METHOD FOR PRODUCING WELL-KILLING FLUID AND SODIUM CHLORIDE FROM RESERVOIR WATER OF AN OIL FIELD

摘要

FIELD: technological processes.;SUBSTANCE: invention is intended for oil, chemical and mining industries and can be used for producing cheap well-killing fluid for oil wells and sodium chloride for technical needs or food salt based on domestically-produced raw materials. Method for producing well-killing fluid and sodium chloride from reservoir water of an oil field, which includes purification of initial reservoir water of the chloro-calcium type from mechanical impurities, oil residues, adjusting its density to the concentration of calcium chloride, at which sodium chloride is salted out, wherein the precipitate of sodium chloride being separated from the heavy salt solution by centrifugation followed by washing with initial reservoir water with removing residual calcium chloride and magnesium chloride salts, comprises using said water of the chloro-calcium type with a density of not less than 1,100 kg/m³, adjusting the density is adjusted by dissolving calcium chloride in it or by adding a heavy brine, after which the obtained heavy brine is diluted with fresh technical water to obtain well-killing fluid with having the required density.;EFFECT: reduced energy costs.;1 cl, 5 ex, 3 tbl