In this work, based on the actual situation of sanding in W oil field in the South China sea, and combined with related sand control theory and some theory of the feasibility of simplified sand control such as physical property of the stone, sand prediction ,using a visual blocking simulation experimental apparatus to prove feasibility of the simplified sand control. Based on the sand blocking effect and the leakage amount of sand, demonstrate the feasibility about simplified sand control in this oilfield adjusted well and give recommended values about precision of screen of the well. The experiment demonstrate that the well cannot use simplified sand control if the D₅₀ is smaller than 0.06mm; if D₅₀ is bigger than 0.06mm, simplified sand control is possible. At last, it gives a comprehensive demonstration about simplified sand control of this oilfield and sand control technology of different well.