EP0131499B1 - Method for the oxidation of hydrocarbonaceous subterranean sedimentary formations - Google Patents
Method for the oxidation of hydrocarbonaceous subterranean sedimentary formations Download PDFInfo
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- EP0131499B1 EP0131499B1 EP84401286A EP84401286A EP0131499B1 EP 0131499 B1 EP0131499 B1 EP 0131499B1 EP 84401286 A EP84401286 A EP 84401286A EP 84401286 A EP84401286 A EP 84401286A EP 0131499 B1 EP0131499 B1 EP 0131499B1
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- tube
- injection
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- shaft
- gas
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000003647 oxidation Effects 0.000 title claims abstract description 14
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 14
- 230000015572 biosynthetic process Effects 0.000 title claims abstract 13
- 238000005755 formation reaction Methods 0.000 title claims abstract 13
- 238000002347 injection Methods 0.000 claims abstract description 35
- 239000007924 injection Substances 0.000 claims abstract description 35
- 239000007789 gas Substances 0.000 claims abstract description 33
- 230000001590 oxidative effect Effects 0.000 claims abstract description 25
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000001301 oxygen Substances 0.000 claims abstract description 21
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 21
- 239000012530 fluid Substances 0.000 claims abstract description 20
- 238000006243 chemical reaction Methods 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000004880 explosion Methods 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 12
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 4
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 4
- 239000001257 hydrogen Substances 0.000 claims abstract 2
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims abstract 2
- 230000000149 penetrating effect Effects 0.000 claims abstract 2
- 238000007789 sealing Methods 0.000 claims abstract 2
- 239000004215 Carbon black (E152) Substances 0.000 description 10
- 229930195733 hydrocarbon Natural products 0.000 description 10
- 150000002430 hydrocarbons Chemical class 0.000 description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000010926 purge Methods 0.000 description 4
- 206010037544 Purging Diseases 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 241000191291 Abies alba Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B36/00—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
- E21B36/001—Cooling arrangements
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
- E21B43/243—Combustion in situ
Definitions
- the present invention relates to a process for the oxidation of underground sedimentary layers containing hydrocarbonaceous materials, according to which an inert or weakly oxidizing gas is injected in a first step and an oxygen-containing gas in a second step, into at least one well.
- injection starting from the surface and opening into said underground layer so as to cause the partial or total oxidation of said hydrocarbon materials and the flow of these in the form of fluids to at least one production well located at a distance of said injection well and also opening into said underground layer, said injection well being constituted by a first central tube, by a second tube concentric with the first defining a first annular space and by a casing concentric with said second tube defining a second annular space and extending deeper into the underground layer than said first and second tubes.
- Most of the installations for implementing the methods currently used comprise an injection well opening into the underground hydrocarbon layer and at least one production well located at a certain distance from the injection well.
- the injection well comprises a central tube called “tubing" into which the oxygen-containing gas is injected and a tube concentric with said tubing into which is injected, for example, water called reaction water.
- This causes either a modification of the viscosity of the hydrocarbon materials contained in the underground layer (case of petroleum), or their partial oxidation (case of coal), which, in both cases, promotes the flow of said hydrocarbon materials towards the production wells.
- the subject of the invention is a process for the oxidation of underground hydrocarbon layers of the type set out in the preamble to claim 1, which also makes it possible to solve this safety problem and has the advantage of being simple to implement.
- the method according to the invention is characterized in that said first and second tubes 4, 5 open into the lower part of said casing after passing through an annular seal placed between the second tube and the casing, a circulation of cold water being established in the second annular space during the oxygen injection step, in that, during the first step, the inert or slightly oxidizing gas is injected into the first central tube, in that, during of the second step, an oxidizing gas is injected into said central tube and the oxygen concentration of said oxidizing gas is gradually increased, and the reaction fluids injected into the first annular space are penetrated into the underground layer by regularly distributed perforations, formed in the side wall of the lower part of the casing, and in that during the second stage, the pressure is controlled where the reaction takes place in the di your underground sedimentary layers in order to detect an explosion hazard, the injection of reaction fluids being immediately stopped when a pressure variation corresponding to such an explosion hazard has been detected and instead injected into the annular space a safety fluid chosen from nitrogen, carbon dioxide and flooding water, the injection sequence
- the oxygen concentration of the gas injected into the central tube is increased in a proportion of approximately 1% to approximately 30% of oxygen, and in a second stage, the oxygen concentration of said gas is increased to a maximum proportion of between 75% and 99.5%.
