EP3728511A1 - Method for exploiting an underground formation by injecting a fluid comprising an additive provided with magnetic nanoparticles - Google Patents
Method for exploiting an underground formation by injecting a fluid comprising an additive provided with magnetic nanoparticlesInfo
- Publication number
- EP3728511A1 EP3728511A1 EP18799558.4A EP18799558A EP3728511A1 EP 3728511 A1 EP3728511 A1 EP 3728511A1 EP 18799558 A EP18799558 A EP 18799558A EP 3728511 A1 EP3728511 A1 EP 3728511A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- additive
- adjuvant
- fluid
- effluent
- magnetic nanoparticle
- 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- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/588—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
- C09K8/032—Inorganic additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/524—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning organic depositions, e.g. paraffins or asphaltenes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/528—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning inorganic depositions, e.g. sulfates or carbonates
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/10—Nanoparticle-containing well treatment fluids
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/22—Hydrates inhibition by using well treatment fluids containing inhibitors of hydrate formers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/32—Anticorrosion additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
Definitions
- the present invention relates to the field of exploration and exploitation of an underground formation.
- the invention relates more particularly to the treatment of a fluid recovered from the underground formation.
- the invention particularly relates to the field of enhanced oil recovery (EOR) and the field of water treatment production.
- EOR enhanced oil recovery
- This adjuvant may take the form of organic molecules, such as polymers, copolymers and / or surfactants, etc. It can also take the form of inorganic molecules such as minerals (clays, barite, etc.), oxide particles (titanium oxides, iron oxides, etc.).
- adjuvant poses certain problems related in particular to the pollution by the adjuvant of the underground formation, to the pollution by the adjuvant of the water contained in the underground formation, pollution of water and / or hydrocarbons produced by the adjuvant, etc. It is therefore necessary to monitor the behavior of the adjuvant in the subterranean formation.
- the adjuvant used usually polymers, copolymers and surfactants, is found in the water produced, and if so, to remove this adjuvant from the water produced in order to achieve adequate water treatment.
- the present invention relates to a method of operating a subterranean formation, in which at least one fluid is injected.
- the fluid comprises at least one additive, the additive consisting of at least one adjuvant bonded to at least one magnetic nanoparticle.
- the additive of the produced effluent can be easily separated (without the need for complex equipment) and quickly (without the need for long separation steps).
- the invention relates to a method of operating a subterranean formation, in which at least one fluid is injected into said subterranean formation, said injected fluid comprising at least one additive.
- the following steps are carried out:
- At least one additive is synthesized by bonding at least one magnetic nanoparticle to at least one adjuvant of said fluid
- said adjuvant is an organic compound such as a polymer, a copolymer, or a surfactant.
- said adjuvant is a partially hydrolysed polyacrylamide HPAM or a terpolymer composed of acrylamide, acrylic aid and N-vinylpyrrolidone or acrylamido-tert-butylsulfonate (ATBS), a biopolymer such as xanthan or scleroglucan or a schizophyllane .
- said adjuvant is an anti-deposition aid, or a corrosion inhibitor or an anti-hydrate adjuvant.
- said recovered effluent is a production effluent of said subterranean formation comprising hydrocarbons, or a fluid taken from an aquifer of said subterranean formation, or a drilling fluid.
- said magnetic nanoparticle is coated with silica or alumina.
- said magnetic nanoparticle comprises a ferromagnetic core, in particular iron, preferably magnetite or maghemite.
- said additive is synthesized by grafting said magnetic nanoparticle onto the adjuvants or by incorporating said magnetic nanoparticle directly into the structure of the adjuvants or by coating the adjuvants and magnetic nanoparticles with another material.
- said magnetic nanoparticle is bonded to said adjuvant by a bond of a chemical nature, such as, for example, covalent bonds, or of ionic nature, or of a physical nature such as, for example, electrostatic or hydrophobic or Van der-type associations. Waals.
- said additive comprising said magnetic nanoparticle present in said effluent is separated by means of at least one magnet located in or near a pipe or a tank or a tank in which the effluent is located. recovered.
- said step of separating said additive comprising said magnetic nanoparticle comprises a preliminary step of separating the aqueous and organic phases of said effluent.
- the process comprises a final step of separating the aqueous and organic phases of said effluent.
