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

FIELD: oil and gas industry.

SUBSTANCE: method includes specification of oil bearing contour of the deposit and the cut edge, determination of oil-filled thickness of the productive terrigenous formations in the erosive channel, drilling of production wells, including horizontal wells in the productive terrigenous formations of the erosion channel with the opening of its edge, and injection wells. Initially the number of formations in the erosive channel is determined. A production well is drilled from the oil deposit in carbonate reservoirs with several horizontal sections that open corresponding production formations in the erosion channel. Secondary opening is performed at each horizontal section of the well in the erosive channel intervals and oil deposit in the carbonate reservoir. Selection of products is carried out using a device for simultaneous-separate operation, regardless of the channel and the carbonate reservoir. The working agent is injected through injection wells.

EFFECT: method allows to increase oil recovery from reservoir, increase the coverage of oil deposit reserves in carbonate reservoirs and in productive terrigenous reservoirs located in an erosive channel.

2 dwg, 1 ex