- An injection well 1 starts from the free surface 2 of the land in question and opens into the underground layer 3 containing hydrocarbon materials.
- the well 1 comprises a central tube 4, a second tube 5 concentric with the tube 4 and a casing 6 concentric with the tube 5.
- the tube 5 defines with the tube 4 a first annular space 7, and the casing 6 defines with the tube 5 a second annular space 8.
- the casing 6 extends deeper into the underground layer 3 than the tubes 4 and 5.
- the tubes 4 and 5 open into the lower end of the casing 6 after passing through an annular seal 9 says "packer".
- the side wall of the lower part of the casing 6 which is in the underground layer 3 is provided with perforations 10 regularly distributed. Means of injection, regulation and maintenance, called "Christmas tree", placed on the surface 2 are symbolized at 11.
- the central tube 4 is a coiled tube unwound from a coil 12 fixed on the surface on a appropriate device (not shown in the figure); the tube 4 can also be constituted by tubular elements screwed to each other. However, it is preferred to use an unwound coiled tube which has the advantage of being able to be installed and removed quickly.
- This tube 4 is preferably made of stainless or refractory metal.
- an inert or slightly oxidizing gas is injected into the tube 4 so as to purge the bottom of the well, which makes it possible, during the next step, to start the oxidation in an area where the risks of 'explosion are minimal.
- reaction water means water in the form of either liquid, vapor or foam.
- a circulation of cold water is established in the annular space 8 so as to avoid excessive heating of the “packer” 9 (in fact, the packer, which consists of hydrocarbon elements, rubber type, does not support not too high temperatures).
- This circulation of cooling water can advantageously be placed in the annular space 8 using a conventional device (not shown in the figure) of the “Coiled Tubing” or “Snubbing” type (elements tubular).
- the first purging step lasts about a few days
- the first stage of the second oxidation step oxygen concentration of the gas injected into the tube 4 increasing from about 1% to about 30%
- the duration of the second stage of this second stage is approximately 350 days to 700 days.
- the injection of a safety fluid into the annular space 7 is approximately 1 hour.
- the rate of injection of the oxidizing gas into the tube 4 can range from 1000 to 10,000 m 3 / h and that the rate of injection of the reaction water into space annular 7 can be 10 liters per m 3 of oxidizing gas injected into the tube 4.
- the process according to the invention avoids any risk of explosion during the oxidation of underground layers containing hydrocarbonaceous materials, on the one hand thanks to the first purging step, on the other hand thanks to the possibility for monitoring reactions by injecting a safety fluid in the event of an incident.
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- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Processing Of Solid Wastes (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Fire-Extinguishing Compositions (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
Description
La présente invention concerne un procédé d'oxydation de couches sédimentaires souterraines contenant des matières hydrocarbonées selon lequel on injecte, dans une première étape un gaz inerte ou peu oxydant et dans une seconde étape un gaz contenant de l'oxygène, dans au moins un puits d'injection partant de la surface et débouchant dans ladite couche souterraine de façon à provoquer l'oxydation partielle ou totale desdites matières hydrocarbonnées et l'écoulement de celles-ci à l'état de fluides vers au moins un puits de production situé à distance dudit puits d'injection et débouchant également dans ladite couche souterraine, ledit puits d'injection étant constituté d'un premier tube central, d'un deuxième tube concentrique au premier définissant un premier espace annulaire et d'un cuvelage concentrique audit deuxième tube définissant un deuxième espace annulaire et s'étendant plus en profondeur dans la couche souterraine que lesdits premier et deuxième tubes.The present invention relates to a process for the oxidation of underground sedimentary layers containing hydrocarbonaceous materials, according to which an inert or weakly oxidizing gas is injected in a first step and an oxygen-containing gas in a second step, into at least one well. injection starting from the surface and opening into said underground layer so as to cause the partial or total oxidation of said hydrocarbon materials and the flow of these in the form of fluids to at least one production well located at a distance of said injection well and also opening into said underground layer, said injection well being constituted by a first central tube, by a second tube concentric with the first defining a first annular space and by a casing concentric with said second tube defining a second annular space and extending deeper into the underground layer than said first and second tubes.
