Steam-flue gas mixing fluid generation method for thickened oil thermal recovery

Abstract

A steam-flue gas mixing fluid generation method for thickened oil thermal recovery belongs to the technical field of thickened oil thermal recovery and boiler equipment. A generation system comprises a boiler, a transition gas flue and a mixing chamber. The steam-flue gas mixing fluid generation method comprises the following steps of: feeding pressurized gas or liquid fuel and air into the hearth of the boiler, mixing and burning in the hearth to generate high-temperature and high-pressure flue gas, and feeding the flue gas into the mixing chamber through the transition gas flue; spraying purified water into the mixing chamber through an atomization plant to form tiny liquid drops, mixing the tiny liquid drops with the high-temperature and high-pressure flue gas in the mixing chamber, heating the mixture by the flue gas to turn into water vapor after being vaporized, and further generating the high-temperature and high-pressure steam-flue gas mixing fluid; and finally, leading the high-temperature and high-pressure steam-flue gas mixing fluid out to a steam injection pipeline. The steam-flue gas mixing fluid generation method has the advantages of reducing flue gas purification and compression links, effectively saving investment and running costs and water resources and obviously reducing the cost of water treatment.

Description

technical field [0001] The invention relates to a method for producing high-temperature and high-pressure steam-flue gas mixed fluid, and belongs to the technical field of heavy oil thermal recovery and boiler equipment. Background technique [0002] In recent years, as the effect of steam huff and puff in thermal recovery of heavy oil has deteriorated year by year, heavy oil fields have been in the transition period from steam huff and puff to other production methods. Among various replacement technologies, flue gas and steam mixed injection huff and puff is the most promising method. Existing flue gas injection test results show that the use of the overlay effect of flue gas can improve the production degree of the upper oil layer; use of the compressibility of flue gas can provide oil displacement power for oil well production; use of CO 2 The carboxylation of the oil can reduce the viscosity of crude oil; use the low-temperature oxidation and coking of oxygen in the fl...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of complex flue gas dehydration, purification, pressurization and other process equipment, huge investment, and difficulty in large-scale application in the existing flue gas and steam mixing method, and propose a production method that can be directly used for heavy oil Generation method of high temperature and high pressure steam-flue gas mixed fluid in thermal recovery

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