FR2906879A1 - Installation for producing a mixture of nitrogen and carbon dioxide for injection into a subterranean hydrocarbon reservoir comprises an air separator, an oxygen consumption unit, a carbon dioxide separator and a mixer - Google Patents

Installation for producing a mixture of nitrogen and carbon dioxide for injection into a subterranean hydrocarbon reservoir comprises an air separator, an oxygen consumption unit, a carbon dioxide separator and a mixer Download PDF

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Publication number
FR2906879A1
FR2906879A1 FR0753083A FR0753083A FR2906879A1 FR 2906879 A1 FR2906879 A1 FR 2906879A1 FR 0753083 A FR0753083 A FR 0753083A FR 0753083 A FR0753083 A FR 0753083A FR 2906879 A1 FR2906879 A1 FR 2906879A1
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France
Prior art keywords
carbon dioxide
nitrogen
oxygen
unit
mixture
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Withdrawn
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FR0753083A
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French (fr)
Inventor
Alain Guillard
Jean Francois Ducholet
Francois Fuentes
Jean Marc Tsevery
Frederic Datchary
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Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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Priority to FR0753083A priority Critical patent/FR2906879A1/en
Publication of FR2906879A1 publication Critical patent/FR2906879A1/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04521—Coupling of the air fractionation unit to an air gas-consuming unit, so-called integrated processes
    • F25J3/04527—Integration with an oxygen consuming unit, e.g. glass facility, waste incineration or oxygen based processes in general
    • F25J3/04533—Integration with an oxygen consuming unit, e.g. glass facility, waste incineration or oxygen based processes in general for the direct combustion of fuels in a power plant, so-called "oxyfuel combustion"
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04521—Coupling of the air fractionation unit to an air gas-consuming unit, so-called integrated processes
    • F25J3/04563—Integration with a nitrogen consuming unit, e.g. for purging, inerting, cooling or heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2260/00—Coupling of processes or apparatus to other units; Integrated schemes
    • F25J2260/80—Integration in an installation using carbon dioxide, e.g. for EOR, sequestration, refrigeration etc.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Carbon And Carbon Compounds (AREA)

Abstract

Installation for producing a mixture of nitrogen and carbon dioxide for injection into a subterranean reservoir to facilitate hydrocarbon production comprises an air separation unit producing oxygen and nitrogen, an oxygen consumption unit, a carbon dioxide separation and/or purification unit and a device for mixing the nitrogen and carbon dioxide. An independent claim is also included for producing a mixture of nitrogen and carbon dioxide for injection into a subterranean reservoir to facilitate hydrocarbon production by separating air into oxygen and nitrogen, passing the oxygen to an oxygen consumption unit, separating and/or purifying carbon dioxide and mixing the nitrogen and carbon dioxide.

Description

1 La présente invention est relative à une installation de production d'unThe present invention relates to a production plant of a

