DEVELOPMENT METHOD OF HIGH-VISCOUS OIL DEPOSIT Russian patent published in 2010 - IPC E21B43/24 

FIELD: oil and gas industry.

SUBSTANCE: method involves pumping of oxidiser through injection wells, arrangement of in-situ combustion and withdrawal of products through production wells. As production wells there used are wells with horizontal shaft at bottom part of formation, and as injection wells - vertical wells the bottomholes of which are located within the limits of the same formation under horizontal shaft of production well. Injection well between each other and bottomhole of those wells above horizontal shaft are located at the distance excluding the penetration of fuel or oxidiser to other wells. To injection wells located above horizontal shaft there pumped next but one and parallel to oxidiser is fuel mixed with water before it is pumped to formation. Fuel water amount is increased at temperature increase of removed products above the specified one, and decreased at temperature decrease of removed products below the specified one.

EFFECT: increasing method efficiency owing to possibility of enlargement of steam chamber and combustion temperature control in this chamber.

2 dwg