EP3179166A1 - Dispositif et procédé de traitement thermo-mécanique de formations géologiques souterraines - Google Patents

Dispositif et procédé de traitement thermo-mécanique de formations géologiques souterraines Download PDF

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Publication number
EP3179166A1
EP3179166A1 EP15198415.0A EP15198415A EP3179166A1 EP 3179166 A1 EP3179166 A1 EP 3179166A1 EP 15198415 A EP15198415 A EP 15198415A EP 3179166 A1 EP3179166 A1 EP 3179166A1
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EP
European Patent Office
Prior art keywords
fuel
cylindrical container
bed
perforation
annular space
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP15198415.0A
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German (de)
English (en)
Inventor
Vladimir Stehle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wintershall Dea GmbH
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Wintershall Holding GmbH
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Filing date
Publication date
Application filed by Wintershall Holding GmbH filed Critical Wintershall Holding GmbH
Priority to EP15198415.0A priority Critical patent/EP3179166A1/fr
Publication of EP3179166A1 publication Critical patent/EP3179166A1/fr
Withdrawn legal-status Critical Current

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    • 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
    • E21B36/02—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones using burners
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C13/00—Apparatus in which combustion takes place in the presence of catalytic material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C3/00—Combustion apparatus characterised by the shape of the combustion chamber
    • F23C3/002—Combustion apparatus characterised by the shape of the combustion chamber the chamber having an elongated tubular form, e.g. for a radiant tube
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2209/00—Specific waste
    • F23G2209/24—Contaminated soil; foundry sand

Definitions

  • the present invention relates to an apparatus and method for the thermomechanical treatment of subterranean geological formations, preferably in the development of conventional and unconventional oil reservoirs and in the stimulation of wells.
  • Known apparatus and methods for thermal treatment of deposits include burning different fuels in the well to inject the hot products of combustion into the deposit.
  • These devices also referred to as "downhole burners"
  • have a number of disadvantages such as a complicated supply of fuel and electrical ignition energy, requiring special hose cables and a complex ignition system.
  • the known systems therefore have only a low reliability.
  • WO 2007/081816 A2 and US 4,604,988 Devices and methods are known which could allow the burning of gaseous or liquid substances in a well of a deposit.
  • the described devices are relatively complex and the methods have a low flexibility, so that they offer limited opportunities to introduce heat deep into a deposit due to lower reliability, especially at great depth.
  • the probability of spontaneous failure of the combustion process is high and the bore may possibly be damaged as the combustion process is performed directly in the bore.
  • the object of the present invention is to provide a device for the thermo-mechanical treatment of subterranean geological formations and to provide a corresponding method which overcome these disadvantages and offer a reliable but at the same time simple and inexpensive technology Damage to the borehole and contamination of the deposit.
  • the present invention offers the advantages of providing a technology that is simple and cost-effective over the prior art, while being robust and reliable in order to reliably and efficiently perform thermo-mechanical treatments of subsurface geological formations.
  • damage to the wellbore lining is mitigated by the effect of high temperatures encountered with conventional downhole burners, as well as contamination of the reservoir by the introduction of soot particles from the combustion processes.
  • a stabilization of the burning of the fuel in the borehole and a simplification of the fuel ignition in the borehole is achieved.
  • a first aspect of the present invention relates to a device (3) for the thermo-mechanical treatment of subterranean geological formations.
  • This device (3) comprises a cylindrical container (5) with a bottom region (13) and a lid region (14) and a feed tube (10) arranged concentrically in the cylindrical container (5) and which is guided through an inlet opening (8) in the lid region (FIG. 14) is guided and in the bottom region (13) within the cylindrical container (5) ends.
  • annular space (12) is formed, and in the annular space (12) at least partially a bed (6) of at least one particulate catalyst (6a) is provided.
  • at least one outlet opening (9) is provided in the lid region (14) of the cylindrical container (5).
  • the feed tube (10) has a circumferential perforation (11) at least over part of its length arranged in the cylindrical container (5).
  • thermo-mechanical treatment is understood to mean that as a result of an exothermic reaction, a reservoir matrix (1) is influenced both thermally, in particular by heat, and mechanically, in particular by increased pressure. According to the invention thus a cumulative and / or synergistic effect is achieved.
  • the cylindrical container (5) is preferably made of metal, e.g. temperature-resistant steel, in particular temperature-resistant alloys based on nickel and / or titanium, to withstand the extreme conditions (such as pressure, temperature) in a hole (2) of greater depth (up to 5 km).