- said magnetic nanoparticles and / or said labeled additive resulting from the separation step of said additive comprising said magnetic nanoparticle are recycled.
- the present invention relates to a method for operating an underground formation, in which at least one fluid is injected, the fluid comprising at least one additive.
- the following steps are carried out:
- the method may comprise an optional step:
- the injected fluid may be an aqueous fluid or an organic solvent. It may be a drilling fluid, water containing the synthesized additive, a fracturing fluid, a hydrocarbon-assisted recovery fluid, etc.
- the fluid additive consists of at least one adjuvant bonded to at least one magnetic nanoparticle
- the adjuvant of the injected fluid can take the form of organic molecules, such as polymers, copolymers (for example a polyacrylamide).
- the adjuvant may be a synthetic polymer such as for example polyacrylamide more or less hydrolysed: HPAM, a copolymer based on acrylamide and sulfonated monomer, or a terpolymer composed of acrylamide, acrylic acid and N - Vinylpyrrolidone or acrylamido-tertiobutylsulfonate (ATBS), or a natural polymer (biopolymer) such as xanthan, scleroglucan or schizophyllan.
- HPAM polyacrylamide more or less hydrolysed
- HPAM polyacrylamide more or less hydrolysed monomer
- ATBS N - Vinylpyrrolidone or acrylamido-tertiobutylsulfonate
- biopolymer such as xanthan, scleroglucan or schizophyllan.
- these polymers are adapted to be magnetically separable from the fluid in which it has been introduced in a manner that is easy to implement thanks to the grafting of one (or more) magnetic nano or microparticle (s) (such as iron oxide nanoparticles) on the polymer.
- magnetic materials is meant materials that may have permanent magnetization or that may exhibit magnetization when a magnetic field is applied thereto.
- Recovered effluent is understood to mean complex fluids comprising alone or in mixture production water, hydrocarbons, drilling fluids, fracturing fluids, waters of geological formations, etc.
- effluent refers to a complex fluid comprising alone or in combination the production water and hydrocarbons, which can be recovered by a producing well.
- the synthesized additive is an adjuvant of the fluid (especially a polymer) which has magnetic properties, and which, when present in the fluid, can be separated and isolated from it using its properties. magnetic, in particular by means of a magnetic field.
- This step of the process according to the invention consists in bonding at least one adjuvant of the fluid to at least one magnetic nanoparticle.
- the adjuvants are those used in the petroleum industry and may be of various chemical natures.
- the magnetic properties of the additive are provided by one or more magnetic nanoparticles which are bonded to the adjuvant.
- the bonds may be of a chemical nature, such as, for example, covalent or ionic bonds, or of a physical nature such as, for example, electrostatic or hydrophobic or Van der Waals combinations.
- the magnetic characteristics of the nanoparticles allow their attraction by application of a magnetic field, whatever the fluid in which they are. Thanks to the bond between the adjuvant and the nanoparticle or nanoparticles, the additive thus acquires magnetic properties.
- the additive if the additive is present in the recovered effluent, its magnetism allows a simple and rapid separation of the additive present in the recovered effluent (and allow a possible recycling of the additive).
- the term fluid adjuvant is any chemical compound that can be added to the fluid to enhance its role in the subsurface formation.
- the adjuvant may be an organic compound such as a polymer, a copolymer, or a surfactant, especially for an application of an EOR method.
- the adjuvant may be a partially hydrolyzed polyacrylamide HPAM or a terpolymer composed of acrylamide, acrylic acid and N-vinylpyrrolidone or ATBS, a biopolymer such as xanthan or scleroglucan or schizophyllane
- the adjuvant may also be an anti-deposition aid, or a corrosion inhibitor or an anti-hydrate adjuvant.
- Nanoparticles are objects whose size is typically between 1 and 500 nanometers. Magnetic nanoparticles are formed of a magnetic material or contain a magnetic material.
- the magnetic material is magnetite, which is iron oxide of formula Fe 3 O 4 , which has good magnetic properties
- the magnetic material is maghemite, which has good magnetic properties.
- Magnetic nanoparticles can be synthesized by any means known to those skilled in the art. They can be synthesized by various routes such as the coprecipitation of metal salts, in particular of ferrous and ferric salts, the thermal decomposition of organometallic compounds such as, for example, iron acetylacetonates or iron carboxylates. They can also be synthesized from microemulsions or by hydrothermal syntheses.
