EP1859007A1 - Methode de traitement des reservoirs petroliers par injection de nanoparticules contenant un additif anti depots mineraux - Google Patents
Methode de traitement des reservoirs petroliers par injection de nanoparticules contenant un additif anti depots minerauxInfo
- Publication number
- EP1859007A1 EP1859007A1 EP06709256A EP06709256A EP1859007A1 EP 1859007 A1 EP1859007 A1 EP 1859007A1 EP 06709256 A EP06709256 A EP 06709256A EP 06709256 A EP06709256 A EP 06709256A EP 1859007 A1 EP1859007 A1 EP 1859007A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- polymer
- active polymer
- polycation
- nanoparticles
- particles
- 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- Withdrawn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
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- 125000003588 lysine group Chemical group [H]N([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])(N([H])[H])C(*)=O 0.000 description 1
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- MMNOTXXCQAFCLV-UHFFFAOYSA-N n,n-dimethylmethanamine;2-methyl-n-propylprop-2-enamide;hydrochloride Chemical compound [Cl-].C[NH+](C)C.CCCNC(=O)C(C)=C MMNOTXXCQAFCLV-UHFFFAOYSA-N 0.000 description 1
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- BHRKTJMAZMWXOS-UHFFFAOYSA-N propyl 2-methylprop-2-enoate;trimethylazanium;chloride Chemical compound [Cl-].C[NH+](C)C.CCCOC(=O)C(C)=C BHRKTJMAZMWXOS-UHFFFAOYSA-N 0.000 description 1
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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
- C09K8/52—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
- 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
- C09K8/536—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning characterised by their form or by the form of their components, e.g. encapsulated material
Definitions
- the present invention relates to a method of preventive treatment of the surroundings of a hydrocarbon exploitation well, and neighboring reservoir zones.
- it relates to the use of chemical additives encapsulated in the form of deformable nanoparticles and specific to the prevention of mineral deposits called "antiscale” additives. This is a “smart" preventive treatment of reservoir rock near wellbore.
- the invention is based on the idea of injecting in the porous and permeable medium nanoparticles containing an anti-deposition polymer ("antiscale”) in the aqueous phase, which are fixed in the porous medium, without appreciably reducing the permeability of the reservoir rock, and diffuse a continuous background of polymer in the presence of more or less salty water.
- antiscale anti-deposition polymer
- the present invention relates to a reservoir rock treatment method in which the following steps are carried out:
- nanometer-sized particles comprising in the form of a water-soluble, water-soluble polymer, an active anti-mineral deposit encapsulated either in a matrix to form a nanocomplex, or in a membrane to form a nanocapsule,
- a quantity of said particles is maintained in dispersion in a liquid phase; the dispersion is injected into the permeable rock;
- the active polymer is released on contact with salt water.
- the liquid phase can be: aqueous, organic, or a mixture of both.
- the particles may have a particle size sufficiently small so as not to clog the permeable rock during the injection of the nanoparticles.
- the particle size of the nanoparticles may be less than 1 ⁇ m, and preferably centered around 100 nm.
- the particles can be adapted to adsorb on the rock to be treated.
- the particles can be sufficiently deformable to improve the injectivity in a porous medium.
- the nanoparticles may be polycation / polyanion complexes, the polyanion being the active polymer, the cationic polymer, more or less crosslinked, or non-crosslinked, forming the matrix.
- the nanocapsules may be the result of interfacial polymerization within a nanoemulsion containing the active polymer.
- the active polymer may be chosen from at least one of the following polymers: polyphosphates and in particular orthophosphoric acid, organophosphorus compounds such as phosphoric acid esters, phosphonates and phosphinocarboxylic acids, polymers and synthetic copolymers based on at least one of the following monomers: acrylic acid, maleic vinylsulfonic acid, vinyl acetate, vinyl alcohol, acrylamide, and optionally comprising one or more phosphonate functions, polyaspartates, polysaccharides (such as carboxymethylinulin, carboxymethylcellulose).
