METHOD FOR MODELING SALT DEPOSIT ON DOWNHOLE EQUIPMENT PARTS Russian patent published in 2006 - IPC E21B37/06 

FIELD: oil and gas production, particularly experimental research of salt deposit processes in downhole equipment, to design new downhole equipment and construction materials for downhole equipment production.

SUBSTANCE: method involves preparing model mixture, which imitates formation fluid and includes aqueous solutions and suspensions of corresponding salts and/or salt-forming substances; delivering the model mixture to sample, which imitates downhole equipment part. Before model mixture supply the model mixture is saturated with gas under pressure exceeding atmospheric pressure, wherein the gas form salt-forming composition as a result of reaction with at least one salt included in the model mixture and/or formed in the mixture. The salt-forming composition provides creation of stable aqueous solution having aqueous solubility limit, which provides stable aqueous solution forming under predetermined initial salt concentration in model mixture. Sample is heated up to temperature providing downhole conditions imitation so that sample surface temperature exceeding temperature necessary for salt-forming composition decomposition reaction, which leads to initial salt precipitation on above surface, but is less than model mixture boiling temperature.

EFFECT: increased amount of testing.

19 cl, 1 tbl, 2 ex, 2 dwg