DEVELOPMENT METHOD OF OIL DEPOSIT BY USING THERMAL ACTION ON FORMATION Russian patent published in 2010 - IPC E21B43/243 

FIELD: oil and gas industry.

SUBSTANCE: method involves drilling and arrangement of vertical and horizontal wells so that bottomhole of vertical well is located above bottomhole of horizontal well at design distance along vertical of 3 to 7 m. Warming-up area is created and its movement along the formation is provided parallel to the bore of horizontal well owing to pumping of displacement agent to vertical well. Liquid extraction is arranged by means of horizontal well. According to invention, as agent there used is combustible-oxidation mixture - COM, for example mixture of carbamide, nitric acid, acetic acid, water and ammonium nitrate, which burns under influence of temperature or initiating agent of burning - IAB, for example the compound containing aluminium and chrome oxide; at that, prior to production there supplied is COM and IAB by mixing prior to their being pumped to formation via vertical and horizontal wells in order to ignite and warm-up the inter-well zone of up to 100-200°C, depending on COM and IAB type, and establishment of hydrodynamic connection between wells; after that horizontal well is involved in liquid production, and COM and IAB is continued to be supplied to vertical well in order to maintain burning and warming-up of deposit to temperature of independent burning of COM - to 250-350°C; after that IAB supply is stopped and COM pumping is continued to maintain and move the burning process parallel to the bore of horizontal well.

EFFECT: increasing development efficiency of oil or bitumen deposit owing to using thermal action on oil bed, and increasing oil extraction coefficient owing to using environmentally safe development procedure.

1 ex, 1 dwg