- the active polymer of water-soluble type, can have a molecular mass of between 400 and 20000 Dalton.
- the polycation may be water-soluble, and selected from the following families: polyallylamine hydrochloride, chitosan, gelatin.
- the crosslinking of the polycation can be optimized to adjust the release conditions of the active polymer.
- the active polymer is a conventional anti-deposition polymer ("antiscale"), such as a polyacrylate, polyphosphate, phosphonate, polysulphonate, of water-soluble type, generally of relatively low molecular weight, of between 400 and 20000 daltons.
- antiscale conventional anti-deposition polymer
- the main inhibitors include:
- Organophosphorus compounds such as phosphoric acid esters, phosphonates and phosphinocarboxylic acids
- the particle size of the particles is sufficiently small relative to the permeability of the porous media in such a way that there is no risk of clogging the porous media during the injection of the nanoparticles.
- the permeability of the tank must not be significantly reduced.
- the particle size of the nanoparticles could be less than 1 ⁇ m and preferably centered on 100 nm.
- the nanoparticles can be advantageously deformable to facilitate their injection into porous media.
- the nanoparticles are retained, at least temporarily, in the porous medium by mechanical retention or, preferably, by adsorption to the wall.
- the nanoparticles can be loaded (for example cationic) or functionalized to adsorb at best in the porous medium.
- the anti-deposit active polymer can diffuse through the nanoparticle to act as a specific additive.
- the nanoparticles At the level of the release profile of the polymer, it is possible to adapt the nanoparticles to obtain diffusion at low concentration (of the order of 10 to 50 ppm) in salt water, for example a reservoir water.
- the nanoparticles can be either nanospheres, in which the "antiscale” active polymer is trapped in a more or less crosslinked polymer hydrogel, or in the form of nanocapsules, the active polymer
- antiscale being at least one of the constituents of the heart of the capsule surrounded by a membrane.
- one embodiment consists of the formation of nanocomplexes (hydrogel) polycation / polyanion, the polyanion being the active polymer "antiscale", the cationic polymer more or less crosslinked, or non-crosslinked, forming the matrix (gel ).
- a globally slightly cationic complex is formed in order to facilitate its adsorption on the porous medium. Examples, written below, consist of the formation of nano complexes by controlled precipitation of cationic and anionic polyelectrolytes.
- the size of the nanocomplexes is controlled by various parameters such as the molecular weight of the polymers, the ratio of the concentrations of the two polyelectrolytes used, the ionic strength, optionally the pH and optionally the degree of crosslinking of the polycation.
- the nanocapsules, comprising the water-soluble antiscale polymer can be obtained by different routes, in particular from techniques consisting in forming the membrane from a nanoemulsion (also called mini emulsion). Different possibilities for forming nanometric emulsions are possible.
- the membrane can be, for example, obtained by interfacial polymerization, such as polycondensation or polyaddition.
- the nanoemulsions can be obtained as follows:
- cationic polymers that can be used to complex inhibiting polymers, mention may be made of: tetraethylammonium propyl polymethacrylate, polyallylamine hydrochloride, chitosan, gelatin, or any other water-soluble cationic polymer.
- nanoparticles During storage and during injection, nanoparticles
- nanocapsules or nanospheres can be kept dispersed, either in aqueous phase or in organic phase.
- the following main functions are optimized: low level of the ionic strength, adequate pH, release inhibitor. It will be possible to advantageously optimize the crosslinking function of the cationic polymer in order to control and adjust the mode of delivery of the active polymer "antiscale".
- the dispersion in the organic phase may allow, on the one hand to have a longer storage stability, and on the other hand to minimize the risk of damage to the reservoir (vis-à-vis the hysteresis phenomena of saturation) when placing nanoparticles in the formation.
- the anti-settling polymer is a sodium polyaspartate (BAYPURE DS 100), a polymer with a molecular weight of approximately 2000 gmol 1 , supplied by Bayer.
