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WO2015005890A1 - Composition pour le décolmatage et le nettoyage d'une zone en fond de sondage dans des formations saturées en huile et gaz - Google Patents

Composition pour le décolmatage et le nettoyage d'une zone en fond de sondage dans des formations saturées en huile et gaz Download PDF

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Publication number
WO2015005890A1
WO2015005890A1 PCT/UA2014/000073 UA2014000073W WO2015005890A1 WO 2015005890 A1 WO2015005890 A1 WO 2015005890A1 UA 2014000073 W UA2014000073 W UA 2014000073W WO 2015005890 A1 WO2015005890 A1 WO 2015005890A1
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WO
WIPO (PCT)
Prior art keywords
oil
composition
saa
water
gas
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.)
Ceased
Application number
PCT/UA2014/000073
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English (en)
Inventor
Ihor HUBYCH
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.)
"SPK-GEO" LLC
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"SPK-GEO" LLC
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Filing date
Publication date
Priority claimed from UAU201308732U external-priority patent/UA86111U/uk
Priority claimed from UAA201312763A external-priority patent/UA108793C2/uk
Application filed by "SPK-GEO" LLC filed Critical "SPK-GEO" LLC
Publication of WO2015005890A1 publication Critical patent/WO2015005890A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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

Definitions

  • the present invention relates to the oil and gas producing industry, and in particular to the complex composition designed to be used for restoration of the productive oil and gas wells having bottomhole zones mudded by colmatation with the formation water, condensate, or swelling of the clay rocks, resin-asphaltene (RAC) and paraffin components (RAPC).
  • RAC resin-asphaltene
  • RAPC paraffin components
  • the increase of the production of the oil, gas, and gas condensate depends substantially on the operation efficiency of the existent fond of productive wells.
  • an important part of the fond of productive wells operates at the levels considerably lower of their potentials.
  • One of the basic reason of this challenge is a technology-related factor induced by high water saturation of a bottomhole formation zone (BFZ) .
  • Premature stoppage of a well can be caused not only by liquid fluids which accumulate on the well bottom, but also through sand- clay plugs which arise and decrease filtration properties of a formation in the bottomhole zone, leading to the loss of reservoir energy at the movement of fluids from the reservoir into the well, and decreasing a hydrocarbon extraction level.
  • a complicated character of c olmatation of a productive formation suggests that solving a problem of increasing of well debits and the achieving the necessary extraction rates is not possible without a wide complex of physicochemical methods for influencing on a bottomhole formation zone.
  • RU, 2137796 discloses the composition for removal of RAPC, which in eludes SAA mixture: oxyethylated alkylphenols, oxyethylated higher alcohols and sulfonated products.
  • SAA mixture oxyethylated alkylphenols, oxyethylated higher alcohols and sulfonated products.
  • a drawback of this known composition is a limited application sphere wh ich is directed only to a n arrow part of colmatation problems, and especially is low efficient in the case of colmatation with mineral particles.
  • RU, 2200831 is related to the composition for treating a BFZ, which comprises a SAA mixture, an emulsion of an anion type polymer, and the rest - water.
  • a significant disadvantage of that composition is connected also with low efficiency in the case of colmatation of a productive formation with mineral particles.
  • compositions for decolmatation of wells are disclosed in RU,2257468.
  • This composition comprises hydrochloric acid, diammonium phosphate and a solvent; and, in addition, contains SAA and hydrofluoric acid.
  • SAA the composition can comprise its nonionogenic cation-active and anion-active species.
  • a solvent it uses methyl, ethyl or isopropyl alcohols, and a water-methanol fraction.
  • the present invention is aimed to improve a composition for decolmatation and cleaning a bottomwell zone of an oil and gas saturated formation by means of imparting to the composition a complex of properties which provide restoration of well operation and increase of the hydrocarbon extraction level.
  • the present invention aims at providing an improved composition for decolmatation and cleaning a bottomwell zone of an oil and gas saturated formation which comprises nonionogenic SAA such as poly glycosides and/or ethoxylated higher C8 - CI 8 alcohols, and/or fatty acid amides; ionogenic SAA such as alkylamides and/or fatty acid cocoamides; mineral and/or organic acid; potassium and/or sodium salts, and/or ammonium salts; II and III valent metal salts which are capable to decrease a clay swelling in a formation zone, and water ,
  • nonionogenic SAA such as poly glycosides and/or ethoxylated higher C8 - CI 8 alcohols, and/or fatty acid amides
  • ionogenic SAA such as alkylamides and/or fatty acid cocoamides
  • mineral and/or organic acid potassium and/or sodium salts, and/or ammonium salts
  • II and III valent metal salts which are capable to decrease
  • a ratio of said components being corresponded to the results of modeling the processes of colmatation of oil displacement, obtained before and after treating of the model of the test core and formation fluids with an appropriate composition.
