METHOD OF DEVELOPMENT OF OIL POOL AND COMPOSITION FOR ITS EMBODIMENT Russian patent published in 1997 - IPC

FIELD: oil producing industry; applicable in development of waterflooded nonuniform deposits of oil. SUBSTANCE: oil is withdrawn from producing wells. Injected through injection wells are bioreagent and working medium in cyclic mode, holding of the process for 15-60 h after each cycle. In each cycle bioreagent-to-working medium injected volume ratio is (6-0.15):1. Bioreagent is used in form of composition including, mas. %: nitrogen-containing salt 0.05-0.4; potassium-containing salt 0.01-0.4; phosphorus-containing salt 0.1-0.7; water 0.09984-49.25; the balance, whey. Nitrogen-containing salt is used in form of ammonium chloride, ammonium nitrate, potassium nitrate, diammonium phosphate. Potassium-containing salt is used in form of monopotassium phosphate, potassium nitrate, potassium chloride. Phosphorus-containing salt is used in form of disodium phosphate, trisodium phosphate and diammonium phosphate. EFFECT: higher efficiency. 2 cl