METHOD FOR PREPARATION OF BASE BRINE WITH HIGH DENSITY FOR CREATION OF KILLING AND COMPLETION FLUIDS

摘要

FIELD: oil and gas industry.;SUBSTANCE: invention relates to oil and gas industry, in particular to process fluids for killing wells, and can be used for well repair and completion. Method for preparation of basic brine for creation of killing and completion fluids involves dissolution of zinc chloride, calcium chloride, sodium chloride, calcium nitrate in water and additional introduction of potassium and magnesium chlorides, with the following ratio of components, wt%: zinc chloride 26–29.5; calcium chloride 19–23; calcium nitrate 16–26; potassium chloride 1–5; magnesium chloride 0.1–5; sodium chloride 0.3–1 and water – balance.;EFFECT: wider field of application of basic high-density brine for creation of killing fluids, possibility of use in wells with abnormally high bed pressure, reduced time of development and output of well after repair for pre-repair operation.;1 cl