gaz sous haute pression chargé en azote et en dioxyde de carbone. La nécessité de traiter dans un avenir plus ou moins lointain le dioxyde de carbone en sortie des unités de génération d'énergie électrique implique, dans le cas où une unité de postcombustion est utilisée, une unité de séparation d'air et une unité de séparation et purification de dioxyde de carbone. Celui-ci, une fois séparé et purifié, pourra être utilisé en étant envoyé, après compression sous très haute pression, via des tuyaux pour être envoyé dans des puits de pétrole ou des champs de gaz naturel pour faciliter io l'extraction des hydrocarbures (EOR). L'azote sous très haute pression est également utilisé à cet effet. Il est nécessaire pour que la technologie d'oxycombustion s'impose par rapport à d'autres technologies comme le lavage aux amines que la production d'oxygène et la séparation/purification du CO2 et sa compression ait une 15 consommation électrique minimale. L'utilisation d'oxygène impur permet d'aller dans ce sens. Selon un objet de l'invention, il est prévu une installation de production d'un mélange d'azote et de dioxyde de carbone comprenant une unité de séparation d'air produisant de l'oxygène et de l'azote et une unité de 20 séparation et/ou de purification de dioxyde de carbone en aval d'une unité consommatrice d'oxygène utilisant cet oxygène, et des moyens pour mélanger l'azote et le dioxyde de carbone et des moyens pour envoyer le mélange à un réservoir souterrain contenant des hydrocarbures pour en faciliter l'extraction. L'installation peut également comprendre : 25 - un compresseur d'azote en amont des moyens pour mélanger l'azote et le dioxyde de carbone ; - un compresseur de mélange en aval des moyens pour mélanger l'azote et le dioxyde de carbone. L'unité consommatrice d'oxygène peut être une unité d'oxycombustion.  high pressure gas loaded with nitrogen and carbon dioxide. The need to treat in the more or less distant future the carbon dioxide at the output of the electric power generating units involves, in the case where an afterburner unit is used, an air separation unit and a separation unit. and purification of carbon dioxide. The latter, once separated and purified, can be used by being sent, after compression under very high pressure, via pipes to be sent into oil wells or fields of natural gas to facilitate the extraction of hydrocarbons ( EOR). Nitrogen under very high pressure is also used for this purpose. It is necessary for the oxyfuel combustion technology to be required over other technologies such as amine scrubbing as oxygen production and CO2 separation / purification and its compression has a minimum electrical consumption. The use of impure oxygen makes it possible to go in this direction. According to one object of the invention, there is provided a plant for producing a mixture of nitrogen and carbon dioxide comprising an air separation unit producing oxygen and nitrogen and a unit of 20 separation and / or purification of carbon dioxide downstream from an oxygen consuming unit using this oxygen, and means for mixing nitrogen and carbon dioxide and means for sending the mixture to an underground reservoir containing hydrocarbons to facilitate extraction. The plant may also include: a nitrogen compressor upstream of the means for mixing nitrogen and carbon dioxide; - A mixing compressor downstream of the means for mixing nitrogen and carbon dioxide. The oxygen consuming unit may be an oxycombustion unit.

30 Selon un autre objet de l'invention, il est prévu un procédé de production d'un mélange d'azote et de dioxyde de carbone dans lequel on sépare de l'air dans une unité de séparation d'air pour produire de l'oxygène et de l'azote et on sépare et/ou épure du dioxyde de carbone dans une unité de séparation 2906879 2 et/ou de purification de dioxyde de carbone, on envoie de l'oxygène de l'unité de séparation d'air à une unité consommatrice d'oxygène, on envoie du fluide contenant du dioxyde de carbone de l'unité consommatrice d'oxygène à l'unité de séparation et/ou de purification de dioxyde de carbone, on mélange de 5 l'azote et du dioxyde de carbone et on envoie le mélange à un réservoir souterrain contenant des hydrocarbures pour en faciliter l'extraction. Selon d'autres aspects facultatifs : - l'oxygène a une pureté inférieure à 97 % mol ; - l'azote est produit à une pression inférieure à 6 bars ; io - l'azote est produit à une pression supérieure à 6 bars ; - on comprime l'azote avant de le mélanger avec le dioxyde de carbone ; - on comprime le mélange d'azote et de dioxyde de carbone. L'invention sera décrite en plus de détail en se référant aux figures, qui représentent l'unité de séparation d'air et l'unité de séparation de dioxyde de 15 carbone intégrées. Dans la Figure 1, de l'air 1 est envoyé à un appareil de séparation d'air par distillation cryogénique 3. Celui-ci produit de l'oxygène 5 à une pureté inférieure à 97 % mol. et de l'azote 15. L'oxygène 5 est envoyé au moins en partie à une unité consommatrice 20 d'oxygène 7, telle qu'un appareil d'oxycombustion. L'azote 15 est produit à basse pression (inférieure à 6 bars) et est comprimé dans le compresseur 17 pour former un débit 19 à la même pression que le débit de dioxyde de carbone 13. Cette unité 7 produit des gaz résiduels riches en dioxyde de carbone 9 25 qui sont envoyés à une unité de séparation de dioxyde de carbone 11. Un débit gazeux de dioxyde de carbone 13 est produit et mélangé avec l'azote 15. Ensuite le mélange 21 est comprimé à très haute pression dans un compresseur 23 et envoyé à un réservoir souterrain 25 pour faciliter l'extraction des hydrocarbures.According to another object of the invention, there is provided a method for producing a mixture of nitrogen and carbon dioxide in which air is separated in an air separation unit to produce air. oxygen and nitrogen and carbon dioxide is separated and / or purified in a separation unit 2906879 2 and / or purification of carbon dioxide, oxygen is sent from the air separation unit to an oxygen consuming unit is supplied with carbon dioxide containing fluid from the oxygen consuming unit to the carbon dioxide separation and / or purification unit, nitrogen and dioxide are mixed together; carbon and the mixture is sent to an underground reservoir containing hydrocarbons to facilitate extraction. According to other optional aspects: the oxygen has a purity lower than 97 mol%; the nitrogen is produced at a pressure of less than 6 bar; the nitrogen is produced at a pressure higher than 6 bar; the nitrogen is compressed before mixing with the carbon dioxide; the mixture of nitrogen and carbon dioxide is compressed. The invention will be described in more detail with reference to the figures which show the integrated air separation unit and carbon dioxide separation unit. In Figure 1, air 1 is sent to an air separation apparatus by cryogenic distillation 3. This produces oxygen at a purity of less than 97 mol%. The oxygen is sent at least in part to an oxygen consuming unit 7, such as an oxy-fuel combustion apparatus. The nitrogen is produced at low pressure (less than 6 bar) and is compressed in the compressor 17 to form a flow 19 at the same pressure as the flow of carbon dioxide 13. This unit 7 produces residual gases rich in dioxide carbon dioxide 9 is produced and mixed with the nitrogen 15. Then the mixture 21 is compressed at a very high pressure in a compressor 23 and sent to an underground reservoir 25 to facilitate hydrocarbon extraction.