  • metal e.g. temperature-resistant steel, in particular temperature-resistant alloys based on nickel and / or titanium, to withstand the extreme conditions (such as pressure, temperature) in a hole (2) of greater depth (up to 5 km).
  • Typical dimensions of the device (3) according to the invention are 10 cm to 20 cm in diameter and 100 cm to 300 cm in length.
  • the diameter is defined in particular by inner tube diameter of the bore.
  • the diameter of the device (3) according to the invention is 10% to 30% smaller than the inner diameter of the surrounding bore (2).
  • the bottom region (13) is formed with an outward pointing rounding.
  • the bottom portion (13) is further preferably made of the same material as the cylindrical container (5) and firmly connected with this cohesive or at least non-positively, ie it can be welded or screwed.
  • the lid portion (14) may also be made of the material of the cylindrical container (5), but may also comprise another material.
  • the lid region (14) is non-positively, but detachably connected to the cylindrical container (5) in order, for example, to be able to exchange the particulate catalyst (6a).
  • At least one outlet opening (9) is provided, which serves to deliver reaction products from the interior of the device (3) to the outside.
  • the feed tube (10) arranged concentrically in the cylindrical container (5) is concentrically aligned and held by the inlet opening (8) in the lid region (14) and by a corresponding holder (13b) in the bottom region (13).
  • the feed tube (10) may preferably be frictionally and reversibly connected in the lid region (14), i. It may be welded or screwed while it is mounted only positively and reversibly in the bottom region (13).
  • the feeding tube (10) according to the invention has a diameter of 3 cm to 12 cm and a length of 100 cm to 1,000 cm, wherein the feed tube (10) in any case at least 10% longer than the device (3).
  • the diameter of the feed pipe (10) corresponds in particular to the diameter of the pipe string (7).
  • the feed pipe (10) can also be made of temperature-resistant steel.
  • the annular space (12) is formed, which is further closed at the bottom by the bottom portion (13) and at the top by the lid portion (14).
  • the bed (6) of at least one particulate catalyst (6a) is provided in the annular space (12) in the annular space (12).
  • This bed (6) can occupy 60%, preferably 70% and up to 100% of the volume of the annular space (12).
  • the particulate catalyst (6a) may comprise shaped catalyst bodies consisting of active component coated high strength porous carrier particles.
  • Typical carrier particles are, for example, cylindrical (hollow or solid) with dimensions of 3 mm ⁇ 3 mm to 6 mm ⁇ 6 mm or spherical with diameters of 1 mm to 6 mm.
  • the carrier particles may preferably be formed of ceramic materials, eg alumina, zeolites and silica.
  • at least one catalytically active active component applied to the carrier particles preferably platinum and / or palladium.
  • porous carrier particles having a large internal surface area can be mixed with an aqueous solution of a metal salt. Step by step, the carrier particles impregnated in this way are dried and finally calcined, whereby the active component can be converted into the metal or the metal oxide.
  • catalysts in addition to the invention particularly preferred platinum, palladium, manganese, potassium and metals, metal oxides and metal salts of the elements copper, cadmium, iron, gold, silver, nickel, vanadium can be used.
  • the particulate catalysts (6a) according to the invention can be used fully functional for at least one year.
  • the feed pipe (10) has a circumferential perforation (11) over at least part of its length arranged in the cylindrical container (5).
  • the diameter or the cross section of the individual openings of the circumferential perforation (11) is smaller than the diameter of the particles of the particulate catalysts (6a).
  • length arranged in the cylindrical container (5) is meant the length between the lid portion (14) in which the feeding tube (10) is fixed, and the holder (13b) in the bottom portion (13). This length is 80% to 100% of the length of the device (3) or 80% to 110% of the length of the cylindrical container (5).
  • the part of its length over which the feed pipe (10) is provided with the peripheral perforation (11) is 5% to 50%, preferably 10% to 20%.
  • the circumferential perforation (11) can have different geometric shapes. Slit-shaped and / or circular openings of the peripheral perforation (11) are preferred according to the invention.
  • the special feature of the circumferential perforation (11) leads to the advantage that fuel (17) supplied through the feed pipe (10) is more evenly distributed to the bed (6) of the at least one particulate catalyst (6a), so that the reaction in the Batch can be performed more consistently and thus more stable.