  • cocamid diethanolamin cocamid monoethanolamin or cocamid triethanolamin may be used.
  • the ionogenic SAA represented by fatty acid alkylamide and cocoalkylamide salts may be used, in addition, as corrosion inhibitors.
  • hydrochloric acid may be preferably used and as organic acid - acetic acid.
  • composition of the invention may further contains a solvent of the RAC in the amount of 0.1 - 30.0 wt %.
  • the composition contains a light oil selected from the group consisting of benzine , kerosene, diesel oil, and n-methyl-2-pyrrolidone.
  • the components of the composition should be taken at the following ratios, % by weight :
  • a key position in creating of a new composition is a selection of an SAA mixture possessing high emulsifying properties for the water-oil system, where with its participation both direct and inverse emulsions are formed.
  • This aspect is very significant, since in the operations with oil and gas saturated formations the process of emulsification of the system is of great importance, inasmuch as it is just this process which, firstly, improves an access of the components of the composition to a swollen clay and, secondly, allows to form, from a complex multi phase system ( gas-oil, including RAP C - wa ter), a homogeneous mobile emulsion which further is removed from BFZ for cleaning the letter.
  • gas-oil including RAP C - wa ter
  • Fig. 1 is a scheme of the effect of the composition of the invention on a productive formation:
  • Fig. 2 dynamics of restoration of the effective gas permeability over time after action of the composition of the invention on a reservoir model which contained 18% of the residual water and 54 % of a condensate;
  • Fig. 5 precipitation of the resin-asphaltene and paraffin components in the PST tubes during oil extraction.
  • Fig. 9 dynamics of restoration of the effective permeability of the oil-saturated model at modeling the cleaning of the bottomhole zone by means of the composition of the invention.
  • Fig. 10 mixing of the composition with kerosene in the tanks of CA-320 aggregate before bringing these components into a well.
  • Fig. 11 the debit of the heavy oil on H-l well in Carpathians before and after treatment of the colmated oil-saturated reservoir by means of the composition of the invention under the name of "SPK GIOKIS".
  • the author in this work, used an SAA mixture to form both the direct and the inverse emulsions.
  • the dispersed exterior phase is a hydrocarbon liquid (oil or gas-condensate), while the dispersed interior phase is the water of any grade of salinity.
  • the most effective and universal emulsifiers for the inverse emulsions are the nitrogen-containing SAA.
  • the polyglycosides and oxyethylated C 8 -C 18 alcohols were used.
  • Choice of the SAA for the composition of the invention was fulfilled in such a manner that the new formed composition: 1 - possesses solubilization and wetting properties; 2 - effectively emulsifies both the direct (oil in water) and inverse (water in oil) emulsions, which are formed at cleaning a productive formation; 3 - has hydrotrops to improve the solubility of an oil in water and to prevent separation of emulsions.
  • a composition of nonionogenic and ionogenic SAA has been created, which possessed high washing properties and foaming capacity even at water salinity of 200 g/1, in contrast to the known compositions .
  • RAPC n-methyl- 2-pyrrolidone
  • composition of the invention is a high mineralization of its salt components which contain uni- and/or di-, and/or trivalent cations which allow to decrease dimensions of the boundary diffusion layer in clay minerals and hence their swelling.
  • composition of the invention contains organic and/or mineral acids, the aim of which is coagulation of clay, dilution of carbonate minerals and mixing the new-formed emulsions due to gassing.
  • the claimed composition restores the gas permeability and improves the filtration-capacitance parameters of a reservoir.
  • the restoration of the gas-permeability of the model, colmatated with condensate, under the action of the composition amounts to 84 % based on the start value before colmatation.
  • the composition has restored the permeability of the capillary pores, the content of which was more than 50 %, what together with supercapillary pores gave nearly 80 % of the porous space of the model (Fig. 3).
  • a practical value of the present invention consists in that, while having solved the problems described above, the present invention has enabled to create an effective mechanism of cleaning of the bottomhole zone from the RAPC, condensate, process water and reservoir water with the aim to restore the well operation, what first of all concerns the heavy oils.
  • composition comprises as SAAs a mixture of nonionogenic SAAs, including polyglycosides (PG) which are characterized by a high foaming capacity either in a salt water or in the presence of the condensate, what allows to combine the process of elimination of clay swelling with the cleaning of the bottomhole zone from the condensate and mixture of process water with reservoir water or filtrate.
  • PG polyglycosides
  • the residual oil was extra-displaced with the composition of the invention followed by the extra-washing off with a solution, which contained 20 % of kerosene and 80 % of the composition, and the final displacement in a filtration plant.
  • the oil displacement index was near 25 %.
  • composition of the invention As a consequence of the actions of the composition of the invention there has been achieved a nearly twice restoration of the phase permeability as compared to the initial one (6.1 mD), what is a very positive effect for the oil extraction process, and especially for the high-viscosity oils.