- magnetic nanoparticles synthesis, protection, functionnalisation and applications
- An-Hui Lu et al Angew. Chem. int. Ed. 2007, 46, 1222-1244 "or” magnetic iron oxide nanoparticles: synthesis, stabilization, vectorization, physicochemical characterization and biological application, S. Laurent et al., Chem. Rev. 2008, 108, 2064-21 10 ".
- the nanoparticles can be synthesized by coprecipitation of ferric and ferrous ions by addition of a base (sometimes called the Massart method), an example of such a method is described in the document "Bee, A .; Massart, R .; Nephew, S. Synthesis of very fine maghemite particles. J. Magn. Magn. Matr. 1995. 149 (1): 6-9 ".
- the nanoparticles can be purified and / or isolated by means of, for example, washing, centrifugation and filtration steps.
- the nanoparticles obtained can be isolated or maintained in the form of suspension in a liquid matrix.
- Example 1 Nanomagnetic MNPs-1 particles: The iron salts FeSO 4 and FeCl 3 are mixed in a molar ratio of 1: 2 in 100 ml of water at a temperature of concentration of 0.13 M iron ions. Trisodium citrate is added to the mixture in a molar ratio of 1% based on the total iron concentration. The mixture is stirred vigorously (280 rpm) for 30 minutes with a mechanical stirrer under an argon atmosphere. Then 6 ml of ammonium hydroxide are rapidly injected into the mixture and the reaction is continued for 1 hour at room temperature under argon atmosphere.
- Example 2 nanomagnetic MNPs-2 particles: This synthesis protocol is similar to the previous one except for the total concentration of iron which is 0.08 M and the addition of citrate which is made after 1 h of synthesis. The medium is then heated at 80 to 90 ° C for 30 minutes.
- Example 3 Nanomagnetic MNPs-3 particles: This synthesis protocol is similar to the previous one, with the exception of iron sulfate, which is replaced by the same molar amount of ferric chloride FeCl 2 . The FeCl 2 and FeCl 3 salts are mixed at a concentration of 0.08 M in iron ions.
- the magnetic nanoparticle may be coated with an inorganic layer, for example silica and / or alumina.
- the magnetic nanoparticle may be coated with an organic layer, for example a polymer.
- This coating optionally makes it possible to protect the iron oxide from any undesirable reaction, to promote the dispersion of the nanoparticles and also to facilitate the functionalization of the nanoparticle, that is to say the grafting of one or more chemical functions which will allow or promote the bond between the nanoparticle and the adjuvant of the invention such as for example a partially hydrolyzed polyacrylamide type HPAM polymer.
- This coating can be carried out by the Stober method described in particular in the document "Stober, W .; Fink, A .; Bohn, E. Controlled growth of monodisperse silica spheres in the micron size range. J. Colloid Interface Sci., 26 (1968), pp. 62-69 ".
- the magnetic nanoparticle comprises an iron core, for example magnetite or maghemite, covered with a coating which is a layer of silica.
- This type of nanoparticle is particularly suitable for grafting on partially hydrolysed polyacrylamide polymers (HPAM).
- HPAM partially hydrolysed polyacrylamide polymers
- This embodiment is particularly suitable for an EOR enhanced oil recovery process chemical, in which we will inject a formulation containing at least HPAM polymers "magnetic". Thus, when these additives will emerge with the effluent produced, they can be removed in a simple manner, by applying a magnetic field.
- the bond between the one or more nanoparticles and the polymeric adjuvant (s) may be carried out either by chemical grafting or by physical interaction.
- the grafting by chemical bonding can be carried out by means of a covalent bond.
- bonds can be created by reactions of specific functions judiciously chosen and available on magnetic nanoparticles and / or on polymeric additives.
- the grafting may for example be made from a magnetic nanoparticle whose surface carries amine functions. These functions can react chemically with functions carried by a partially hydrolysed polyacrylamide type polymer.
- the grafting of a magnetic nanoparticle whose surface bears amine functional groups on a partially hydrolysed polyacrylamide-type polymer may be carried out by the direct amidation reaction of a carboxylic function in its acidic form and the amine function carried by the nanoparticle.