- the polycation used was prepared by polymerization of trimethylammonium chloride propyl methacrylamide. Chemical formula of trimethylammonium chloride propyl methacrylate
- This type of polycation can be prepared at different average molecular weights, in particular about 10,000, 50,000 or 100,000 gmol -1 . Whatever the pH of the medium in which these polycations are, they are constantly positively charged.
- the critical molar ratio for the system was evaluated by turbidimetry for the three masses of the polycation, it is close to 1.6 and not equal to 1.
- the overall weight content of the two polymers is 1.5% in aqueous solution.
- the charge ratio was varied and the synthesis carried out at pH 10. Above the critical ratio, the solution is always clear regardless of the excess of the polycation. For load ratios close to the critical ratio the solution becomes cloudy, a polymer gel is formed. An excess of polycation in the system leads to the formation of a positively charged complex, dispersed in the solution and stabilized by electrostatic repulsions.
- Mass of the polycation The systems described in the literature most often relate to high mass polymers. Generally, interactions between heavy polyanions and polycations result in macroscopic phase separation even at low temperatures. The polyanion used, which is relatively light, does not systematically lead to phase separation in the presence of the polycation.
- the first parameter to take into account is the ionic strength of the medium. Knowing that the cohesion of the complex involves electrostatic interactions, a change in the salt concentration can disrupt the system, screen the charges of the polyelectrolytes and lead to the dissociation of the complex.
- the nano-complex may not be sufficiently resistant to the ionic strength. In contact with the medium of release, the complex is likely to dissociate too quickly. To improve this function, it is recommended to carry out a crosslinking of the cationic polymer.
- Example 2 Polyaspartate / Gelatin
- Type A gelatin can be used as another type of polycation. It is obtained by controlled hydrolysis of collagen derived from pigskin. It is formed of proteins and its molecular weight is poorly defined. It has a global pH-dependent charge with an isoelectric point close to 8. Below this threshold, its charge is globally positive, which makes it interesting for complexation with sodium polyaspartate.
- gelatin type A This polymer of natural origin is very slightly soluble in cold water but easily hydrates above 40 ° C. Its dissolution is therefore hot. By lowering the temperature, the gelatin has low temperature gelling properties and can be chemically cross-linked (glycine groups).
- Gelatin has an isoelectric point between 7 and 9. For a pH value below the isoelectric point, it will be positively charged. For pH values between 3 and 5, both electrolytes are sufficiently charged to complex. Gelatin offers the possibility of a chemical crosslinking which gives a certain rigidity to nano complexes.
- the crosslinking agent is glutaraldehyde. It reacts easily at room temperature by changing color. The aldehyde functions react with the amino functions of the lysine residues of the gelatin chain to result in a Schiff base.
- the synthesis is carried out at 40 ° C. in such a way that the gelatin is soluble in water, the system is then brought to 8 ° C.
- the crosslinking agent is added to the solution, after one hour of reaction at room temperature, the crosslinking is stopped by adding sodium bisulfite.
- the reaction must be carried out at a pH value making it possible to have a large number of functions -NH 3 available to the crosslinking reaction.
- Polyallylamine hydrochloride is a chemically crosslinkable synthetic polycation. This polymer is commercially available (Aldrich) and has a mass of 15,000 gmol -1 . It is pH dependent, the positive charges are borne by the ammonium ion. At basic pH a proton was liberated to give an amine -NH 2 . The presence of amine functions allows, as in the case of gelatin, chemical crosslinking.
- Chemical formula of Oohallylamine hydrochloride Chemical formula of Oohallylamine hydrochloride:
- the mass content of the polymers is 1.5%.
- the charge ratio (n7n ' ) studied varies between 0.3 and 2.5.
- the stability of the nano complexes is observed for a ratio> 1.7.
- the polyanion is that polyaspartate cited in Examples 1, 2 and 3.
- the polycation is chitosan.
- Chitosan is the main derivative of chitin.
- Chitin the natural polymer, is the most abundant polysaccharide on earth with cellulose. Its chemical structure results from the sequence of N-acetyl-D-glucosamine and D-glucosamine-linked repeating units ⁇ - (1-4).