  • the perforation (11) of the feed tube (10) is arranged in a section facing the bottom region (13).
  • the bottom region (13) facing portion is the vertically lower portion or the end of the feed tube (10) understood, which is adjacent to the vertically lower portion of the bed (6) of the at least one particulate catalyst (6a).
  • This lower section is preferably 5% to 50%, preferably 10% to 20%, of the length of the feed tube (10).
  • the annular space (12) can be delimited at least partially towards the lid region (14) by an upper dividing wall (25a), which in particular at least partially has a perforation (20a).
  • the upper partition wall (25a) thus limits the bed (6) of the at least one particulate catalyst (6a) towards the lid region (14), so that discharge of the particulate catalyst (6a) is prevented. Discharged particulate catalyst (6a) could disadvantageously clog the outlet port (9), for example.
  • the shape of the openings of the perforation (20a) corresponds to the shape of the openings circumferential perforation (11), as described above.
  • the annular space (12) towards the bottom area (13) may at least partially be delimited by a lower partition (25b), which in particular at least partially has a perforation (20b).
  • the lower partition wall (25b) limits the bed (6) of the at least one particulate catalyst (6a) to the bottom area (13) and thus supports the bed (6).
  • the perforation (20b) whose perforation diameter is smaller than the diameter of the particulate catalyst (6a) ensures gas exchange to the bottom region (13).
  • the Kamer (16) can also serve the partial cooling of the combustion products, if the overheating of the Bohrlochnah Kunststoffes not is desired.
  • the shape of the openings of the perforation (20b) corresponds to the shape of the openings circumferential perforation (11), as described above.
  • a development of the device (3) according to the invention provides that an upper annular chamber (16) is provided between the upper partition wall (25a) and the lid region (14).
  • the length of the chamber (16) is preferably from 5% to 100% of the length of the annulus (12), i. the combustion chamber.
  • a longer chamber (16) can be provided for the case in which the cooling is necessary.
  • the upper annular chamber (16) can receive and collect reaction products from the annulus (12) so that the pressure in them rises before being discharged outside the device (3).
  • a lower annular chamber (15) is provided between the lower dividing wall (25b) and the bottom area (13).
  • the length of the chamber (15) is preferably from 5% to 100% of the length of the annulus (12), i. the combustion chamber.
  • the lower annular chamber (15) facilitates a uniform distribution of fuel (17) supplied through the feed pipe (10) to the bed (6) of the at least one particulate catalyst (6a) provided in the annular space (12).
  • the perforation (20b) of the lower partition wall (25b) is advantageous. In this embodiment, all the fuel particles remain in the annulus (12) for the same time, ensuring reaction stabilization.
  • the perforation (11) of the feed tube (10) may be at least partially disposed in the lower annular chamber (15).
  • the at least one outlet opening (9) in the lid region (14) has a valve (23).
  • the valve (23) according to the invention may be a check valve to prevent the ingress of atmosphere from the borehole (2) into the device (3). Furthermore, the valve (23) may be an overpressure valve in order to direct the collected reaction products (18) at a specific pressure in a targeted and bundled manner against the reservoir matrix (1).
  • the valve (23) according to the invention can be adjusted in particular so that when the fuel (17) is burned off, the combustion products are released repeatedly (when the pressure in the chamber (16)) is increased. Thus, a pressure increase or a pressure drop is also generated in the borehole (2). This increases the efficiency of well stimulation and the displacement of combustion products into the reservoir matrix (1).
  • the feed pipe (10) can in particular be connectable to a flexible pipe string (7) via a connecting element (19) arranged outside the lid region (14).
  • the device (3) is supplied with fuel (17) from above ground by means of a flexible pipe string (7).
  • the diameter of the flexible pipe string (7) also corresponds to the diameter of the feed pipe (10). It has therefore been found advantageous to provide a connecting element (19) for reversibly reversing the flexible tubing string (7) with the device (3), i. the supply pipe (10) to connect.
  • the flexible pipe string (7) is advantageous in stimulating the borehole (2), since in this case the use of the device (3) according to the invention is short-term.
  • the connecting element (19) may be, for example, a flange.
  • the device (3) according to the embodiments described above can be regarded as a fixed bed reactor, in the educts (fuel (17)) fed continuously and the products (combustion products (18), water vapor) are continuously removed.