- This reaction can also be carried out according to a well-known method which consists of reacting a carboxylic acid function with a carbodiimide such as 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide hydrochloride followed by reaction with sodium salt. N-hydroxysulfosuccinimide and the reaction with an amine function carried by the nanoparticle.
- a magnetic nanoparticle whose surface bears amine functions on a polyacrylamide-type polymer from a predominantly acrylamide-type polymer which is obtained by copolymerization in addition to acrylamide and optionally other monomers such as for example sodium acrylate or acrylic acid of an acrylate or an alkyl methacrylate such as methyl acrylate or ethyl acrylate.
- the grafting of the nanoparticle is then effected by an amidation reaction between the amine and ester functions introduced into the polymer.
- reaction schemes 1 and 2 These synthetic routes are illustrated by reaction schemes 1 and 2 below. On these NP representations illustrate the magnetic nanoparticles.
- the magnetic nanoparticles are distributed along the chain of a polymer if each nanoparticle has only one bond with the polymer, but a nanoparticle may be bonded to several polymer chains or several monomers. of the same polymer chain.
- each nanoparticle can be linked to several polymer chains, themselves linked to several nanoparticles thus forming an aggregate-type structure.
- reaction scheme 3 This synthetic route is illustrated by reaction scheme 3 below. On this NP representation illustrate the magnetic nanoparticles.
- This type of structure can also be obtained from magnetic nanoparticles whose surface is carrying unsaturated polymerizable functions, for example vinyls.
- This consists in carrying out the copolymerization of these nanoparticles with unsaturated monomers such as, for example, acrylamide, sodium acrylate or acrylic acid in the presence of a radical polymerization initiator such as a peroxide or an azo compound.
- unsaturated monomers such as, for example, acrylamide, sodium acrylate or acrylic acid
- a radical polymerization initiator such as a peroxide or an azo compound.
- the polymerizable unsaturated functional group carried by the nanoparticle participates in the polymerization or copolymerization of the monomer (s). This amounts to integrating one or more nanoparticles into the (co) polymerization of acrylamide-type monomers.
- each nanoparticle is bonded to several polymer chains according to a so-called star structure, ie nanoparticles distributed along the chain of a polymer, or aggregate-type structures, in which each nanoparticle can be linked to several polymer chains or several monomers of the same polymer, themselves linked to several nanoparticles.
- the bond between the magnetic nanoparticle (s) and the polymer adjuvant (s) can be achieved by physical interaction, it can be:
- the methods described above involve functionalizing the magnetic nanoparticles; the functionalization consists in either modifying the surface state of the magnetic nanoparticles or by coating the nanoparticle with a material having reactive functions, or by grafting chemical groups which will make it possible to establish a link with the chemical groups of the additive to be bonded either to carry out the synthesis of the magnetic nanoparticle or its coating simultaneously with the incorporation of the chemical functions necessary for the bonds with the polymeric additive.
- Functionalization methods have been well known since the late 1990s. The following articles describe these methods:
- Functionalization may consist of grafting organic ligands on the surface of the magnetic nanoparticles.
- the grafting of the ligands can be carried out on the metal oxide surface or if the magnetic nanoparticle is coated with an inorganic or organic layer, on the surface of the inorganic coating such as for example silica or on the surface of the coating organic.
- the coating may be a shell of a polymer or a copolymer having the desired properties, for example, hydrophilicity for use in aqueous media, or, conversely, hydrophobicity for uses in organic solvents .
- the ligands may be amine, carboxyl, amide, thiol, and the like.
- the functionalization of nanoparticles may be carried out by reaction of well-known grafting agents, such as 3-aminopropyltriethoxysilane or 3-mercaptopropyltriethoxysilane, which react with the hydroxyl functions, for example the silanol functions present on the surface of a silica coating.
- grafting agents can also react directly with the surface of a nanoparticle made of Fe 3 O 4 iron oxide by creating Fe-O-Si chemical bonds. This type of grafting is illustrated by the following reaction schemes 4 or 5.
- the adjuvant and the magnetic nanoparticle may be embedded in a coating in another material, for example silica and / or alumina.
- the formulation of the fluid to be injected is carried out with the additive.
- the type of fluid, the type of additives, and the amount of additives depend in particular on the function of the fluid and the underground formation (constitution, porosity, etc.).
