RECOVERY METHOD OF OIL DEPOSIT IN CARBONATE RESERVOIRS, COMPLICATED BY THE EROSIVE CHANNEL Russian patent published in 2017 - IPC E21B43/20 E21B43/14 

FIELD: oil and gas industry.

SUBSTANCE: according to the method, the deposit and channel bead oil-drainage boundary is specified. Determine the oil-filled thickness of productive terrigenous reservoirs in the erosive channel. Provide the drilling of productive, including the horizontal downholes in productive terrigenous reservoirs of the erosive channel with breaking of its bead, and the injection downholes. The products are selected from the downhole and the working agent is injected into the reservoir through the injection downholes. The horizontal downholes are drilled from the oil deposit in the carbonate reservoirs into the productive reservoirs of the erosive channel. From the horizontal section of the production downhole, several additional multidirectional sections are drilled in the productive reservoir of the erosive channel. Provide the secondary breaking of the productive downhole in the intervals of the erosive channel productive reservoir horizontal sections. The rest of the downhole section from the other side of the bead is breaked at the entire interaction section with the deposit in the carbonate reservoir. The breaking intervals separation of the horizontal sections from the breaking interval in the oil deposit is made by the device for dual operation, by which provide the products selection from the separated intervals independently.

EFFECT: coverage increase by the reserve recovery of the oil deposit in the carbonate reservoirs, complicated by the erosive channels and in the productive terrigenous reservoirs, located in the erosive channel.

1 ex, 1 dwg