30 Dans la Figure 2, de l'air 1 est envoyé à un appareil de séparation d'air par distillation cryogénique 3. Celui-ci produit de l'oxygène 5 à une pureté inférieure à 97 % mol. et de l'azote 15.In Figure 2, air 1 is supplied to an air separation apparatus by cryogenic distillation 3. This produces oxygen at a purity of less than 97 mol%. and nitrogen 15.

2906879 3 L'oxygène 5 est envoyé au moins en partie à une unité consommatrice d'oxygène 7, telle qu'un appareil d'oxycombustion. L'azote 15 est produit à une pression supérieure à 6 bars, de préférence sensiblement égale à la pression de production du débit de dioxyde de carbone 13.The oxygen is sent at least in part to an oxygen consuming unit 7, such as an oxyfuel combustion apparatus. The nitrogen is produced at a pressure higher than 6 bar, preferably substantially equal to the production pressure of the carbon dioxide flow 13.

5 Cette unité 7 produit des gaz résiduels riche en dioxyde de carbone 9 qui sont envoyés à une unité de séparation de dioxyde de carbone 11. Un débit gazeux de dioxyde de carbone 13 est produit et mélangé avec l'azote 15. Ensuite le mélange 21 est comprimé à très haute pression dans un compresseur 23 et envoyé à un réservoir souterrain 25 pour faciliter l'extraction io des hydrocarbures. Pour les deux figures, le mélange 21 peut avoir des caractéristiques allant de quelque pourcent d'azote dans le flux de dioxyde de carbone, jusqu'à quelque pourcent de dioxyde de carbone dans un flux d'azote. Les quantités mises à disposition par le site pour être utilisées pour 15 faciliter l'extraction des hydrocarbures peuvent être ainsi pratiquement doublées voir triplées.This unit 7 produces carbon dioxide-rich residual gases 9 which are sent to a carbon dioxide separation unit 11. A carbon dioxide gas flow 13 is produced and mixed with the nitrogen 15. Then the mixture 21 is compressed at a very high pressure in a compressor 23 and sent to an underground reservoir 25 to facilitate the extraction of hydrocarbons. For both figures, the mixture 21 can have characteristics ranging from about one percent nitrogen in the carbon dioxide stream to up to a few percent carbon dioxide in a nitrogen stream. The quantities made available by the site to be used to facilitate the extraction of hydrocarbons can thus be practically doubled or even tripled.