  • the main advantage of the composition of the invention is its complex effect on the productive formation.
  • the composition allows to eliminate the influence of all main factors which cause a colmatation of the reservoir and lead to a decrease of the well debit, namely:
  • the main question is to provide an effective emulsification of a system, because it is it that assists the access of reagents to the swollen clay and, secondly, enables to involve all the components of the system, including RAC and RAPC, into the emulsification process for the creation of a homogeneous mobile phase, and hence enables in the following to clean, with a sufficiently high quality, the bottomhole zone from colmatants by means of removal the latter from the reservoir.
  • SAAs for the composition of the invention was fulfilled in accordance with the following requirements: solubilization and wetting (polyglycosides); an emulgator of the direct emulsion (oil in water), which is formed at the beginning of the treatment of the reservoir (oxyethylated alcohol); an emulgator of the inverse emulsion (water in oil), which is formed at deeper cleaning of reservoir (amides, fatty acid alkylamides); improvement of the solubility of the oil in water, and prevention of the separation of emulsions - hydrotrops (sodium alkylaminodipropionate or/and sodium cocoiminodipropionate).
  • hydrotrops mentioned above are ionogenic SAAs, which in a mixture with nonionogenic SAAs exhibit a synergic effect, that enables to achieve a high degreasing (oil-removing) capability.
  • hydrotrops due to use of the latter we have got a possibility to refuse partially from the classic corrosion inhibitors [8] because they realize their function.
  • RAPC solvents of RAPC, such as light oils (benzine or/and kerosene, or/and diesel oil) or/and also n-methyl-2-pyrrolidone.
  • light oils benzine or/and kerosene, or/and diesel oil
  • n-methyl-2-pyrrolidone these components are added into the composition directly on the well when mixing in the industrial tanks of CA-320 aggregate (Fig. 10).
  • a carbonic acid which promotes the mobility of RAC and allows to substantially increase the oil debits in the wells under research.
  • the next feature of the present invention is the mechanism of its functioning. In view of the absence of a possibility to mix reagents in a productive formation, this operation was fulfilled using an acid which not only coagulated the clay, but by means of the boiling gassing, bubbled the system and favored to the mixing of the components, and hence to their effective emulsification.
  • the offered solution enables: 1 - to remove the clay mud from the bottomhole zone of the formations which are represented by the terigene sand-clay collectors or by those that are colmated with mineral particles of drilling solution; 2 - to remove condensed RAPCs from the BFZ; 3 - to clean the bottomhole zone collector, flooded with a washing liquid filtrate or dropped condensate.
  • composition of the invention may be used in the following ratios, in weight percents:
  • Solvent of RAC 0.1 - 30.0 Light oil (benzine or/and kerosene or/and diesel oil) or/and also n-methyl-2-pyrrolidone
  • the present invention is elucidated by a method for making the claimed composition and by the achieved indices of restoration of effective well operation.
  • composition was made in a reactor, filled up with water, at temperature 30 - 40 °C, while stirring. Then metal salts were added and brought up to a complete dissolution state. Obtained solution was being homogenized for 20 - 30 minutes, after which a SAA mixture was entered, and homogenization was being maintained for another 20 minutes. Into the formed mixture, an acid or mixture of acids was added, homogenization of the mixture continued for 20 minutes, and then the mixture was transferred into the tares to transport it up to the wells.
  • the obtained product was a liquid of yellow to light-brown color and had the density of 1.05 - 1.10 g/cm .
  • Storage up to 1 year in a plastic or metal tare.
  • Storage temperature from -10 °C to +50 °C.
  • the modeling of the oil-extraction process has enabled to restore the phase permeability of the reservoir almost twice as compared to the initial one (6.1 mD), what is a highly positive feature for an oil-extraction process.
  • the modeling the cleaning process with decolmatation of the gas-saturated formations has shown that treatment of the formations by means of the claimed compos ition i s more effec tive, than by means of hydrochloric acid which was used earlier.
  • the gas permeability of the model after treating with the claimed composition h as increased o n the third day fro m 0. 7 to 2 .6 mD (Fig. 4), that is else in 3.7 times as compared to HCT; from the initial value (0.2 mD) for the gas-permeability model which was colmated by swelling the clay species, it increased in 13 times.
  • Embodiments of making the composition for cleaning the heavy oil formations contained the components in the following ratios, wt %:
  • alkylaminodipropionate 0.5 - 1.0 organic acid 0.1 - 5.0 calcium and/or barium and/or iron chlorides 2.0 - 20.0 water the rest
  • Embodiments of making the composition for cleaning the tanks, engines or metal surfaces from oil products contained components in the following ratios, wt %:
  • Fig. 7 Modeling of the process of cleaning the objects from oil pollution is exhibited by the experiment illustrated by Fig. 7, where is represented an example of cleaning an oil-saturated formation from a heavy oil.
  • composition for decolmatation and cleaning the bottomwell zone of oil- and gas-saturated formations enables to realize such a

