DEVELOPMENT METHOD OF HEAVY OIL OR BITUMEN MINE FIELD WITH CONTROL OF WELL PRODUCT EXTRACTION Russian patent published in 2013 - IPC E21B43/24 E21B43/12 

FIELD: oil and gas industry.

SUBSTANCE: development method of heavy oil or bitumen deposit with control of well product extraction involves construction of upper injection and lower production wells with horizontal sections located one above another. At construction of wells their horizontal sections are equipped with filters installed opposite productive formation zones. Inside filter with non-perforated interval in production well there arranged is a shank provided with inlet holes dividing the filter into extraction zones. Besides, shank is equipped on the inner side with a stock with side channels. Inner space of stock is interconnected with inlet of pump lowered to production well on the tubing string with possibility of longitudinal movement of the tubing string together with pump and stock in the shank. Heat carrier is pumped through horizontal injection well with warming-up of the formation by creating the steam chamber, and product is extracted through horizontal production well. Thermograms of steam chamber are taken, the chamber's warm-up state is analysed for uniform heating and available temperature peaks, and considering the obtained thermograms, uniform heating of steam chamber is performed. Before the tubing is lowered to production well, first, stock is lowered with a shank concentrically arranged on it and fixed in transport position with a shear screw. Besides, on the outer side of the shank lower end there installed is heat-resistant packer; after the stock is lowered to production well, lower end of tubing is put on its upper end. Tubing is equipped with a pump. Tubing is lowered to production well till the packer is arranged at non-perforated interval of production well filter; after that, packer is installed by dividing the filter of production well into two extraction zones - initial and final. Uniform heating of steam chamber is performed by supplying the heat carrier through injection well. Penetration of heat carrier and/or formation water to the pump inlet is avoided by controlling the product extraction to the pump inlet from the initial extraction zone. Besides, product extraction volume is reduced in the initial extraction zone where temperature peaks occur. For that purpose, inlet shank holes corresponding to the initial extraction zone are made with reduction of carrying capacity from face to head, and side channels of stock are provided with possibility of alternating interaction with one of inlet shank hole in the initial extraction zone. This is performed by restricted longitudinal movement of pipe string together with pump and stock relative to shank by increasing or reducing the number of connection pipes on upper end of pipe string depending on the distance between inlet holes of the shank. Pipe string is fixed on the head of production well in the required position by means of a face plate on a supporting flange, and shank hole corresponding to the final extraction zone is made in the form of an open stock end.

EFFECT: improving the control of product extraction volume from extraction zones; simpler erection and lower metal consumption on the design.

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