METHOD FOR DEVELOPMENT OF OIL-GAS DEPOSIT Russian patent published in 1996 - IPC

FIELD: oil and gas producing industry. SUBSTANCE: method involves injection of water to produce water barrier in the zone of initial gas-oil contact; withdrawal of gas from gas cap and oil from the region between the wells of barrier flooding and the nearest row of wells located in the oil zone, and injection in this region of chemical reagents. Water is pumped when water barrier is formed at equality of average pressure values on the line of row of wells of barrier flooding and that of the nearest row of wells located in the oil zone. Oil recovery and injection of chemical reagents are started after formation of water barrier and executed with maintaining the equality of average pressure values in gas cap and in the zone of initial gas-oil contact. EFFECT: higher efficiency of the method due to reduced volume of injected and withdrawal water.