METHOD FOR PRODUCING COMMERCIAL FORM OF ALKALINE EFFLUENTS FROM PRODUCTION OF CAPROLACTAM FOR USE IN THE OIL INDUSTRY AND METHOD FOR OBTAINING ON ITS BASIS A COMPOSITION FOR EQUALIZING THE INJECTIVITY PROFILE AND LIMITING THE WATER INFLOW Russian patent published in 2018 - IPC C09K8/42 E21B33/138 

FIELD: oil and gas industry.

SUBSTANCE: group of inventions relates to development of oil fields. In method for obtaining the commodity form of the alkaline runoff of caprolactam production ARCP, the estimated amount of the ARCP and water is loaded into a thermostated reactor, into the obtained aqueous solution of the ARCP with stirring and at a temperature of 50–65 °C is slowly added PAA, after which the heating of the reactor is stopped, the ratio of said components, mass%: ARCP 6.5–89.0; PAA 0.3–0.5; water 10.5–73.0. Method for obtaining a composition for equalizing the injectivity profile and limiting the water inflow comprises mixing in a volume ratio of 1:1 a preliminarily prepared aqueous solution, which is the product of the above-prepared ARCP product, using a pre-prepared aqueous solution of aluminum oxychloride or aluminum chloride with a concentration of 2–3 % by weight.

EFFECT: obtaining in conditions of chemical production of a stable commodity form of alkaline runoff of caprolactam production ARCP used to equalize the injectivity profile and restrict the water inflow in the oil industry and providing the formation of copolymers of esters as a result of the hydrolysis of PAA polyacrylamide in the aqueous solution of ARCP both in amide and in acid groups, which leads to a decrease in the consumption of PAA.

3 cl, 8 dwg, 7 tbl