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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)
  • Detergent Compositions (AREA)

Abstract

Cette invention concerne l'industrie de la production pétrolière et gazière, et en particulier une composition complexe conçue pour restaurer le fonctionnement des puits de pétrole et de gaz comportant des zones en fond de sondage embouées par colmatage suite à la formation d'eau, de condensats, ou au gonflement des roches argileuses, des résines-asphaltènes et des composants paraffiniques. Le but de la présente invention est d'améliorer une composition pour le décolmatage et le nettoyage de la zone en fond de sondage dans des formations saturées en huile et gaz en conférant à la composition un complexe de propriétés qui permettent la restauration du fonctionnement du puits et l'accroissement du niveau d'extraction des hydrocarbures. La composition revendiquée comprend des SAA non ionogènes : polyglycosides et/ou alcools supérieurs C8-C18 éthoxylés, et/ou amldes d'acides gras ; des SAA ionogènes : alkylamides et/ou cocoamides d'acides gras, acide inorganique et/ou organique, sels de potassium et/ou sodium, et/ou sels d'ammonium, sels métalliques bi et tri-valents, qui sont capables de réduire le gonflement de l'argile dans la zone de formation, et l'eau, les rapports desdits composants correspondant au niveau le plus élevé de décolmatage et de nettoyage de ladite zone en fond de sondage.
PCT/UA2014/000073 2013-07-11 2014-07-10 Composition pour le décolmatage et le nettoyage d'une zone en fond de sondage dans des formations saturées en huile et gaz Ceased WO2015005890A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
UAU201308732 2013-07-11
UAU201308732U UA86111U (uk) 2013-07-11 2013-07-11 Композиція для декольматизації та розглинізації привибійної зони нафтогазонасичених пластів
UAA201312763A UA108793C2 (uk) 2013-11-01 2013-11-01 Композит з декольматації і очистки привибійної зони нафтогазонасичених пластів для підвищення ефективності вилучення вуглеводневих флюїдів
UAA201312763 2013-11-01
UAA201407699 2014-07-08
UA201407699 2014-07-08

