METHOD OF CLUSTER WATER INJECTION INTO FILL-IN WELLS Russian patent published in 2010 - IPC E21B43/20 

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to oil production and can be used in development of oil accumulations and operation of formation pressure maintenance system. Substance claim: proposed method comprises regulation of injection volume with due allowance for threshold value at certain injection volume per certain period of time to inject preset volume during said period of time. In compliance with this invention, in cyclic water injection into fill-in wells, threshold water injection volume for every well is selected, smaller than preset injection volume for certain time interval but making main injection volume of up to 95% of preset volume. This volume reached, injection is effected in smaller volumes increasing volume to preset one and, thereafter, pump-up conditions are selected with injection pressure and rate regulation. Further, main and pump-up conditions are alternated, distributed among different wells and carried out simultaneously by the same pumps.

EFFECT: reduced clogging of fill-in well formations, injection capacity decrease rate, as well as longer life and lower probability of fractures at high-pressure water ducts.

1 ex, 3 dwg