance rate.It will provide technical support for avoiding perforation of high water-bearing layers and for adjustment of developmental programs.