METHOD FOR EXTRACTING HYDROCARBON DEPOSITS Russian patent published in 2006 - IPC E21B43/24 

FIELD: oil and gas industry, in particular, technology for extraction of oil and gas deposits, namely, methods for extracting viscous oil with use of heat in complex with drilling of horizontal and vertical wells.

SUBSTANCE: in accordance to method for extracting hydrocarbons, several horizontal wells are drilled. The latter are positioned in groups of two in the same apsidal plane. Then vertical wells are drilled and a horizontal collector well. Working agent is fed in. Hydrocarbons are extracted. Pit-faces of horizontal and vertical wells are positioned near horizontal part of collector-well or intersect with it. Working agent is fed via horizontal wells and collector well until hydrocarbon enters moving state. Horizontal shafts of horizontal wells are drilled descending to collector-well. After that extraction of hydrocarbons is performed via vertical wells.

EFFECT: increased efficiency of extraction due to increased coverage of bed by process of thermal influence, decreased capital investments and operation costs, increased coefficient of extraction of hydrocarbons from bed and increased well operation coefficient.

3 cl, 2 ex, 3 dwg