- Chitin is an important structural element of the exoskeleton of arthropods (crabs, shrimps, insects, ...) and the endoskeleton of cephalopods (cuttlefish, ).
- Chitosan is derived from the deacetylation of chitin in an alkaline medium, but it also occurs naturally in a parcel.
- Chitin and chitosan are differentiated by the proportion of acetyl units present in the copolymer, also called degree of acetylation (denoted DA).
- degree of acetylation denoted degree of acetylation
- chitosan is usually limited to any chitin sufficiently N-deacetylated to be soluble in dilute acidic medium, there is no official nomenclature proposing a precise limit between the two terms.
- Chemical formula of chitin and chitosan Chitosan is a polyamine that forms salts in dilute acid solutions (except H 2 SO 4 at room temperature) to produce a polycation type polyelectrolyte.
- Chitosan is available commercially (Aldrich, Fluka, France Quitine, Marinard), however the DA and the molar mass are not known in all cases.
- a decrease in the value of the charge is observed after the crosslinking of the nano complexes. It goes from +35 mV for nano complexes to +3 mV after crosslinking.
- EXAMPLE 5 Carboxymethylinulin / Chitosan (CT)
- the polycation is the chitosan of Example 4.
- the polyanion is carboxymethylinulin (for example, the product Dequest PB11625 manufactured by SOLUTIA).
- carboxymethylinulin for example, the product Dequest PB11625 manufactured by SOLUTIA.
- concentrations for example, of 0.05% by weight of carboxymethylinulin and 0.25% and 0.5% by weight of chitosan allow the formation of nanocomplexes having a size slightly less than 100 nm and a positive overall charge.
- Example ⁇ Aquarite ® / chitosan (CT)
- the aquarite is a commercial compound of the company Rhodia, it is a vinylsulfonic-acrylic acid copolymer finished phosphonate.
- the polycation is the chitosan of Example 4.
- concentrations of, for example, 0.03% or 0.05% mass of Aquarite and 0.5% mass of chitosan allow the formation of nanocomplexes having a size slightly less than 100 nm and a positive overall charge.
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Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0501370A FR2881787B1 (fr) | 2005-02-10 | 2005-02-10 | Methode de traitement des reservoirs petroliers par injection de nanoparticules contenant un additif anti depots mineraux |
| PCT/FR2006/000267 WO2006084981A1 (fr) | 2005-02-10 | 2006-02-06 | Methode de traitement des reservoirs petroliers par injection de nanoparticules contenant un additif anti depots mineraux |
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| Publication Number | Publication Date |
|---|---|
| EP1859007A1 true EP1859007A1 (fr) | 2007-11-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP06709256A Withdrawn EP1859007A1 (fr) | 2005-02-10 | 2006-02-06 | Methode de traitement des reservoirs petroliers par injection de nanoparticules contenant un additif anti depots mineraux |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20080269083A1 (fr) |
| EP (1) | EP1859007A1 (fr) |
| FR (1) | FR2881787B1 (fr) |
| WO (1) | WO2006084981A1 (fr) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8183184B2 (en) * | 2006-09-05 | 2012-05-22 | University Of Kansas | Polyelectrolyte complexes for oil and gas applications |
| EP2126281A4 (fr) * | 2007-03-12 | 2014-08-27 | Univ Kansas | Complexes polyélectrolytiques servant d'agents gélifiants retardés pour applications de pétrole et gaz |
