METHOD FOR FORMATION WATER-GAS SIMULATION DURING OIL DEPOSITS DEVELOPMENT Russian patent published in 2017 - IPC E21B43/16 

FIELD: oil and gas industry.

SUBSTANCE: according to the method, preliminary, on a hydrodynamic formation model target volumes are determined of alternating water and gas slugs for injection into the formation corresponding to the maximum value of the oil recovery factor. Then, a target gas slug volume is injected into the injection well. Then, the injection well is stopped before the pressure reduction in the well bore zone to the value of the average formation pressure at the time of termination of the gas injection into the formation, covered by the injection well influence. Further, the injection well is pumped the first part of the target water slug with a minimum technologically possible injectability to reduce gas saturation of the well bore zone to the value of residual gas saturation. This value is achieved upon stabilizing the injectability dynamics of on the formation. After that, the injection well is further pumped with the rest of the target water slug volume with maximum technologically possible injectability until recover of the formation pressure at the level of the initial value or above. The above pumping cycle is repeated in the oil deposit development.

EFFECT: enhanced oil production.

3 dwg, 3 tbl, 1 ex