PROCEDURE FOR DEVELOPMENT OF OIL DEPOSIT WITH CARBONATE COLLECTOR Russian patent published in 2014 - IPC E21B43/16 E21B33/12 

FIELD: oil and gas industry.

SUBSTANCE: vertical injector and a horizontal producer are drilled, working fluid is injected to the injector and the product is extracted from the producer. A horizontal section of the producer is left uncased and placed above the oil-water level - in the middle interval of the oil saturated zone of the deposit. The injector is constructed till the oil saturated zone of the deposit is opened at the distance from the producer bottomhole that excludes breakthrough of the working fluid to the producer. In the producer a process pipe is installed that consists of in-series perforated nozzles with centralisers and water-swelling packers placed in-between so that they can close a tubular annulus hermetically if water content in the product exceeds 50%. During operation of the producer when the product is watered up to 90-95% the process pipe is cut off from the bottomhole opposite the respective packers.

EFFECT: improving production rate of the deposit, efficiency of oil displacement, increasing coverage area by the displacement agent due to its consistent workout, reducing water-content in the product.

1 ex, 1 dwg