Il existe différentes méthodes pour oxyder les couches sédimentaires souterraines contenant des matières hydrocarbonées parmi lesquelles les méthodes dites «thermiques» qui consistent à oxyder les couches souterraines à l'aide d'un gaz oxydant, d'air, d'air enrichi en oxygène ou d'oxygène pur. Selon ces méthodes, l'oxydation des couches hydrocarbonnées est:
- - soit partielle (gazéification du charbon) faisant intervenir des réactions du type:
- - soit totale (récupération assistée du pétrole par combustion in situ).
- - either partial (gasification of coal) involving reactions of the type:
- - or total (enhanced oil recovery by in situ combustion).
La plupart des installations de mise en oeuvre des méthodes utilisées actuellement comportent un puits d'injection débouchant dans la couche souterraine hydrocarbonée et au moins un puits de production situé à une certaine distance du puits d'injection. Le puits d'injection comprend un tube central dit «tubing» dans lequel on injecte le gaz contenant de l'oxygène et un tube concentrique audit tubing dans lequel on injecte, par exemple, de l'eau dite eau de réaction. Ceci entraîne soit une modification de la viscosité des matières hydrocarbonées contenues dans la couche souterraine (cas du pétrole), soit leur oxydation partielle (cas du charbon), cequi, dans les deux cas, favorise l'écoulement desdites matières hydrocarbonées vers le ou les puits de production.Most of the installations for implementing the methods currently used comprise an injection well opening into the underground hydrocarbon layer and at least one production well located at a certain distance from the injection well. The injection well comprises a central tube called "tubing" into which the oxygen-containing gas is injected and a tube concentric with said tubing into which is injected, for example, water called reaction water. This causes either a modification of the viscosity of the hydrocarbon materials contained in the underground layer (case of petroleum), or their partial oxidation (case of coal), which, in both cases, promotes the flow of said hydrocarbon materials towards the production wells.
Il est connu de FR-A-1 080 040 de faciliter l'extraction du pétrole des gisements souterrains en maintenant une pression constante dans lesdits gisements. Pour cela, on injecte un gaz inerte pour éliminer le gaz naturel, puis de l'air comprimé de manière à réaliser une combustion dans le sous-sol.It is known from FR-A-1 080 040 to facilitate the extraction of petroleum from underground deposits by maintaining a constant pressure in said deposits. For this, an inert gas is injected to remove the natural gas, then compressed air so as to carry out combustion in the basement.
L'un des problèmes essentiels rencontrés dans ces méthodes d'oxydation des couches souterraines de matières hydrocarbonées provient du fait que les pressions d'injection du gaz oxydant et de l'eau dans le puits d'injection sont le plus souvent très élevées du fait, soit de la valeur de la pression hydrostatique de fond, soit de la volonté de travailler à haute pression. Ainsi, les pressions d'injection des produits peuvent atteindre des valeurs telles que les cinétiques d'oxydation sont accélérées au point de pouvoir rendre les réactions explosives. C'est pourquoi, dans un but de sécurité, on cherche à limiter le plus possible ces risques d'explosion lors de la mise en oeuvre de ces procédés.One of the essential problems encountered in these methods of oxidizing underground layers of hydrocarbon materials stems from the fact that the injection pressures of the oxidizing gas and of the water in the injection well are most often very high because , either the value of the bottom hydrostatic pressure, or the desire to work at high pressure. Thus, the injection pressures of the products can reach values such that the oxidation kinetics are accelerated to the point of being able to make the reactions explosive. This is why, with a view to safety, it is sought to limit these risks of explosion as much as possible during the implementation of these methods.
Parmi les procédés d'oxydation de couches souterraines selon lesquels on cherche à limiter les risques d'explosion, on peut citer le procédé décrit dans EP-A-0 057 641 selon lequel le tube central d'injection du gaz oxydant comporte à son extrémité inférieure un ajutage dont les dimensions sont calculées de façon à ce que la vitesse d'arrivée dudit gaz oxydant soit telle que, s'il se produit une explosion au fond du puits d'injection, il n'y ait pas retour de flamme. On peut également citer le procédé décrit dans EP-A-0 075 515 qui consiste à injecter de l'oxygène dans un conduit séparé et éloigné d'une certaine distance du conduit d'injection d'air ou d'eau.Among the methods of oxidizing underground layers according to which it is sought to limit the risks of explosion, mention may be made of the method described in EP-A-0 057 641 according to which the central tube for injecting the oxidizing gas has at its end lower a nozzle whose dimensions are calculated so that the speed of arrival of said oxidizing gas is such that, if an explosion occurs at the bottom of the injection well, there is no flashback. Mention may also be made of the process described in EP-A-0 075 515 which consists in injecting oxygen into a separate pipe and distant from a certain distance from the air or water injection pipe.
