METHOD FOR DEVELOPMENT OF WATERED OIL DEPOSIT Russian patent published in 1998 - IPC

FIELD: oil production industry. SUBSTANCE: this is aimed at increasing oil output due to enlarged embracing of bed by watering and reducing permeability of water-passing passages. According to method, initially injected into injection wells is sediment producing reagent which is waste of petrochemical production process containing 10-15% of sodium hydrate in mass. Injection is effected with use of 8-12 g of reagent per 1 m of bed thickness in one injection well. Then, injection wells are started for operation. After some period (1-2 months) nearest producing wells will react to aforesaid action by reduced watering of recovered liquid. Water is injected into injection wells until watering of recovered liquid reaches value existed in nearest producing wells prior to aforesaid treatment. Then, sediment producing reagent is again injected into same injection wells. EFFECT: high efficiency.