Claims (10)

REVENDICATIONS 1. Installation de production d'un mélange d'azote et de dioxyde de carbone comprenant une unité de séparation d'air (3) produisant de l'oxygène (5) et de l'azote (15) et une unité de séparation et/ou de purification de dioxyde de carbone (11) en aval d'une unité consommatrice d'oxygène (7) utilisant cet oxygène, et des moyens pour mélanger l'azote et le dioxyde de carbone (13) et des moyens pour envoyer le mélange (21) à un réservoir souterrain (25) contenant des hydrocarbures pour en faciliter l'extraction. i0  A plant for producing a mixture of nitrogen and carbon dioxide comprising an air separation unit (3) producing oxygen (5) and nitrogen (15) and a separation unit and / or purifying carbon dioxide (11) downstream from an oxygen consuming unit (7) using this oxygen, and means for mixing nitrogen and carbon dioxide (13) and means for sending the mixing (21) with an underground reservoir (25) containing hydrocarbons to facilitate extraction. i0 2. Installation selon la revendication 1 comprenant un compresseur d'azote (17) en amont des moyens pour mélanger l'azote (15) et le dioxyde de carbone (13). 15  2. Installation according to claim 1 comprising a nitrogen compressor (17) upstream of the means for mixing nitrogen (15) and carbon dioxide (13). 15 3. Installation selon la revendication 2 comprenant un compresseur (23) de mélange en aval des moyens pour mélanger l'azote (15) et le dioxyde de carbone (13).  3. Installation according to claim 2 comprising a compressor (23) mixing downstream means for mixing the nitrogen (15) and the carbon dioxide (13). 4. Installation dans laquelle l'unité consommatrice d'oxygène (7) est 20 une unité d'oxycombustion.  4. Installation in which the oxygen consuming unit (7) is an oxy-fuel unit. 5. Procédé de production d'un mélange d'azote et de dioxyde de carbone dans lequel on sépare de l'air dans une unité de séparation d'air (3) pour produire de l'oxygène (5) et de l'azote et (15) on sépare et/ou épure du 25 dioxyde de carbone dans une unité de séparation et/ou de purification de dioxyde de carbone (11), on envoie de l'oxygène de l'unité de séparation d'air à une unité consommatrice d'oxygène (7), on envoie du fluide (9) contenant du dioxyde de carbone de l'unité consommatrice d'oxygène à l'unité de séparation et/ou de purification de dioxyde de carbone, on mélange de l'azote et du 30 dioxyde de carbone (13) et on envoie le mélange à un réservoir souterrain (25) contenant des hydrocarbures pour en faciliter l'extraction. 2906879 5  A process for producing a mixture of nitrogen and carbon dioxide in which air is separated in an air separation unit (3) to produce oxygen (5) and nitrogen and (15) separating and / or purifying carbon dioxide in a carbon dioxide separation and / or purification unit (11), oxygen is sent from the air separation unit to a oxygen-consuming unit (7), fluid (9) containing carbon dioxide from the oxygen-consuming unit is sent to the carbon dioxide separation and / or purification unit, mixing of the nitrogen and carbon dioxide (13) and the mixture is sent to an underground tank (25) containing hydrocarbons to facilitate extraction. 2906879 5 6. Procédé selon la revendication 5 dans lequel l'oxygène (5) a une pureté inférieure à 97 % mol.  The process of claim 5 wherein the oxygen (5) has a purity of less than 97 mol%. 7. Procédé selon la revendication 5 ou 6 dans lequel l'azote (15) est 5 produit à une pression inférieure à 6 bars.  7. The process of claim 5 or 6 wherein the nitrogen (15) is produced at a pressure of less than 6 bar. 8. Procédé selon la revendication 5 ou 6 dans lequel l'azote (15) est produit à une pression supérieure à 6 bars.  The process of claim 5 or 6 wherein the nitrogen (15) is produced at a pressure above 6 bar. 9. Procédé selon la revendication 6 ou 7 dans lequel on comprime l'azote (15) avant de le mélanger avec le dioxyde de carbone (13).  9. The method of claim 6 or 7 wherein the nitrogen (15) is compressed before mixing with the carbon dioxide (13). 10. Procédé selon la revendication 6, 7 ou 8 dans lequel on comprime le mélange (21) d'azote (15) et de dioxyde de carbone (13).15  The method of claim 6, 7 or 8 wherein the mixture (21) of nitrogen (15) and carbon dioxide (13) is compressed.
FR0753083A 2007-02-06 2007-02-06 Installation for producing a mixture of nitrogen and carbon dioxide for injection into a subterranean hydrocarbon reservoir comprises an air separator, an oxygen consumption unit, a carbon dioxide separator and a mixer Withdrawn FR2906879A1 (en)

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