  • a free space (22) can be provided between the bed (6) of the at least one particulate catalyst (6a) and the upper dividing wall (25a) provided in the annular space (12).
  • the clearance (22) is preferably 5% to 10% of the annulus (12), i. the reactor volume,.
  • annulus (12) may also be divided by multiple walls (multi-level or multi-space reactor), each section being filled with catalyst (6).
  • Another variant consists of an annular space (12) with two sections, one section of which is filled with the particulate catalyst (6a) for the fuel (17) and the other section with the particulate catalyst (6b) for hydrogen peroxide.
  • annular space (12) is only partially filled with the bed (6) of the at least one particulate catalyst (6a) and consequently the free space (22) is present, depending on the supplied amount of the fuel (17) and the corresponding mass flow in the annular space (12) a fluidized bed of the at least one particulate catalyst (6a) are formed.
  • the reaction of the fuel (17) in a fluidized bed can be performed even more efficiently.
  • the device (3) according to this specific embodiment can therefore be regarded as a fluidized-bed reactor in which educts (fuel (17)) and at least partially products (combustion products (18), water vapor) fluidize the at least one particulate catalyst (6a) into a fluidized bed.
  • the bed (6) provided in the annular space (12) comprises at least two different particulate catalysts (6a, 6b).
  • These different particulate catalysts (6a, 6b) may in particular have different catalytically active components in order to catalyze different constituents present in the fuel (17). Specific embodiments of the various constituents of the fuel (17) will be discussed in connection with the method described below.
  • the device (3) according to the invention in its embodiments and developments described above can advantageously in the development of conventional and unconventional oil deposits, but especially of deposits with heavy oil, shale oil and bitumen, as well as in the stimulation of the oil inflow in the Drill holes are used in production.
  • a second aspect of the present invention relates to a method of thermo-mechanical treatment of subterranean geological formations.
  • a device (3) according to the invention as described above, is introduced into a bore (2).
  • the hole was previously sunk by a conventional method.
  • a fuel (17) is introduced into the device (3), whereupon in a step c) a catalytic combustion of the fuel (17) in the presence of the at least one particulate catalyst (6a) is performed.
  • step d combustion heat of the catalytic combustion of the fuel (17) is then discharged to a reservoir matrix (1) adjacent to the bore (2) and finally in a step e) combustion products (18) of the catalytic combustion of the fuel (17) introduced into the deposit matrix (1).
  • the introduction of the device (3) according to the invention in the bore (2) is preferably carried out by rolling a flexible tubing string (7) over days, at the end of the device (3) is attached.
  • the introduction can be supported at the wellhead (28) by a pull / push device.
  • the device (3) according to the invention is preferably positioned in the bore (2) in such a way that it coincides with the lid region (14) at the same height or below the area of the bore (2) to be treated or a possibly existing drill hole perforation (21). is arranged.
  • the thermo-mechanical treatment can be performed optimally.
  • the bore (2) may also be temporarily closed above the device (3) after step a) and before step b), described in more detail below, by means of a closure device (4) for effecting the thermo-mechanical treatment on a specific region of the bore (2) to focus.
  • the closure device (4) is preferably arranged just above the area of the bore (2) to be treated or a possibly existing drill hole perforation (21).
  • step b) the fuel (17) is introduced into the device (3).
  • fuel as used herein includes liquid and gaseous fuels as well as fuel mixtures.
  • the fuel (17) according to the invention can also vary from liquid to gaseous.
  • fuel (17) preferably e.g. Natural gas, propane, naphtha, kerosene or diesel distillate
  • a preferred mixture of the fuel (17) comprises water, methanol and hydrogen peroxide, in particular in a ratio of 50% by weight of water / 35% by weight of methanol / 15% by weight of hydrogen peroxide.
  • the introduction of the fuel (17) takes place from one or more conventional containers over the day through the flexible pipe string (7) in the feed pipe (10) and of there by the circumferential perforation (11) directly or indirectly in the bed (6) of the at least one particulate catalyst (6a).
  • step c) catalytic combustion of the fuel (17) then takes place in the presence of the at least one particulate catalyst (6a).
  • the catalytic combustion is "flameless", ie the fuel (17) is converted by the presence of the at least one particulate catalyst (6a) in an exothermic chemical reaction directly into the reaction products (18) with evolution of heat / heat, ie oxidized.
