METHOD FOR DEVELOPMENT OF HIGH-VISCOSITY OIL AND/OR BITUMEN DEPOSITS WITH OIL-WATER ZONES Russian patent published in 2014 - IPC E21B43/24 

FIELD: oil and gas industry.

SUBSTANCE: invention is related to the oil industry, in particular, to a thermal method for production of high-viscous oil and/or bitumen when oil-water zones or oil-water contact are available. The concept of the invention is as follows: the method includes construction of a horizontal producer and an injector placed above with installation of casing strings, injection of a displacement agent with specific weight less than the specific weight of the formation water to the injector and extraction of the product from the producer. A heat medium with a temperature of 80°C is used as the displacement agent. Before operation of the wells surveys are made to determine water-bearing zones adjoining the producer. Thereafter the horizontal part in a perforated interval of the operated well adjoining the water-bearing zones is filled in sequence from the botttomhole to the mouth with a waterproofing sealant destroyable when its temperature stability is exceeded, and the above selected temperature stability is lower than the heat medium temperature. Upon withhold of the waterproofing sealant the wells are brought to operation in a normal mode. As the formation is heated and the waterproofing sealant is destroyed, extraction of the fluid increases.

EFFECT: reducing period of high water-cut in operation of the producer, reducing energy costs, increasing the oil recovery factor for the deposit.

1 ex, 1 dwg