METHOD FOR DEVELOPMENT OF DEPOSIT OF HEAVY OIL OR BITUMEN WITH IMPLEMENTATION OF DOUBLE WELL HEAD HORIZONTAL WELLS Russian patent published in 2011 - IPC E21B43/24 

FIELD: oil and gas production.

SUBSTANCE: method consists in construction of double well head upper pressure and lower producing wells with horizontal sections positioned one above another and in heat carrier pumping. Superheated steam mixed with fuel combustion products is used a heat carrier pumped through one of the well heads of a pressure string. Also, moisture condensed on internal surface of the pressure well is withdrawn through another well head. With decrease of collecting properties and/or reduction of summary withdrawal of reservoir production more, than twice for a period not over three months one of the well heads of the producing well is sealed, and oil-sealer emulsion is pumped at volume not less, than twice exceeding volume of the horizontal borehole of the producing string. Upon process conditioning heat carrier pumping and production withdrawal are carried out under a normal mode. Pressure of pumping is chosen depending on penetrability of the payout reservoir and volume of pumped heat carrier is determined depending on efficient oil-saturated thickness of the payout reservoir. Also, there is created a steam chamber for payout reservoir heating. Heated heavy oil or bitumen are withdrawn by means of immersed pumps. Heated heavy oil or bitumen are further supplied from the payout reservoir into a slit filter of a horizontal section of the double well head producing well.

EFFECT: reduced financial and material expenditures at implementation of method of thermal-gas-chemical influence on oil reservoir in interval of horizontal section.

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