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12325821B2 (en) 2022-07-12 2025-06-10 Secure Specialty Chemicals Corp. Lubricant blends and methods for improving lubricity of brine-based drilling fluids

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4008768A (en) * 1975-03-20 1977-02-22 Mobil Oil Corporation Oil recovery by waterflooding employing multicomponent surfactant systems
WO1993004265A1 (fr) * 1991-08-14 1993-03-04 Chevron Research And Technology Company Procede et composition servant a ameliorer la recuperation de petrole
EP0892039A1 (fr) * 1997-07-18 1999-01-20 The Procter & Gamble Company Compositions de nettoyage liquides
RU2137796C1 (ru) 1998-08-03 1999-09-20 Товарищество с ограниченной ответственностью - Фирма "Самшит" Состав для удаления асфальтено-смолистых и парафиновых отложений
WO2001042387A1 (fr) * 1999-12-10 2001-06-14 Integrity Industries, Inc. Micro-emulsions a base d'acides
RU2200831C1 (ru) 2001-10-04 2003-03-20 Общество с ограниченной ответственностью "Дельта-пром" Состав для обработки призабойной зоны пласта
RU2257468C1 (ru) 2004-03-23 2005-07-27 Открытое акционерное общество "Татнефть" им. В.Д. Шашина ОАО "Татнефть" им. В.Д. Шашина Состав для разглинизации призабойной зоны пласта
WO2006104711A2 (fr) * 2005-03-29 2006-10-05 Dyer Richard J Procede d'elimination simultanee d'asphaltine et/ou de paraffine et de paraffine brute en provenance de puits de petrole
JP2011225467A (ja) * 2010-04-16 2011-11-10 Kao Corp 皮膚洗浄剤組成物

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4008768A (en) * 1975-03-20 1977-02-22 Mobil Oil Corporation Oil recovery by waterflooding employing multicomponent surfactant systems
WO1993004265A1 (fr) * 1991-08-14 1993-03-04 Chevron Research And Technology Company Procede et composition servant a ameliorer la recuperation de petrole
EP0892039A1 (fr) * 1997-07-18 1999-01-20 The Procter & Gamble Company Compositions de nettoyage liquides
RU2137796C1 (ru) 1998-08-03 1999-09-20 Товарищество с ограниченной ответственностью - Фирма "Самшит" Состав для удаления асфальтено-смолистых и парафиновых отложений
WO2001042387A1 (fr) * 1999-12-10 2001-06-14 Integrity Industries, Inc. Micro-emulsions a base d'acides
RU2200831C1 (ru) 2001-10-04 2003-03-20 Общество с ограниченной ответственностью "Дельта-пром" Состав для обработки призабойной зоны пласта
RU2257468C1 (ru) 2004-03-23 2005-07-27 Открытое акционерное общество "Татнефть" им. В.Д. Шашина ОАО "Татнефть" им. В.Д. Шашина Состав для разглинизации призабойной зоны пласта
WO2006104711A2 (fr) * 2005-03-29 2006-10-05 Dyer Richard J Procede d'elimination simultanee d'asphaltine et/ou de paraffine et de paraffine brute en provenance de puits de petrole
JP2011225467A (ja) * 2010-04-16 2011-11-10 Kao Corp 皮膚洗浄剤組成物

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12325821B2 (en) 2022-07-12 2025-06-10 Secure Specialty Chemicals Corp. Lubricant blends and methods for improving lubricity of brine-based drilling fluids

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