Abstract: There are some defects to liquid scale inhibitor, such as interval injection, chemical feed fluctuation, short-effect, high consumption and unstable effect, aiming at the defects, the main parts of scale inhibitor are synthesized and then the proportion of synergist, binder and additive decided, molding methods and processes studied. A method is established to evaluate the average dissolution rate of the solid scale inhibitor under the conditions of 80℃, average static dissolution state is 0.130 8g/d cm2 and dynamic dissolution state is 0.159 2g/d cm². The inhibition effect can reach 98.9% when the concentration is 10 mg/L. Solid scale inhibitor ZGJ-1 has been used in Shengli Oilfield.

Key words: synthesis, solid, scale inhibitor, molding process, evaluation