Linvention a pour objet un procédé d'oxydation de couches souterraines hydrocarbonées du type énoncé dans le préambule de la revendication 1 qui permet également de résoudre ce problème de sécurité et présente l'avantage d'être d'une mise en oeuvre simple.The subject of the invention is a process for the oxidation of underground hydrocarbon layers of the type set out in the preamble to claim 1, which also makes it possible to solve this safety problem and has the advantage of being simple to implement.
Le procédé selon l'invention est caractérisée en ce que lesdits premier et deuxième tubes 4, 5 débouchent dans la partie inférieure dudit cuvelage après avoir traversé un joint annulaire d'étanchéité placé entre le deuxième tube et le cuvelage, une circulation d'eau froide étant établie dans le deuxième espace annulaire au cours de l'étape d'injection d'oxygène, en ce que, au cours de la première étape, on injecte le gaz inerte ou peu oxydant dans le premiertube central, en ce que, au cours de la seconde étape on injecte dans ledit tube central un gaz oxydant et on augmente progressivement la concentration en oxygène dudit gaz oxydant, et on injecte dans le premier espace annulaire de l'eau de réaction, les fluides de réaction injectés pénétrant dans la couche souterraine par des perforations régulièrement réparties, ménagées dans la paroi latérale de la partie inférieure du cuvelage, et en ce que au cours de la seconde étape, on contrôle la pression là où la réaction a lieu dans lesdites couches sédimentaires souterraines afin de détecter un danger d'explosion, l'injection des fluides de réaction étant immédiatement arrêtée lorsqu'une variation de pression correspondant à un tel danger d'explosion à été décelée et on injecte à la place, dans l'espace annulaire un fluide de sécurité choisi parmi l'azote, l'anhydride carbonique et l'eau de noyage, la séquence d'injection des fluides selon les deux étapes ci-dessus étant reprise, après contrôle de l'incident.The method according to the invention is characterized in that said first and
Selon une caractéristique de l'invention, au cours de la deuxième étape, dans un premier stade, on augmente la concentration en oxygène du gaz injecté dans le tube central dans une proportion d'environ 1 % à environ 30% d'oxygène, et dans un deuxième stade, on augmente la concentration en oxygène dudit gaz jusqu'à une proportion maximum comprise entre 75% et 99,5%.According to a characteristic of the invention, during the second stage, in a first stage, the oxygen concentration of the gas injected into the central tube is increased in a proportion of approximately 1% to approximately 30% of oxygen, and in a second stage, the oxygen concentration of said gas is increased to a maximum proportion of between 75% and 99.5%.
Les avantages et caractéristiques de l'invention seront mieux compris à la lecture de la description qui suit en référence à la figure jointe qui représente un mode de réalisation d'un puits d'injection permettant la mise en oeuvre du procédé objet de l'invention.The advantages and characteristics of the invention will be better understood on reading the description which follows with reference to the appended figure which represents an embodiment of an injection well allowing the implementation of the process which is the subject of the invention.
Un puits d'injection 1 part de la surface libre 2 du terrain concerné et débouche dans la couche souterraine 3 contenant des matières hydrocarbonées. Le puits 1 comprend un tube central 4, un deuxième tube 5 concentrique au tube 4 et un cuvelage 6 concentrique au tube 5. Le tube 5 définit avec le tube 4 un premier espace annulaire 7, et le cuvelage 6 définit avec le tube 5 un deuxième espace annulaire 8. Le cuvelage 6 s'étend plus en profondeur dans la couche souterraine 3 que les tubes 4 et 5. Les tubes 4 et 5 débouchent dans l'extrémité inférieure du cuvelage 6 après avoir traversé un joint annulaire d'étanchéité 9 dit «packer». La paroi latérale de la partie inférieure du cuvelage 6 qui est dans la couche souterraine 3 est munie de perforations 10 régulièrement réparties. Des moyens d'injection, de régulation et de maintenance, dits «arbre de Noël», placés à la surface 2 sont symbolisés en 11. Le tube central 4 est un tube bobiné déroulé à partir d'une bobine 12 fixée en surface sur un dispositif approprié (non représenté sur la figure); le tube 4 peut également être constitué par des éléments tubulaires vissés les uns au autres. Toutefois, on préfère utiliser un tube bobiné déroulé qui présente l'avantage de pouvoir être installé et retiré rapidement. Ce tube 4 est, de préférence, en métal inoxydable ou réfractaire.An injection well 1 starts from the
La mise en oeuvre du procédé de l'invention est la suivante.The implementation of the method of the invention is as follows.