  • the exothermic chemical reaction is in principle already started upon contact of the fuel (17) with the particulate catalyst (6a), depending on the type of fuel (17), the type of particulate catalyst (6a), the bulk density of the particulate catalyst (6a ) Temperatures between 500 ° C and 1000 ° C in the burner to be developed.
  • CO 2 mainly CO 2 , CO and possibly hydrocarbons, especially water vapor is generated.
  • An important advantage of the catalytic combustion according to the invention is that only gaseous reaction products are produced, but no particles such as soot, which can affect the permeability of the deposit matrix (1).
  • step d) the combustion heat generated by the catalytic combustion of the fuel (17) at the high temperatures mentioned above will be released to the deposit matrix (1) adjacent to the well (2). Specifically, at least part of the heat of combustion is transmitted to the cylindrical container (5), which in turn radiates the heat of combustion on the walls of the bore (2), which is optionally lined with a casing. In this way, a thermal treatment of the deposit matrix (1) is performed. This thermal treatment can for example reduce the viscosity of the oil to be delivered.
  • thermomechanical means (27) in the reservoir matrix (1) in the form of heat transfer agents, oil displacing agents or oil viscosity reducing agents.
  • the thermomechanical means (27) further assisted in maintaining the pressure in the reservoir matrix (1).
  • the method according to the invention has the advantage that it combines a thermal treatment and a mechanical treatment of the deposit matrix (1) on the basis of the catalytic combustion and thereby generates synergy effects which on the one hand lead to a safer and more efficient use of the fuel (17) and on the other hand ensure a reliable and effective treatment.
  • preheating of at least part of the bed (6) of the at least one particulate catalyst (6a) provided in the device (3) is included.
  • the preheating according to the invention of at least part of the bed (6) of the at least one particulate catalyst (6a) provided in the device (3) can be carried out in particular by at least temporary introduction of a solution containing hydrogen peroxide.
  • gaseous fuels eg methane / air
  • this gaseous fuel must be preheated in any case, regardless of the catalyst system used.
  • step b) first of all a first type of fuel (17) is introduced which comprises a solution containing hydrogen peroxide (H 2 O 2 ). Furthermore, the bed (6) has two different particulate catalysts (6a, 6b), a particulate catalyst (6a) for the actual fuel and a particulate catalyst (6b) for the hydrogen peroxide.
  • the hydrogen peroxide is required in certain particulate catalysts (6b), e.g. in manganese salt and / or potassium salt impregnated catalyst moldings no preheating, but reacts exothermically directly when flowing through the corresponding particulate catalysts (6b) to produce superheated steam and oxygen.
  • the temperature may be between 300 ° C and 600 ° C.
  • the hydrogen peroxide is basically needed only to preheat the system to a temperature at which catalytic combustion begins. Therefore, at the beginning of the process according to the invention in step b) a fuel (17) with a high concentration of hydrogen peroxide, in particular 15 wt .-% to 20 wt .-%, fed. Once the catalytic combustion has begun, the concentration of hydrogen peroxide in the fuel (17) introduced in step b) is reduced to 0% by weight to 10% by weight.
  • inventive fuel (17) in particular a mixture of water, methanol and hydrogen peroxide is preferred, in particular in the ratio of 50 wt .-% water / 35 wt .-% methanol / 15 wt .-% hydrogen peroxide at the beginning of the process and in the ratio 60 wt % Water / 40% methanol / 0% hydrogen peroxide by catalytic combustion.
  • the inventive method (3) can be used in its embodiments and developments described above in an advantageous manner in the development of Conventional and unconventional oil deposits, but especially from deposits with heavy oil, shale oil and bitumen, as well as in the stimulation of the oil inflow into the holes used in the production.
  • FIG. 1 schematically shows a first embodiment of the device 3 according to the invention, which can also be referred to as a "catalytic wellbore burner".
  • the device 3 comprises a cylindrical container 5 with bottom region 13 and lid region 14. In the lid region 14, it is provided with an inlet opening 8 into which a feed tube 10 is inserted and fixed concentrically in the cylindrical container 5.
  • the feed pipe 10 is connected by a connecting element 19 to a flexible pipe string 7 for supplying gaseous or liquid fuel 17 connected.
  • the feed pipe 10 is perforated in its lower part (circumferential perforation 11).
  • the lid portion 14 is further provided with at least two outlet openings 9 for discharging combustion products 18.
  • valves 23 are arranged in this embodiment.
