EP4467766A1 - Installation de dissolution de polymeres hydrosolubles sous forme de poudre - Google Patents

Installation de dissolution de polymeres hydrosolubles sous forme de poudre Download PDF

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Publication number
EP4467766A1
EP4467766A1 EP23305838.7A EP23305838A EP4467766A1 EP 4467766 A1 EP4467766 A1 EP 4467766A1 EP 23305838 A EP23305838 A EP 23305838A EP 4467766 A1 EP4467766 A1 EP 4467766A1
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EP
European Patent Office
Prior art keywords
polymer
cyclone
filter
container
top part
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.)
Granted
Application number
EP23305838.7A
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German (de)
English (en)
Other versions
EP4467766C0 (fr
EP4467766B1 (fr
Inventor
Flavien Gathier
Christophe RIVAS
Julien Bonnier
Cédrick FAVERO
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SNF Group
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SNF Group
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Publication date
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Priority to EP23305838.7A priority Critical patent/EP4467766B1/fr
Priority to ARP230101363A priority patent/AR129473A1/es
Priority to PCT/EP2024/063929 priority patent/WO2024245816A1/fr
Publication of EP4467766A1 publication Critical patent/EP4467766A1/fr
Application granted granted Critical
Publication of EP4467766C0 publication Critical patent/EP4467766C0/fr
Publication of EP4467766B1 publication Critical patent/EP4467766B1/fr
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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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/06—Arrangements for treating drilling fluids outside the borehole
    • E21B21/062—Arrangements for treating drilling fluids outside the borehole by mixing components
    • 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
    • E21B43/25—Methods for stimulating production
    • E21B43/26—Methods for stimulating production by forming crevices or fractures
    • 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
    • E21B43/25—Methods for stimulating production
    • E21B43/26—Methods for stimulating production by forming crevices or fractures
    • E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping

Definitions

  • the present invention relates to an installation for dissolving water-soluble polymers being presented in powder form. It also relates to a method for producing a water-soluble polymer solution implementing the installation.
  • Water-soluble polymers and, in particular, polyacrylamides are commonly used in large quantities in enhanced oil recovery (EOR) or for fracking operations or as an agent for reducing load loss for water transport networks.
  • EOR enhanced oil recovery
  • Document WO 2011/107683 describes a device (PSU - Polymer Slicing Unit) making it possible to both grind and disperse the polymer in powder form in dissolution water.
  • This device comprises a rotor with cutting blades and a stator with fine slots. Depending on their thickness, these slots allow the powder to be ground more or less finely. With slots of 200 microns, the dissolution is almost immediate, but the flow rate is low. Slots of around 700 microns make it possible to reduce the dissolution time by 30 minutes and to obtain very high concentrations, of around 20g/litre. These high concentrations make it possible to greatly reduce the size of the dissolution tanks positioned downstream from the PSU (also called maturation tanks) and metering pumps, and offer an advantage of a significant reduction in the corresponding investments.
  • PSU also called maturation tanks
  • the powders introduced into the wetting cone and therefore into the PSU grinding chamber described above is, on average, of 800 ⁇ m, the powders are easily dispersed. Furthermore, upstream, these powders can be transported (for example, Big Bag) and easily stored (for example, silo).
  • the dissolution of the powders must be as complete as possible in order to prevent injectivity problems in wells.
  • Document FR3063229 describes the use of a device for grinding water-soluble polymers in powder form, said grinding device being directly connected to the inlet of the wetting cone of a PSU device. In this configuration, the grinding device is subjected to a rapid heating of its constitutive elements which generates technical damage and leads to a thermal degradation of the polymer.
  • the problem that is proposed to solve by the invention is that of developing an installation for dissolving water-soluble polymers in powder form, a part of which is particularly fine, in practice less than 350 micrometres, not having the disadvantages mentioned above, in particular relating to the bulk, the safety of operators and the maintenance.
  • the problem of bulk is all the more significant than the installation is, in particular, intended to be used for enhanced oil and/or gas recovery operations or for off-shore fracking operations.
  • the Applicant has developed an installation for dissolving water-soluble polymers in powder form, in a closed circuit, advantageously operating in a dry atmosphere, involving a grinding device, a cyclone and filter assembly, positioned upstream from a water-soluble polymer particle hydration device.
  • the polymer in powder form is ground before entering into the hydration device, in a closed environment, without the operator being confronted with the handling of small particle size powders.
  • the installation according to the invention guarantees that the finest particles obtained after grinding the powder are not disseminated into the atmosphere, while ensuring an optimal dissolution of the rest of the particles, this all without requiring a maturation tank. Because the dissolution installation according to the invention has the advantage of not requiring the use of a maturation tank, the footprint is reduced, in particular for off-shore operations.
  • the installation duly ventilated does not lead to exothermal phenomena within the grinding device, which prevents mechanical breakdowns and degradation of the polymer.
  • the invention also relates to a method for producing a water-soluble polymer solution implementing the installation described above.
  • two other last aspects of the invention relate to an enhanced oil and/or gas recovery method and a method for fracking an oil or gas reservoir, these two methods comprising a step of dissolving water-soluble polymers in the installation of the invention.
  • the invention relates to an installation for dissolving water-soluble polymers in powder form, in particular for enhanced oil and/or gas recovery operations, or for fracking operations comprising:
  • the term "polymers" used in the plural means a homopolymer or a copolymer or a homopolymer and/or copolymer mixture, a copolymer meaning a polymer prepared from at least two different monomers. This is therefore a copolymer (i) of at least one anionic monomer and/or (ii) of at least one other cationic monomer and/or (iii) of at least one non-ionic monomer and/or (iv) of at least one zwitterionic monomer.
  • the preferred non-ionic monomer is acrylamide.
  • the preferred anionic polymer is acrylic acid or acrylamido-tertiary butyl sulphonic (ATBS) acid and their salts.
  • the preferred cationic monomer is quaternised or salified dimethylaminoethyl acrylate (ADAME).
  • water-soluble polymers this means a polymer or a polymer mixture which gives an aqueous solution without insoluble particles when it is dissolved while stirring for 4 hours at 25°C and with a concentration of 5 g.l -1 in deionised water.
  • the water-soluble polymer has an average molecular weight by weight greater than 500000 Daltons, more preferably greater than 1 million Daltons.
  • the water-soluble polymer most often, has an average molecular weight by weight less than 40 million Daltons, preferably less than 30 million Daltons.
  • the water-soluble polymer in powder form before grinding has a particle size of between 150 ⁇ m and 1500 ⁇ m.
  • the average particle size is around 800 ⁇ m.
  • the polymer particles After grinding and before introduction into the cyclone, the polymer particles have a particle size less than 500 ⁇ m, more preferably between 1 ⁇ m and 500 ⁇ m.
