A multi-component thermal fluid generation system for petroleum thermal recovery using petroleum coke as fuel

Abstract

The invention discloses a petroleum heat extraction multiple thermal fluid generation system adopting petroleum coke as fuel, and belongs to the technical field of petroleum heat extraction. The petroleum heat extraction multiple thermal fluid generation system comprises a slurrying device, a stirring tank, a high-pressure pump, a combustor, a high-temperature separator and a slag storage tank, and the combustor is overall vertically arranged, comprises a combusting chamber and a vaporizing chamber formed in the lower part of the combusting chamber, and further comprises an atomization spray gun, a cyclone and an auxiliary ignition device which are arranged at the top of the combusting chamber. The top swirling combustor cooperates with the auxiliary ignition device, thus water-coke slurryand a combustion improver are mixed and then subjected to high-pressure swirling spray combustion, it is ensured that the water-coke slurry and the combustion improver are sufficiently mixed and atomized, swirl combustion is formed by the cyclone to enhance homogeneous charge compression ignition of the water-coke slurry, the homogeneous charge compression ignition time is prolonged, sufficient combustion of the water-coke slurry is ensured, coke embers and the carbon content of fly ash are reduced, thus the petroleum coke becomes possible for serving as the fuel of a multiple thermal fluid generator, and the cost of multiple thermal fluid thickened oil miming is lowered.

Description

technical field [0001] The invention relates to a multi-component thermal fluid generation system for petroleum thermal recovery, more specifically, a multi-component thermal fluid generation system for petroleum thermal recovery with petroleum coke as fuel. Background technique [0002] Heavy oil production in oilfields is mainly based on steam huff and puff and steam flooding, but there are problems such as small heat sweep range, poor recovery effect, and large heat loss. Therefore, in the later stage of huff and puff development, gas-assisted steam injection such as nitrogen / carbon dioxide is generally used to improve the thermal recovery effect, which is the feature and advantage of the multi-component thermal fluid oil recovery technology. Multi-component thermal fluid thermal recovery technology is a comprehensive oil recovery method that efficiently utilizes the synergistic effects of nitrogen, carbon dioxide, water vapor and combustion heat. Through heating and gas ...

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Problems solved by technology

However, this patent application does not provide a specific burner structure setting, and the actual combustion efficiency remains to be verified

From the perspective of practical application, there is no practical application of heavy oil thermal recovery technology using petroleum coke as fuel at present, which also confirms from the side that petroleum coke is used instead of natural and diesel oil as the fuel of multi-element thermal fluid generator. Technical difficulty, the stability of the water coke slurry burner to fully atomize and burn the water coke slurry is also the difficulty of restricting the application of petroleum coke as a fuel in the multi-component thermal fluid generator

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