Oxygen-enriched combustion-supporting thick oil well gas injection system and gas injection method

An oxygen-enriched combustion-supporting and oxygen-enriched air technology, applied in earth-moving drilling, wellbore/well components, production fluids, etc. The effect of equipment life, reduction of heat loss, and expansion of heating range

Active Publication Date: 2018-02-16
WUHAN YUANFANG SCI & TECH CO LTD OF CHINA SANJIANG SPACE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] 4. In the existing PSA pressure swing adsorption oxygen-enrichment process, since the air compressor and PSA oxygen generator are connected in series, the amount of oxygen-enriched air fluctuates greatly with the change of oxygen concentration, and the total amount of gas injection cannot meet the high load operation, so the gas injection efficiency will be reduced

Method used

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  • Oxygen-enriched combustion-supporting thick oil well gas injection system and gas injection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 1) Inject light oil / diesel oil into the light oil chamber of the light / heavy oil integrated self-heating oil tank, inject the heavy oil produced from the oil well (with a viscosity of 3000mpa·s at room temperature) into the heavy oil in the light / heavy oil integrated self-heating oil tank cavity;

[0043] 2) Open the air flow solenoid valve and the oxygen flow solenoid valve, start the air compressor, pressure swing adsorption oxygen generator and water supply system, so that the prepared oxygen-enriched air is pressurized by the high-pressure booster and then sent to the burner, and the water Enter the burner through the water supply system; when the system is ignited, switch the switch valve to the light oil / diesel pipeline, inject the light oil / diesel into the burner through the high-pressure oil pump and mix it with 25% oxygen-enriched air for combustion, and mix with water After contact heat exchange and gasification, the multivariate thermal fluid (that is, the mi...

Embodiment 2

[0047] 1) Inject light oil / diesel oil into the light oil chamber of the light / heavy oil integrated self-heating oil tank, inject No. 180 heavy oil into the heavy oil chamber of the light / heavy oil integrated self-heating oil tank;

[0048] 2) Open the air flow solenoid valve and the oxygen flow solenoid valve, start the air compressor, pressure swing adsorption oxygen generator and water supply system, so that the prepared oxygen-enriched air is pressurized by the high-pressure booster and then sent to the burner, and the water Enter the burner through the water supply system; when the system is ignited, switch the switching valve to the light oil / diesel pipeline, inject the light oil / diesel into the burner through the high-pressure oil pump and mix it with oxygen-enriched air with 28% oxygen content for combustion, and mix with water After contact heat exchange and gasification, the multivariate thermal fluid (that is, the mixture of flue gas, water vapor and water) produced i...

Embodiment 3

[0052] 1) Inject light oil / diesel oil into the light oil cavity of the light / heavy oil integrated self-heating oil tank, inject the heavy oil produced from the heavy oil well (12000mpa·s at room temperature) into the light / heavy oil integrated self-heating oil tank in the heavy oil chamber;

[0053] 2) Open the air flow solenoid valve and the oxygen flow solenoid valve, start the air compressor, pressure swing adsorption oxygen generator and water supply system, so that the prepared oxygen-enriched air is pressurized by the high-pressure booster and then sent to the burner, and the water Enter the burner through the water supply system; when the system is ignited, switch the switch valve to the light oil / diesel pipeline, inject the light oil / diesel into the burner through the high-pressure oil pump and mix it with 30% oxygen-enriched air for combustion, and mix with water After contact heat exchange and gasification, the multivariate thermal fluid (that is, the mixture of flue...

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Abstract

The invention discloses an oxygen-enriched combustion-supporting thick oil well gas injection system and a gas injection method. The oxygen-enriched combustion-supporting thick oil well gas injectionsystem comprises a fuel oil pipeline, an oxygen-enriched air pipeline, a combustor and a water supplying system; the fuel oil pipeline comprises a light oil and heavy oil integrated self-heating oil box, a switching valve and a high-pressure oil pump; and the oxygen-enriched air pipeline comprises a gas mixer, an air compressor, a pressure swing adsorption oxygen generator, an oxygen flow electromagnetic valve, an air flow electromagnetic valve and an oxygen concentration detector. According to the oxygen-enriched combustion-supporting thick oil well gas injection system, heavy oil, diesel, light oil and thick oil are used as fuel to be combusted with prepared oxygen-enriched air, in oxygen-enriched air preparation of the oxygen-enriched combustion-supporting thick oil well gas injection system, high-load operation of the gas injection amount under different oxygen-enriched concentrations can be achieved, therefore, the gas injection efficiency of the system can be improved significantly, accordingly the combustion efficiency is improved, the enthalpy value is increased, carbon deposition of the combustor can be reduced, the service life of the equipment is prolonged by a large margin, and the operation cost is reduced greatly.

Description

technical field [0001] The invention belongs to the technical field of oil recovery technology, and in particular relates to a gas injection system and a gas injection method for an oxygen-enriched combustion-supporting heavy oil well. Background technique [0002] Injecting saturated water vapor into oil layers for thermal recovery of heavy oil is one of the methods commonly used in countries all over the world. Injecting carbon dioxide, nitrogen, etc. Achieve certain oil recovery effect and economic benefits. The composite heat carrier generated by the high-temperature and high-pressure composite heat carrier generator through closed combustion contains high-temperature nitrogen, carbon dioxide and water vapor, and carries combustion heat. The thermal efficiency of the composite heat carrier generator of this technology is 95%, and all of them are injected through the heat injection pipeline. Reservoir, comprehensively enhance oil recovery and single well productivity, ze...

Claims

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Application Information

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IPC IPC(8): E21B43/243
CPCE21B43/243
Inventor 张全来周吉成杜武刘超邹云
Owner WUHAN YUANFANG SCI & TECH CO LTD OF CHINA SANJIANG SPACE GRP
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