  • the particles coming from the grinding of the powder therefore have a size varying between 1 and 500 ⁇ m, which means that the particles are composed of particles of different sizes going from the finest to the coarsest.
  • the installation comprises at least 2 cyclones positioned in series.
  • the bottom part of the filter is connected to the top part of the last cyclone, such that the filter performs a second separation of the particles previously separated by the last cyclone.
  • the installation has at least two filters positioned in series.
  • the bottom part of the first filter is connected to the top part of the last cyclone.
  • the installation can comprise a succession of filters in series, the first of which is positioned downstream from the only cyclone or from the last cyclone, when these are mounted in series.
  • the installation can comprise several hoppers. These hoppers are configured to receive the polymer particles coming from the bottom parts of the cyclone(s) and of the filter(s). Such a configuration makes it possible to dissolve the total polymer quantity implemented at the start, except for the finest particles retained by the filters.
  • the installation according to the invention comprises as many metering devices as hoppers and each hopper is connected to one single metering device. However, the metering devices feed in their assembly, one single and unique hydration device. In other words, the installation therefore preferably comprises one single hydration device, whatever the number of metering devices.
  • the bottom parts of the cyclone(s) and of the filter(s) are advantageously each equipped with a transfer means, in practice, in the form of a transfer screw.
  • the cyclone(s), the filter(s) and the suctioning means are positioned above the assembly formed by the transport device, the grinding device, the hopper, the metering device and the hydration device.
  • the cyclone(s), the filter(s) and the suctioning means are arranged on a platform positioned above the assembly formed by the transport device, the grinding device, the hopper, the metering device and the hydration device.
  • the platform is accessible by a staircase or a ladder. It has openings configured to enable the passage of the means for connection of the top part of the cyclone to the grinding device and of the means for connection of the bottom parts respectively of the cyclone(s) and of the filter(s) to the hopper.
  • said installation comprises:
  • the containers are standardised, this implies that they are of the same size, i.e. the same volume, and therefore walls, each of the same surface area. It follows that the container A and the container B are superposed on one another over the whole surface, respectively of the roof of the container A and of the bottom of the container B.
  • the containers generally have standard dimensions and can carry a net weight of between 1 and 20 tonnes.
  • the containers preferably have a dimension of 6 to 12 metres x 2.4 metres x 2.6 metres high, excluding frame, and a weight of between 4 and 25 tonnes in movement to satisfy the local requirements.
  • the installation further comprises a container C configured for the storage of powder polymer, of general parallelepiped shape comprising side walls forming the large and small sides, a bottom and a roof, the container C being positioned on the container B.
  • the powder polymer is thus stored loose inside the container C.
  • the bottom of the container C comprises a means for moving the polymer, for example in the form of a horizontal screw.
  • the polymer is stored outside of the assembly formed by the container A and the container B, for example in Big Bags.
  • the container A has a hatch arranged in one of its side walls configured to enable the passage of the transport device so as to transport the powder polymer from the outside.
  • the transport device is presented in the form of a mechanical or pneumatic device feeding the grinding device from the outside of the container A from a polymer in powder form container (container example: Big Bag).
  • the constitutive elements of the installation advantageously have the following features, taken individually or in combination.
  • the filter or the series of filters is presented advantageously in the form of a hopper provided with a particle filter arranged in its upper part.
  • the grinding device is presented in the form of a hammer- or cutter-type grinding chamber.
  • the grinding device is a hammer-type grinding chamber.
  • this generally has a volume of between 20 and 100L, preferably between 30 and 50L.
  • the bottom parts of the cyclones and filters are, in a particular embodiment, equipped with a transfer screw enabling the passage of the polymer from the cyclone to the hoppers via a connection means, which is presented generally in the form of a conduit.
  • the metering screw preferably has a flow rate of between 120 and 2000kg/h and this can be adapted according to the size of the fields and of the quantity needs of water-soluble polymer to be injected according to the application.
  • the hydration device is connected at the outlet to a buffer tank which receives the aqueous water-soluble polymer solution coming from said hydration device.
  • the buffer tank is connected downstream from the installation, which means that it does not form part of the installation.
  • this comprises: a cone for wetting the polymer connected to a primary water supply circuit,
  • the wetting cone has a coating, giving it a surface tension of between 7.5 and 19.5mN.m -1 .
  • the hydration device has a dissolution capacity of between 5 and 3000kg/h of water-soluble polymer particles, adjustable according to the field and to the application, more commonly between 50 and 650kg/h of polymer particles.
  • PSU Polymer Slicing Unit
  • the hydration device comprises:
