Mineral insulated heating cable used in ultra-deep ultra-heavy oil wells

Carbonate reservoirs in the Tahe Oilfield are ultra-deep and ultra-heavy oil reservoirs. Oils stop flowing at the depth of 2000-3000 m. The conventional heating method to reduce viscosity with electric heating rods is restricted by heating depth, and fails at the depth of 2000 m. Mineral insulated cable uses continuous and high qua-lity copper wire as heat conductor and special mineral material as insulation. So, it is more effective and lighter, and can work in wells deeper than 3000 m. The mineral insulated heating cable was applied in well TH12177CH in the Tahe Oil Field. Well head temperature rose by 38℃ and the light oil saving rate increased to 56.4%.