In view of the oilfield water scaling problems, the scaling tendency, scaling component and core damage rate experiments were studied through indoor static analysis and the core flow experiment. The results showed that the main component of the scale was iron hydroxide, barium carbonate, calcium carbonate and a little magnesium carbonate. Static damage rate of scaling was 9.6%, and dynamic damage rate was 34.3%, and the damage rate of iron deposition was 56.7%. Hence, it is important to research on the compatibility of raw water and formation before injection raw water, which could reduce reservoir damage to the lowest limit and improve the development effect of oil field.