DEVELOPMENT METHOD OF HIGH-VISCOSITY OIL DEPOSIT USING METHOD OF STEAM GRAVITATIONAL ACTION ON FORMATION Russian patent published in 2012 - IPC E21B43/24 E21B47/06 

FIELD: oil and gas industry.

SUBSTANCE: development method of high-viscosity oil deposit using the method of steam gravitational action on the formation involves drilling and arrangement of injection and production wells, adjustable pumping of steam to injection well for warming-up of productive formation throughout the length of its horizontal shaft and lifting of fluid from production well. At that, injection well is drilled and arranged with horizontal shaft with diameter and length which is smaller than that of production well, and at least one additional similar injection well is provided for the above well. At that, horizontal shafts of injection wells are arranged at the distance of not less than three metres above horizontal shaft of production well. Steam pumping modes in each of the injection wells are changed based on the temperature survey results of horizontal shaft of production well for uniform formation warming-up.

EFFECT: improving oil recovery.

1 dwg, 1 ex