- the injected fluid may be an aqueous fluid or an organic solvent. It may be a drilling fluid, water containing the synthesized additive, a fracturing fluid, a hydrocarbon-assisted recovery fluid, etc.
- the injected fluid may comprise a single additive.
- the injected fluid may comprise a plurality of adjuvants, for which a single adjuvant is made magnetic, for example the adjuvant that is the most polluting and that must be treated, or the adjuvant that may end up in the fluid recovered first or the adjuvant most impacting the water / hydrocarbon (oil) separation of the effluent on the surface.
- the injected fluid may comprise a plurality of additives.
- the fluid prepared with the additive is injected into the subterranean formation.
- the injection of a fluid into an underground formation can be carried out by any method known in the field of the petroleum industry. This may include an injection of a fluid into an injector well by means of a pumping system.
- This step consists in recovering an effluent, called recovered fluid, from the underground formation, which is used during the next separation step.
- the recovered fluid comprises complex fluids comprising alone or in mixture at least one of the hydrocarbons produced by a producing well, or the water produced by a producing well, or the water taken from the underground formation, in particular the water taken from a well. aquifer of the subterranean formation, or a drilling fluid raised to the surface during the drilling operation, etc.
- the effluent comprises at least a portion of the additive (s) synthesized in step 1) (magnetic renderings) of the injected fluid.
- step 1 the additive (s) synthesized in step 1) (magnetic renderings) contained in the recovered effluent are separated.
- the additive (s) synthesized in step 1) magnetic renderings contained in the recovered effluent are separated.
- the property magnetic nanoparticle magnetic the separation is achieved by the application of a magnetic field.
- the separation can be carried out by means of a magnet or a series of magnets.
- the magnet or series of magnets may be placed near a pipe or tank or tank in which the recovered effluent is located.
- the magnet or series of magnets may be located in a pipe or in a tank or tank.
- this separation step may comprise a preliminary step of separating the aqueous (water) and organic (oil) phases of the effluent.
- the aqueous phase can be treated for recycling (for example reinjected into the subterranean formation).
- the treatment of the aqueous phase then comprises the step of separating the additive or additives contained in the aqueous phase by magnetism.
- the step of magnetic separation of the additive (s) may precede the water / oil separation step to facilitate the latter.
- this step consists in separating the HPAM polymer. marked by the magnetic nanoparticles of the recovered effluent.
- Recycling can correspond to:
- the magnetic nanoparticles can be recycled for use again for the synthesis of additives. This step makes it possible to limit the cost of the process according to the invention, by limiting the quantity of magnetic nanoparticles used.
- the following steps can be implemented: the additives comprising the magnetic nanoparticles are recovered from the previous step;
- the magnetic nanoparticles are separated from the adjuvants, for example by a pyrolysis method
- the magnetic nanoparticles are regenerated to render them suitable for their use.
- the magnetic nanoparticles are recycled at the stage 1) of synthesis of the additives.
- this step may also include the regeneration and / or recycling of the additive. This makes it possible to limit the costs associated with the additive injected.
- the additive comprising at least one magnetic nanoparticle (that is to say the adjuvant-mNP assembly) which has been magnetically separated can be directly reused in the formulation of the EOR fluid injected into the underground formation. This is a direct recycling that requires the least amount of operations.
- the method of operating a subterranean formation according to the invention can be applied to all the processes for which a fluid, which comprises at least one additive, is injected into a subterranean formation, in particular for the exploration and production processes. exploitation of an underground formation.
- the operating method according to the invention can be used in an EOR enhanced oil recovery process, a process for treating the water produced, a drilling method, a method for producing oils and / or of bedrock gas, etc.
- EOR-C0 2 which consists of the injection of C0 2 into the reservoir
- chemical EOR which consists of injecting solutions of surfactants, microemulsions, or aqueous solutions of synthetic polymers, such as polyacrylamide (for example HPAM), or biopolymers such as xanthan or any other biopolymer (the injection of these polymer solutions is called "polymer flooding").
- One of the problems is the presence in the recovered effluent of injected additives. These impacts include the separation of the recovered effluent, the quality of the separated water and the quality of the separated oil, in addition to being a potential pollutant.
- the method according to the invention makes it possible to solve these problems.
- Hydraulic fracturing involves pumping under a very high pressure a fluid containing various additives (solid particles called propellants, polymers-polyacrylamide, ...-, clays, ...) so as to crack the rock.