On injecte tout d'abord, dans le tube 4, un gaz inerte ou peu oxydant de façon à purger le fond du puits, ce qui permet, lors de l'étape suivante, de démarrer l'oxydation dans une zone où les risques d'explosion sont minimes.First of all, an inert or slightly oxidizing gas is injected into the tube 4 so as to purge the bottom of the well, which makes it possible, during the next step, to start the oxidation in an area where the risks of 'explosion are minimal.
Une fois cette première étape du purge terminée, on injecte dans le tube 4 un gaz contenant de l'oxygène et on augmente progressivement la concentration en oxygène dudit gaz jusqu'à une proportion maximum comprise entre 75% et 99,5%. Simultanément, on injecte de l'eau de réaction dans l'espace annulaire 7; par «eau de réaction», on entend de l'eau sous forme, soit de liquide, soit de vapeur, soit de mousse. De plus, on établit une circulation d'eau froide dans l'espace annulaire 8 de façon à éviter un échauffement trop important du «packer» 9 (en effet, le packer, qui est constitué d'éléments hydrocarbonés, type caoutchouc, ne supporte pas des températures trop élevées). Cette circulation d'eau de refroidissement peut de façon avantageuse être mise en place dans l'espace annulaire 8 grâce à un dispositif classique (non représenté sur la figure) du type «Coiled Tubing» (tube bobiné déroulé) ou «Snubbing» (éléments tubulaires vissés).Once this first stage of purging is completed, an oxygen-containing gas is injected into the tube 4 and the oxygen concentration of said gas is gradually increased to a maximum proportion of between 75% and 99.5%. Simultaneously, reaction water is injected into the
Grâce à un système de détection approprié (non représenté sur la figure) placé en surface, si l'on décèle une variation de pression correspondant à un danger d'explosion, on arrête immédiatement l'injection des fluides de réaction et on injecte à la place, dans l'espace annulaire 7, un fluide de sécurité tel que de l'azote, de l'anhydride carbonique ou de l'eau de noyage. Après contrôle de l'incident, on reprend la séquence d'injection à zéro.Thanks to an appropriate detection system (not shown in the figure) placed on the surface, if a pressure variation corresponding to a danger of explosion is detected, the injection of reaction fluids is immediately stopped and injected at the places, in the
A titre d'exemple, la première étape de purge dure environ quelques jours, le premier stade de la deuxième étape d'oxydation (concentration en oxygène du gaz injecté dans le tube 4 augmentant d'environ 1 % à environ 30%) est d'environ 15 jours et la durée du deuxième stade de cette deuxième étape (augmentation de la concentration en oxygène du gaz injecté dans le tube 4 pouvant aller jusqu'à environ 99,5%) est d'environ 350 jours à 700 jours. En cas d'incident, l'injection d'un fluide de sécurité dans l'espace annulaire 7 est d'environ 1 heure.For example, the first purging step lasts about a few days, the first stage of the second oxidation step (oxygen concentration of the gas injected into the tube 4 increasing from about 1% to about 30%) is d about 15 days and the duration of the second stage of this second stage (increase in the oxygen concentration of the gas injected into the tube 4 which can go up to approximately 99.5%) is approximately 350 days to 700 days. In the event of an incident, the injection of a safety fluid into the
Toujours, à titre d'exemple, on signale que le débit d'injection du gaz oxydant dans le tube 4 peut aller de 1000 à 10000 m3/h et que le débit d'injection de l'eau de réaction dans l'espace annulaire 7 peut être de 10 litres par m3 de gaz oxydant injecté dans le tube 4.Still, by way of example, it is pointed out that the rate of injection of the oxidizing gas into the tube 4 can range from 1000 to 10,000 m 3 / h and that the rate of injection of the reaction water into space annular 7 can be 10 liters per m 3 of oxidizing gas injected into the tube 4.
