THERMAL SHAFT METHOD OF HIGH-VISCOSITY OIL POOL DEVELOPMENT Russian patent published in 2014 - IPC E21B43/24 

FIELD: oil and gas industry.

SUBSTANCE: method envisages allocation of conventional components with height corresponding to the oil stratum thickness at the deposit area, drilling of injectors from the surface to the central part of each conventional component with determination of the most permeable layer at the lower part of each conventional component according to geological and geophysical data, drilling of producers from the mine opening to the most permeable layer in each conventional component. The most permeable layer of several conventional components in opened by one producer when the most permeable layer is placed in the adjacent components at the same level or higher than in the components penetrated earlier. The producer bottomhole is placed at the external boundary of the conventional component. A hydraulic connection is defined between the injector and producers in each conventional component. When such hydraulic connection is unavailable between the injector and producers such connection is ensured by hydraulic fracturing, for example. Injection of a heat medium is made to all injectors, at that each injector is cased to the depth from the formation mouth up to the top. Parameters of the fluid are controlled in each producer. When the heat medium is broken to the producer of any conventional component, measures are taken to increase the distance between the injection area and production area, for example, an isolating mud injecting to the injector. The same measures shall be repeated several times when the heat medium is broken to the same producer in the same conventional component until the injection area in the injector rises up to the bed top. The heat medium is injected till stocks are completely depleted in this conventional component with further shutoff of the injector in it.

EFFECT: increase of the bed oil recovery factor due to simultaneous component-by-component coverage of the whole area of the developed site by heating and drainage by means of controlled steam injection and oil recovery from each specific zone.

7 cl, 1 ex, 5 dwg