METHOD FOR OIL FIELD DEVELOPMENT Russian patent published in 2007 - IPC E21B43/22 

FIELD: oil production industry, particularly to limit water inflow in production well during oil field development.

SUBSTANCE: method involves drilling wells in productive reservoir; injecting water via injection wells and producing oil through producing wells; injecting aqueous sodium silicate and calcium chloride solutions at later development stage. First of all 9% aqueous calcium chloride solution is injected so that aqueous sodium silicate solution volume is equal 10% of pore volume. Then buffer agent is delivered in amount equal to oil-well tubing volume. After that 40-50% aqueous sodium silicate solution is injected so that aqueous sodium silicate solution volume is equal to 20% of pore volume. Then buffer agent is repeatedly delivered in amount equal to oil-well tubing volume. Finally 10% carbon dioxide solution is injected in amount of 10% of sodium silicate solution. The buffer agent is 10% ethylene glycol ester or 5% sodium aluminate solution. Acetic acid may be added to sodium silicate solution in amount of 0.25% by volume.

EFFECT: increased admissible pressure gradient in gel mass obtained in productive reservoir and possibility to regulate gel mass properties.

2 cl, 2 ex, 4 tbl