  • the Applicant has indeed discovered that the hydration device, when the inner walls of the wetting chamber have a surface tension which is a maximum of 4mN.m-1 lower to that of the inner surface of the cover helps effectively attenuate the polymer deposits on the internal or inner surface of the wetting chamber and the clogging of this wetting chamber. As a result, the number of mechanical breakdowns and service interruptions for cleaning and maintenance are reduced.
  • the difference between the surface tension of the internal face of the cover (TS2) and that of the lower face of the upper and lower parts of the wetting chamber and the L-shaped tube (TS1) is at most 4m N. m-' , advantageously equal to 4mN.m -1 .
  • the thickness of the wall in which the opening is formed emerging into the means for connection to the primary water supply circuit and the internal surface of said connection means have a surface tension equal to (TS1).
  • the surface tension (TS1) is between 7.5 and 19.5mN.m -1 and the surface tension (TS2) is between 11.5 and 23.5mN.m -1 .
  • the characteristic surface tensions of the invention are defined with the aid of a goniometer by measuring the contact angles of 3 solvents applied to the tested surface, the 3 solvents being water, diiodomethane and ethylene glycol at 25°C.
  • the installation further comprises a dehydration device.
  • the hydration device is arranged in the proximity of the air inlet of the grinder.
  • the hydration device is presented in the form of a closed circuit connecting the air extraction means to the air inlet of the grinder.
  • the invention also relates to a method for producing a water-soluble polymer solution implementing the installation described above and comprising the following steps:
  • the invention also relates to an enhanced oil and/or gas recovery method comprising the following steps:
  • a last aspect of the invention relates to a method for fracking an oil or gas reservoir comprising the following steps:
  • Figure 1 is a schematic representation of the installation according to the invention.
  • the installation according to the invention is an installation for dissolving water-soluble polymers in powder form, in particular for oil and/or gas recovery operations or for fracking operations.
  • the installation first comprises a zone (1) for storing polymer in powder form feeding a transport device (2) represented in the form of a conduit.
  • the polymer is stored loose in the storage zone (1) and is transited there via a lorry, for example.
  • the water-soluble polymer in powder form at the time of storing has an average particle size of around 800 ⁇ m.
  • the installation then comprises a grinding device (3) provided with an air inlet (3.1), which, as represented in the embodiment of figure 1, is connected to a dehydration device (3.2) by way of pipework (3.3).
  • the grinding device (3) is further provided with a means for connection (3.4) to the transport device (2), in practice in the form of a flange.
  • the grinding device in this example is a hammer-type grinding chamber and makes it possible to reduce the particle size of the polymer to a size less than 500 ⁇ m.
  • the installation then comprises a cyclone (5), having a bottom part (5.1) and a top part (5.2).
  • the top part (5.2) is connected by a means for connection, in the form of a conduit (4), to the grinding device (3).
  • the installation can comprise one single cyclone (5) (as represented in figure 1) or several cyclones (not represented), which in this case, are mounted in series, the top part of a cyclone being connected to the bottom part of the following cyclone.
  • the cyclones make it possible to separate the finer particles from the coarser particles after grinding and before passage into the filters.
  • each filter Downstream from the cyclone (5), one or more filters (7, 8) are mounted (two filters as represented in figure 1).
  • Each filter has, in the form of a tank provided with a bottom part (7.1, 8.1) and a top part (7.2, 8.2), the top part containing a filtering zone in the form of a dust filter (7.3, 8.3).
  • the bottom part (7.1) of the filter (7) is connected by way of a conduit (6.1) to the top part (5.2) of the cyclone (5), while the bottom part (8.1) of the filter (8) is connected by way of a conduit (6.2) to the top part (7.2) of the filter (7).
  • the filters make it possible to further optimise more the separation of the finest particles by retaining them in the dust filters (7.3, 8.3).
  • the installation further comprises an air extraction means (9) connected to the top part (8.2) of the last filter (8) by way of a conduit (6.3).
  • the cyclone (5), as well as the filters (7,8) have, connected to their bottom part, a screw for transferring the polymer, respectively (5.3, 7.4, 8.4).
  • the transfer screws are connected by way of a conduit (10.1, 10 2, 10.3) to a conduit (11) feeding one single and unique hopper (12).
  • the hopper (12) has, in this example, a volume of between 30 and 50L, and receives all the polymer particles obtained after separation in the cyclone (5) and the filters (7, 8).
  • the conduit (11) feeds the top part (12.1) of the hopper (12).
  • the bottom part (12.2) of the hopper (12) is itself equipped with a polymer metering device (13), in the form of a screw also, as represented.
  • the metering screw has, in practice, a flow rate of between 120 and 2000kg/h.
  • the installation then comprises one single and unique hydration device (14), fed with polymer by the metering device (13).
  • the hydration device has a water-soluble polymer particle dissolution capacity adjustable according to the field and the application, in practice between 50 and 650kg/h of polymer particles.
  • the hydration device (14) is schematically represented in figure 1 and corresponds, in this example, to the PSU described in document WO 2011/107683 or also WO 2016/156320 .
  • the hydration device (14) is connected at the outlet to a buffer tank (15), wherein the dissolved polymer is stored.
  • the injection fluid is prepared comprising the water-soluble polymer dissolved in the installation of the invention by mixing it with water or brine, and it is injected into the field by means of an injection pump (16).

