DEVELOPMENT METHOD FOR OIL FIELD WITH CARBONATE RESERVOIR Russian patent published in 2007 - IPC E21B43/27 

FIELD: oil industry, particularly methods for stimulating production by forming crevices or fractures.

SUBSTANCE: method involves injecting working agent through injection wells and extracting oil through producing wells. Side well bores extend for depth of 20-100 m and are drilled in amount of 2-4 bores for each 1 m of reservoir thickness. Hydrochloric acid solution is injected in portions having specified volumes in accordance with predetermined regimes and injected treatment solution is extracted from well. Hydrochloric acid solution is forced in well with oil in pulsed mode in said regime. Reaction products and contaminants are removed by means of ejection plant or by swabbing operation along with reservoir influx flow parameter recording. Then well groups are joined in 5 or 7-point clusters having injection well in cluster center along with radial reservoir penetration. Working agent is injected in cyclic regime through central injection well. Additional hydro-acid reservoir fracturing may be also performed.

EFFECT: increased amount of oil to be produced and increased oil recovery.

2 cl, 1 ex