| US20090038799A1 (en) * | 2007-07-27 | 2009-02-12 | Garcia-Lopez De Victoria Marieliz | System, Method, and Apparatus for Combined Fracturing Treatment and Scale Inhibition |
| FR2942147B1 (fr) | 2009-02-17 | 2011-08-26 | Inst Francais Du Petrole | Systeme particulaire micro-ou nanometrique et son utilisation dans des procedes de traitement de puits petroliers |
| FR2984910B1 (fr) | 2011-12-21 | 2013-12-06 | IFP Energies Nouvelles | Procede de synthese d'un systeme nanoparticulaire de polyelectrolytes de charges opposees et utilisation pour le traitement de formations geologiques |
| GB201210034D0 (en) | 2012-06-07 | 2012-07-18 | Univ Leeds | A method of inhibiting scale in a geological formation |
| CA3069079C (fr) * | 2013-01-18 | 2022-04-19 | Conocophillips Company | Nanogels pour gelification retardee |
| CN112410010A (zh) | 2013-01-28 | 2021-02-26 | 科诺科菲利浦公司 | 延缓胶凝剂 |
| US11034883B2 (en) | 2013-01-28 | 2021-06-15 | The University Of Kansas | Low molecular weight polyacrylates for EOR |
| US9677386B2 (en) * | 2013-02-28 | 2017-06-13 | Halliburton Energy Services, Inc. | Methods of stabilizing weakly consolidated subterranean formation intervals |
| FR3003868A1 (fr) * | 2013-03-27 | 2014-10-03 | Poweltec | Traitement anti-depot des formations souterraines par injection d'inhibiteur de depot |
| US10851286B2 (en) | 2014-11-19 | 2020-12-01 | Conocophillips Company | Delayed gelation of polymers |
| US10472556B2 (en) | 2014-12-15 | 2019-11-12 | Total Sa | Nano-inhibitors |
| CN107709510A (zh) | 2015-06-10 | 2018-02-16 | 罗地亚经营管理公司 | 膦酸酯化的多糖和凝胶以及其制备方法 |
| US10392887B2 (en) | 2015-11-04 | 2019-08-27 | Halliburton Energy Services, Inc | Downhole payload release containers, method and system of using the same |
| WO2019013799A1 (fr) * | 2017-07-13 | 2019-01-17 | Baker Hughes, A Ge Company, Llc | Système de distribution d'agents de traitement de puits oléo-solubles et procédés d'utilisation de celui-ci |
| US12060523B2 (en) | 2017-07-13 | 2024-08-13 | Baker Hughes Holdings Llc | Method of introducing oil-soluble well treatment agent into a well or subterranean formation |
| US11111426B2 (en) * | 2018-05-30 | 2021-09-07 | Saudi Arabian Oil Company | In-situ salinity adjustment to improve waterflooding performance in oil-wet carbonate reservoirs |
| CN112943162B (zh) * | 2021-03-19 | 2022-04-15 | 西南石油大学 | 一种使边底水气藏气水界面人工隔板快速致密化的方法 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9611422D0 (en) * | 1996-05-31 | 1996-08-07 | Bp Exploration Operating | Coated scale inhibitors |
| WO2002012674A1 (fr) * | 2000-08-07 | 2002-02-14 | T R Oil Services Limited | Procede de distribution de produits chimiques dans un puits de petrole ou de gaz |
| GB0028269D0 (en) * | 2000-11-20 | 2001-01-03 | Norske Stats Oljeselskap | Well treatment |
| GB0219037D0 (en) * | 2002-08-15 | 2002-09-25 | Bp Exploration Operating | Process |
| DE10244504A1 (de) * | 2002-09-25 | 2004-04-08 | Capsulution Nanoscience Ag | Schnellfreisetzende Darreichungsform mit schwerlöslichem Wirkstoff |
-
2005
- 2005-02-10 FR FR0501370A patent/FR2881787B1/fr not_active Expired - Fee Related
-
2006
- 2006-02-06 WO PCT/FR2006/000267 patent/WO2006084981A1/fr not_active Ceased
- 2006-02-06 EP EP06709256A patent/EP1859007A1/fr not_active Withdrawn
- 2006-02-06 US US11/815,872 patent/US20080269083A1/en not_active Abandoned
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2006084981A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20080269083A1 (en) | 2008-10-30 |
| WO2006084981A1 (fr) | 2006-08-17 |
| FR2881787B1 (fr) | 2015-07-24 |
| FR2881787A1 (fr) | 2006-08-11 |
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