  • annular space 12 Between the inner wall of the cylindrical container 5 and the feed pipe 10 is an annular space 12, i. a catalytic chamber, which is filled with a bed 6 of at least one particulate catalyst 6a, and possibly the particulate catalyst 6b, in the form of shaped catalyst bodies.
  • the annular space 12 is closed in this embodiment down in the bottom portion 13 by a bottom plate 13 a with a central holder 13 b for the feed pipe 10.
  • an upper partition wall 25a with at least partially inserted perforation 20a is provided as the end of the bed 6 at the top. Between the upper partition wall 25a and the lid portion 14, an upper annular chamber (16) is formed.
  • FIG. 2 a second embodiment of the device 3 according to the invention is shown schematically, which corresponds in many parts of the first embodiment. It has therefore been omitted here and in the following figures to provide the same elements again with reference numerals.
  • this second embodiment additionally has a lower partition wall 25b with at least partially introduced perforation 20b, which delimits a lower annular chamber 15 towards the bottom area 13.
  • the peripheral perforation 11 of the feed pipe 10 is in this embodiment completely in the region of the lower annular chamber 15, so that the fed through the feed pipe 10 fuel 17 after swirling into the lower annular chamber 15 through the perforation 20b from below into the bed 6th is initiated.
  • FIG. 3 schematically a third embodiment of the device 3 is shown, which largely corresponds to the second embodiment, in which the annular space 12, however, only partially, in this case about 80%, with the bed 6 of the at least one particulate catalyst 6a is filled so that a clearance 22 is formed over the bed to the upper partition wall 25a.
  • This free space 22 together with the only partial bed 6 makes it possible to form a fluidized bed of the at least one particulate catalyst 6 a in the annular space 12.
  • FIG. 4 schematically shows a vertical section of the bore 2 with device 3 inserted therein according to the first embodiment. This illustration is also applicable to the second and third embodiments.
  • the illustration shows how the fuel 17 is introduced through the flexible pipe string 7 into the feed pipe 10 and further through the peripheral perforation 11 into the lower part of the annular space 12.
  • the flow direction of the fuel 17 is changed and flows upwards in the vertical direction.
  • the oxidation of the fuel 17 begins, i. its catalytic combustion.
  • the resulting combustion products 18 enter through the perforations 20a provided with the upper partition wall 25a in the upper annular chamber 16 on the lid portion 14 of the device 3 a.
  • the combustion products 18 accumulate in the upper annular chamber 16, thereby increasing the pressure there. Upon reaching a certain pressure provided in the outlet openings 9 pressure relief valves 23 are opened and the combustion products 18 run as exiting combustion products 26 in the bore 2 addition.
  • the feed tube 10 Due to the catalytic combustion of the fuel 17, the feed tube 10 is heated within the device 3 in addition to the bed 6 and the cylindrical container 5. In addition, the exiting combustion products 26 heat the feed tube 10 outside of the device 3. As a result, the (cold) fuel 17 supplied from above is constantly heated before entering the annulus 12. This increases the reliability of the catalytic combustion by eliminating the cessation of catalytic combustion and ensuring complete oxidation of the fuel in annulus 12.
  • FIG. 5 shows a schematic overview of a deposit matrix 1 with 2 hole and incorporated therein device 3.
  • the device 3 After drilling the hole 2 and possibly the introduction of lining pipes, not shown here in the bore, the device 3 by means of the attached flexible tubing string 7, of a Drum 24 is unwound, introduced into the bore 2 to a depth in which the deposit matrix 1 is to be thermo-mechanically treated.
  • a pull / push device provided at the wellhead 28 (also referred to as "injector head”) can be used.
  • a closure means 4 also referred to as a "packer” can be provided above the deposit matrix 1 to be treated.
  • the flexible tubing 7 (also referred to as "coiled tubing") is usually made of high-strength steel, and its length corresponds at least to the depth of the hole 2. The length may be a few kilometers, in particular 8 km to 10 km.
  • the flexible pipe string 7 usually has a diameter of 19 mm to 100 mm and a wall thickness of 2 mm to 6 mm.
  • the inventive method is carried out, in conjunction with FIG. 4 already described in one embodiment.
  • the combustion products 26 exiting into the bore 2 increase the pressure in that portion of the bore 2 due to the presence of the closure means 4, so that the exiting combustion products 26 are forced into the reservoir matrix 1 upon reaching some pressure through the wellbore perforation 21 present in this embodiment ,
  • the leaked combustion products 26 act as thermo-mechanical means 27 in the form of heat exchangers, oil displacers or oil viscosity reducing agents.
