HEATING SYSTEM FOR UNDERGROUND FORMATION AND METHOD OF HEATING UNDERGROUND FORMATION USING HEATING SYSTEM Russian patent published in 2013 - IPC E21B43/24 

FIELD: oil and gas industry.

SUBSTANCE: heating system contains three, basically, u-shaped heaters. The first end parts of heaters are electrically connected to single three-phase transformer with Y-connection of phases, and the second end parts of heaters are electrically connected between themselves and/or with the ground. Note that three heaters enter the formation through the first common borehole and leave the formation through the second common borehole so that magnetic fields of three heaters in common boreholes are partially suppressed. Method provides the use of above device for underground formation heating.

EFFECT: heaters provide the possibility to maintain increased pressure in heated part of underground formation, at which the added formation fluid has minimum number of compounds with carbon number value more than 8 to provide the conditions of pyrolysis of polynuclear hydrocarbon compounds and their quality control as well as prevention of formation falling in the course of its thermal treatment.

20 cl, 8 dwg