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
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EP23305838.7A 2023-05-26 2023-05-26 Installation de dissolution de polymeres hydrosolubles sous forme de poudre Active EP4467766B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP23305838.7A EP4467766B1 (fr) 2023-05-26 2023-05-26 Installation de dissolution de polymeres hydrosolubles sous forme de poudre
ARP230101363A AR129473A1 (es) 2023-05-26 2023-05-29 Instalación para la disolución de polímeros hidrosolubles en forma de polvo
PCT/EP2024/063929 WO2024245816A1 (fr) 2023-05-26 2024-05-21 Installation de dissolution de polymères hydrosolubles sous forme de poudre

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP23305838.7A EP4467766B1 (fr) 2023-05-26 2023-05-26 Installation de dissolution de polymeres hydrosolubles sous forme de poudre

Publications (3)

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EP4467766A1 true EP4467766A1 (fr) 2024-11-27
EP4467766C0 EP4467766C0 (fr) 2025-10-29
EP4467766B1 EP4467766B1 (fr) 2025-10-29

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AR (1) AR129473A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011107683A1 (fr) 2010-02-16 2011-09-09 S.P.C.M. Sa Appareil perfectionne de dispersion de polymere hydrosoluble
US20140054042A1 (en) * 2012-08-27 2014-02-27 Rene Pich Centre For The Preparation Of Additives For Hydraulic Fracturing Operations And Hydraulic Fracturing Process Employing The Preparation Centre
US20160168955A1 (en) * 2015-09-11 2016-06-16 S.P.C.M. Sa Equipment And Method Enabling To Directly Use Powder Polymer In Hydraulic Fracturing
WO2016156320A1 (fr) 2015-04-02 2016-10-06 S.P.C.M. Sa Appareil perfectionne de dispersion de polymere hydrosoluble
CN106733071A (zh) * 2017-02-22 2017-05-31 青岛科技大学 一种制备自悬浮支撑剂的控制粒径粉碎造粒工艺
FR3063229A1 (fr) 2017-02-24 2018-08-31 S.P.C.M. Sa Equipement pour dissoudre des polymeres hydrosolubles ou hydrogonflants dans une solution aqueuse et utilisation de l'equipement
US20200129934A1 (en) * 2018-10-26 2020-04-30 David O. Trahan High efficiency powder dispersion and blend system and method for use in well completion operations

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011107683A1 (fr) 2010-02-16 2011-09-09 S.P.C.M. Sa Appareil perfectionne de dispersion de polymere hydrosoluble
US20140054042A1 (en) * 2012-08-27 2014-02-27 Rene Pich Centre For The Preparation Of Additives For Hydraulic Fracturing Operations And Hydraulic Fracturing Process Employing The Preparation Centre
WO2016156320A1 (fr) 2015-04-02 2016-10-06 S.P.C.M. Sa Appareil perfectionne de dispersion de polymere hydrosoluble
US20160168955A1 (en) * 2015-09-11 2016-06-16 S.P.C.M. Sa Equipment And Method Enabling To Directly Use Powder Polymer In Hydraulic Fracturing
CN106733071A (zh) * 2017-02-22 2017-05-31 青岛科技大学 一种制备自悬浮支撑剂的控制粒径粉碎造粒工艺
FR3063229A1 (fr) 2017-02-24 2018-08-31 S.P.C.M. Sa Equipement pour dissoudre des polymeres hydrosolubles ou hydrogonflants dans une solution aqueuse et utilisation de l'equipement
US20200129934A1 (en) * 2018-10-26 2020-04-30 David O. Trahan High efficiency powder dispersion and blend system and method for use in well completion operations

Also Published As

Publication number Publication date
EP4467766C0 (fr) 2025-10-29
AR129473A1 (es) 2024-08-28
EP4467766B1 (fr) 2025-10-29

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