  • step b) first of 1 m 3 to 3 m 3 of a peroxide in a concentration of 30 wt .-% to 70 wt .-% solution containing introduced through the feed tube 10 into the annular space 12th
  • a mixed bed 6 of particulate catalysts 6a, 6b is present, wherein the suitable for the hydrogen peroxide manganese and / or potassium particulate catalyst 6b immediately initiated the oxidation of the hydrogen peroxide, so that by the exothermic reaction heat to the bed. 6 and the entire device 3 is dispensed.
  • the catalytic combustion i. the flameless oxidation of the fuel 17.
  • the presence of the particulate catalyst 6a of the present invention reduces the initial catalytic combustion temperature by 20% to 50% and catalytically combusting at temperatures below that of non-catalytic combustion of comparable fuels. By this reduction of the initial temperature, the initiation of the catalytic combustion in the annular space 12 is easily possible.
  • thermo-mechanical treatment of subterranean geological formations can be carried out for several hours to several months, depending on the particular application.
  • an implementation for several hours is mainly about the stimulation of Production wells, while a multi-month run is mainly done in injection wells.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
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  • Life Sciences & Earth Sciences (AREA)
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  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
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  • Combustion & Propulsion (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
EP15198415.0A 2015-12-08 2015-12-08 Dispositif et procédé de traitement thermo-mécanique de formations géologiques souterraines Withdrawn EP3179166A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108442914A (zh) * 2018-05-29 2018-08-24 吉林大学 一种用于油页岩原位裂解的系统及方法

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3223166A (en) * 1963-05-27 1965-12-14 Pan American Petroleum Corp Method of controlled catalytic heating of a subsurface formation
US3497000A (en) * 1968-08-19 1970-02-24 Pan American Petroleum Corp Bottom hole catalytic heater
US4237973A (en) * 1978-10-04 1980-12-09 Todd John C Method and apparatus for steam generation at the bottom of a well bore
US4445570A (en) * 1982-02-25 1984-05-01 Retallick William B High pressure combustor having a catalytic air preheater
US4446917A (en) * 1978-10-04 1984-05-08 Todd John C Method and apparatus for producing viscous or waxy crude oils
US4475596A (en) * 1983-01-31 1984-10-09 Papst Wolfgang A Well stimulation system
US4604988A (en) 1984-03-19 1986-08-12 Budra Research Ltd. Liquid vortex gas contactor
US4706751A (en) * 1986-01-31 1987-11-17 S-Cal Research Corp. Heavy oil recovery process
DE69108204T2 (de) 1990-12-18 1995-07-20 Ici Plc Katalytische Verbrennung.
WO2007081816A2 (fr) 2006-01-09 2007-07-19 Direct Combustion Technologies Générateur de vapeur à combustion directe

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3223166A (en) * 1963-05-27 1965-12-14 Pan American Petroleum Corp Method of controlled catalytic heating of a subsurface formation
US3497000A (en) * 1968-08-19 1970-02-24 Pan American Petroleum Corp Bottom hole catalytic heater
US4237973A (en) * 1978-10-04 1980-12-09 Todd John C Method and apparatus for steam generation at the bottom of a well bore
US4446917A (en) * 1978-10-04 1984-05-08 Todd John C Method and apparatus for producing viscous or waxy crude oils
US4445570A (en) * 1982-02-25 1984-05-01 Retallick William B High pressure combustor having a catalytic air preheater
US4475596A (en) * 1983-01-31 1984-10-09 Papst Wolfgang A Well stimulation system
US4604988A (en) 1984-03-19 1986-08-12 Budra Research Ltd. Liquid vortex gas contactor
US4706751A (en) * 1986-01-31 1987-11-17 S-Cal Research Corp. Heavy oil recovery process
DE69108204T2 (de) 1990-12-18 1995-07-20 Ici Plc Katalytische Verbrennung.
WO2007081816A2 (fr) 2006-01-09 2007-07-19 Direct Combustion Technologies Générateur de vapeur à combustion directe

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108442914A (zh) * 2018-05-29 2018-08-24 吉林大学 一种用于油页岩原位裂解的系统及方法
CN108442914B (zh) * 2018-05-29 2023-04-25 吉林大学 一种用于油页岩原位裂解的系统及方法

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