OIL DEPOSIT DEVELOPMENT METHOD Russian patent published in 2013 - IPC E21B43/16 

FIELD: oil and gas industry.

SUBSTANCE: at deposit development oil is extracted through production wells and working agent is pumped through injection wells in cyclic mode. Cyclic mode of injection wells operation lasts 7 days, during 5 days of which the working agent is pumped each day for not more than 8 hours, the rest of the time the pumping is stopped, and for 2 days the working agent is pumped without pumping stop. In production wells that have hydro dynamic connection with the said injection wells in order to provide the cyclic mode of injection wells operation there set are oil extraction modes proportional to working agent pumping minus losses for compensation, and production wells are switched into regular operation well. For cyclic mode of injection wells operation the working agent is pumped during 5 days, each day from Monday till Friday for not more than 8 hours at night time from 23.00 pm to 7.00 am in the period of preferential rates for electricity. In cyclic mode of operation pumping is intensified in injection wells in the course of working agent pumping period to reduce formation pressure.

EFFECT: increase in oil recovery and reduction of oil extraction expenses.

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