Ainsi, le procédé conforme à l'invention permet d'évitertout risque d'explosion lors de l'oxydation de couches souterraines contenant des matières hydrocarbonées, d'une part grâce à la première étape de purge, d'autre part grâce à la possibilité de contrôle des réaction par injection d'un fluide de sécurité en cas d'incident.Thus, the process according to the invention avoids any risk of explosion during the oxidation of underground layers containing hydrocarbonaceous materials, on the one hand thanks to the first purging step, on the other hand thanks to the possibility for monitoring reactions by injecting a safety fluid in the event of an incident.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT84401286T ATE24226T1 (en) | 1983-06-30 | 1984-06-21 | METHODS OF OXIDATION OF UNDERGROUND HYDROCARBON SEDIMENTARY RESERVES. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8310829 | 1983-06-30 | ||
| FR8310829A FR2548207B1 (en) | 1983-06-30 | 1983-06-30 | PROCESS FOR THE OXIDATION OF UNDERGROUND SEDIMENTARY LAYERS CONTAINING HYDROCARBON MATERIALS |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0131499A1 EP0131499A1 (en) | 1985-01-16 |
| EP0131499B1 true EP0131499B1 (en) | 1986-12-10 |
Family
ID=9290328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP84401286A Expired EP0131499B1 (en) | 1983-06-30 | 1984-06-21 | Method for the oxidation of hydrocarbonaceous subterranean sedimentary formations |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0131499B1 (en) |
| AT (1) | ATE24226T1 (en) |
| AU (1) | AU556316B2 (en) |
| BR (1) | BR8403250A (en) |
| DE (1) | DE3461669D1 (en) |
| FR (1) | FR2548207B1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6443344A (en) * | 1987-08-12 | 1989-02-15 | Univ Tohoku | Vessel for underground chemical reaction |
| CN1320253C (en) * | 1998-05-29 | 2007-06-06 | 柴兆喜 | Mine for directly producing coal gas in coal layer and its prodn. method |
| ITMI20101095A1 (en) * | 2010-06-17 | 2011-12-18 | Antonino Gambino | PETROLEUM ARREST DEVICE FROM THE FIELD |
| CN108386171B (en) * | 2018-02-22 | 2020-02-14 | 中海石油(中国)有限公司 | Method for optimizing water injection strength of oil well after water breakthrough in deep water turbid sandstone water injection development |
| CN115163021B (en) * | 2022-07-13 | 2023-11-03 | 中国矿业大学 | Water injection and nitrogen injection gas extraction hole sealing device and drilling arrangement method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1080040A (en) * | 1952-05-16 | 1954-12-06 | Union Rheinische Braunkohlen | Process for maintaining constant pressure in oil and natural gas fields |
| DE1247238B (en) * | 1966-08-12 | 1967-08-17 | Erdoel Ag Hamburg Deutsche | Process for conveying bitumina from storage facilities |
| US3987852A (en) * | 1974-09-30 | 1976-10-26 | Terry Ruel C | Method of and apparatus for in situ gasification of coal and the capture of resultant generated heat |
| US4042026A (en) * | 1975-02-08 | 1977-08-16 | Deutsche Texaco Aktiengesellschaft | Method for initiating an in-situ recovery process by the introduction of oxygen |
| DE2623318A1 (en) * | 1975-06-02 | 1976-12-23 | Inst Nat Des Ind Extractives I | METHOD AND DEVICE FOR SMELTERING SOLID FUELS UNDERGROUND |
| CA1170979A (en) * | 1981-01-28 | 1984-07-17 | Guy Savard | In situ combustion for oil recovery |
-
1983
- 1983-06-30 FR FR8310829A patent/FR2548207B1/en not_active Expired
-
1984
- 1984-06-21 DE DE8484401286T patent/DE3461669D1/en not_active Expired
- 1984-06-21 EP EP84401286A patent/EP0131499B1/en not_active Expired
- 1984-06-21 AT AT84401286T patent/ATE24226T1/en not_active IP Right Cessation
- 1984-06-28 AU AU29997/84A patent/AU556316B2/en not_active Ceased
- 1984-06-29 BR BR8403250A patent/BR8403250A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| EP0131499A1 (en) | 1985-01-16 |
| FR2548207B1 (en) | 1987-06-05 |
| DE3461669D1 (en) | 1987-01-22 |
| AU2999784A (en) | 1985-01-03 |
| FR2548207A1 (en) | 1985-01-04 |
| ATE24226T1 (en) | 1986-12-15 |
| BR8403250A (en) | 1985-06-11 |
| AU556316B2 (en) | 1986-10-30 |
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