This invention relates to a method for using water-coke slurry as fuel of steam injection boiler for heat-exploiting dense petroleum. The method uses petroleum by product water-coke slurry as the fuel, and can accelerate the igniting speed of water-coke slurry by rational combination of two liquefied petroleum gas buners, three petroleum buners and four water-coke slurry buners. Therefore, the water-coke slurry has a stable combustion effect, and has high combustion efficiency as well as thermal efficiency in the steam injection boiler. The method can use water-coke slurry as a substitute for crude petroleum as the fuel for steam injection boiler, and ensure a high thermal efficiency of the steam injection boiler with combustion efficiency higher than 98% thus can save crude petroleum. |