A supercritical multi-component thermal fluid generator that can be directly used for thermal recovery of heavy oil

Abstract

The invention relates to a supercritical multi-element thermal fluid generating device which can be directly used for thermal recovery of heavy oil, comprising a generator end cover, a mixing cylinder and a reactor wall. The reactor end cover is provided with a water-cooled end cover, and cooling water is injected to protect the reactor end cover from overheating, and a cooling water channel is also arranged on the reactor end cover to protect the flame monitor. A nozzle platform is arranged at the bottom of the end cover of the reactor, and an oxidant spiral nozzle is opened on the nozzle platform, and the atomizing nozzle is threadedly connected to ensure that the fuel and the oxidant are evenly mixed. There is also a secondary fuel channel in the combustion chamber, which can directly inject crude oil into the combustion chamber, avoiding the problem of coking and carbon deposition during fuel preheating. The water in the annular cooling channel flows downward to cool the combustion chamber, and then enters the cooling mixing channel, where it is mixed with the reaction fluid flowing out through the outlet hole group of the mixing cylinder to achieve the temperature control goal. The constriction structure in the middle of the combustion chamber, the constriction structure at the bottom of the combustion chamber and the outlet hole group of the mixing cylinder can achieve the purpose of pressure control.

Description

technical field [0001] The invention belongs to the technical field of energy exploitation, and particularly relates to a supercritical multi-element thermal fluid generating device which can be directly used for thermal recovery of heavy oil. Background technique [0002] At present, the main recovery methods of heavy oil oilfields are mainly thermal recovery methods such as steam huff and puff, steam flooding, and steam-assisted gravity drainage. This thermal recovery method mainly injects the hot steam generated by the ground steam injection boiler into the formation to increase the formation temperature, reduce the viscosity of the heavy oil, increase the fluidity of the heavy oil, and achieve the purpose of improving the recovery factor of the heavy oil. Conventional steam injection technology is very mature, but the problems such as environmental pollution, large heat loss, limited applicable reservoir depth, and too large device volume cannot be applied to offshore he...

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Problems solved by technology

Use the secondary fuel port to inject crude oil or other cold temperature fuels with higher flow and concentration, which not only ensures the power of the combustion chamber, but also solves the problem of coking and carbon deposition that may be encountered during the preheating process

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