COMPOUND FOR RESTRICTING WATER INFLOW TO WELL Russian patent published in 2000 - IPC

FIELD: oil production industry. SUBSTANCE: compound can be used for limiting water inflow to oil and gas producing wells and also for regulating injectivity profiles in injection wells. Compound has following components in following proportion, mas.%: polyacrylamide, 0.2-0.8; potassium bichromate, 0.02-0.01; 45-55-% water solution of chlorous metallilhexamethylenetetramine (bactericide), 2-10; water, the balance. Application of aforesaid compound enhances efficiency of limiting water inflow due to higher thermal stability of created gel at its interaction with brine water and due to prolonging isolation period. EFFECT: higher efficiency. 1 tbl