CONTROL METHOD OF OIL POOL DEVELOPMENT Russian patent published in 2015 - IPC E21B43/20 

FIELD: oil and gas industry.

SUBSTANCE: according to the method a pool zone is selected with hydrodynamically related wells. Product is withdrawn from producers with production rate analysis. Displacement agent is injected to injectors, at that contour lines of wells mutual influence are defined and production rates of producers are corrected. Analysis of production rate for producers and displacement agent injection to injectors is based on detected interconnections of injectors with the respective producers against their total production rate. Real operation data is considered for the selected zones using historic data within the period from 1 up to 20 years with increment size of 1-3 months and current data for the time of optimization operations performance. By production rate control in the producers the volume of injection to the injectors is changed and redistributed considering impact of the respective producers and injectors. Total volume of injection is changed not more than per 10%. Cycles of withdrawal and pressure recovery at producers are regulated including time of cyclic forced product withdrawal during 2-3 months from producers with maintained or slightly increased water cut with further pressure recovery for these wells. At that remaining reserves are depleted using current stock of wells with increase in total production rate and decrease in total water production. Flows of fluid motion are redistributed till remaining oil reserves are depleted.

EFFECT: increasing oil recovery factor due to optimized operation modes for injectors and product withdrawal from producers.

4 dwg, 1 ex