- propellants solid particles
- polymers-polyacrylamide polymers-polyacrylamide
- clays a fluid containing various additives (solid particles called propellants, polymers-polyacrylamide, ...-, clays, ...) so as to crack the rock.
- propellants solid particles called propellants, polymers-polyacrylamide, ...-, clays, ...)
- a fluid For the drilling of a well, a fluid is injected which fulfills four functions which are: the raising of the rock cuttings, the maintenance in suspension of the cuttings during stops of circulation, the maintenance of the pore pressure at the right of the training as well as the cooling and lubrication of the drill tool.
- the drilling fluid contains several additives to fulfill these four functions such as viscosifiers, lubricants, defoamers, filtrate reducers, and the like.
- the dosage of each of the additives of the formulation of the drilling fluid is optimized so that this formulation has the desired properties.
- the additives can be either organic molecules, such as polymers, copolymers, associative polymers, surfactants, or inorganic particles (clays, barite, etc.).
- Such a method makes it possible to maintain the flow of hydrocarbons in the subterranean formation, by injecting a fluid comprising flow-enhancing additives, for example anti-scale additives, anti-corrosion additives, and anti-hydrate additives.
- flow-enhancing additives for example anti-scale additives, anti-corrosion additives, and anti-hydrate additives.
- anti-deposition additives are polymers (polyacrylates, polycarboxylates, etc.). These additives can be found in the effluent.
- the method according to the invention makes it possible to limit this pollution.
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Soft Magnetic Materials (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1762697A FR3075806B1 (en) | 2017-12-21 | 2017-12-21 | PROCESS FOR THE EXPLOITATION OF A SUBTERRANEAN FORMATION BY INJECTION OF A FLUID COMPRISING AN ADDITIVE PROVIDED WITH MAGNETIC NANOPARTICLES |
PCT/EP2018/081211 WO2019120771A1 (en) | 2017-12-21 | 2018-11-14 | Method for exploiting an underground formation by injecting a fluid comprising an additive provided with magnetic nanoparticles |
Publications (1)
Publication Number | Publication Date |
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EP3728511A1 true EP3728511A1 (en) | 2020-10-28 |
Family
ID=61599396
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP18799558.4A Withdrawn EP3728511A1 (en) | 2017-12-21 | 2018-11-14 | Method for exploiting an underground formation by injecting a fluid comprising an additive provided with magnetic nanoparticles |
Country Status (3)
Country | Link |
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EP (1) | EP3728511A1 (en) |
FR (1) | FR3075806B1 (en) |
WO (1) | WO2019120771A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN110776898B (en) * | 2019-11-22 | 2022-02-01 | 中国石油大学(华东) | Viscoelastic nano-magnetic fluid for improving crude oil recovery ratio of tight reservoir and preparation method thereof |
CN111253926B (en) * | 2020-02-27 | 2022-08-30 | 中国石油天然气股份有限公司 | Nano-magnetic fluid oil displacement fracturing fluid and preparation and use methods thereof |
Family Cites Families (4)
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US8801936B2 (en) * | 2006-11-09 | 2014-08-12 | ETH Zürich | Carbon coated magnetic nanoparticles and their use in separation processes |
WO2011063023A2 (en) * | 2009-11-17 | 2011-05-26 | Board Of Regents, The University Of Texas System | Determination of oil saturation in reservoir rock using paramagnetic nanoparticles and magnetic field |
US20150376493A1 (en) * | 2013-02-05 | 2015-12-31 | Board Of Regents, The University Of Texas System | Hydrophobic Paramagnetic Nanoparticles as Intelligent Crude Oil Tracers |
BR102015004125B1 (en) * | 2015-02-26 | 2020-12-15 | Petróleo Brasileiro S.A. - Petrobras | process for producing nanoparticles |
-
2017
- 2017-12-21 FR FR1762697A patent/FR3075806B1/en not_active Expired - Fee Related
-
2018
- 2018-11-14 EP EP18799558.4A patent/EP3728511A1/en not_active Withdrawn
- 2018-11-14 WO PCT/EP2018/081211 patent/WO2019120771A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
WO2019120771A1 (en) | 2019-06-27 |
FR3075806A1 (en) | 2019-06-28 |
FR3075806B1 (en) | 2019-12-20 |
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