Abstract: Sanding evaluation by radial flow experimental study is presented and experiment instrument of sanding is developed.In view of the general purpose of metal fibre screen，mat screen and slotted screen in Bohai Oilfield，sand production experiments with surrounding rock action are carried out.Relationship between sand production and oil production rate are analyzed and particle size of sand production is measured.Sand production behavior is observed.The results show that mat screen has good function in preventing jam of clay，slotted screen takes second place，metal fibre screen is easily jammed by clay，so metal fibre screen should not be used in high clay formation.Particle size analysis for producing sand of different screens shows that particle size of sanding is bigger in early production period and continuously decreases with the experimental proceeding.The biggest partical size of sand can be 2-3 times to sand control parameters.This shows that sand bridge can be build around screens.After the filling of sand annulus between screen and formation with sand,oil production rate decreases and permeability is improved with minute sand partical producing.Producting rate of metal fibre screen is lower than that of other screens.Producting rate of metal fibre screen is sustained，while that of mat screen has fluctuating.

Key words: heavy oil, sanding law, experiment instrument of sanding, screen, experimental study