ИССЛЕДОВАНИЕ ФИЛЬТРАЦИОННЫХ И РЕОЛОГИЧЕСКИХ СВОЙСТВ ПОЛИМЕРНОГО ГЕЛЯ ДЛЯ ПОВЫШЕНИЯ НЕФТЕОТДАЧИ ПЛАСТОВ

Narisu, Vladimir I. Erofeev, Lv Jinlong, Wang Wei

Результат исследований: Материалы для журналаСтатья

Выдержка

The relevance. Polymer flooding is widely used in practice in the development of oil fields. The high&concentration polymer solution has strong viscoelasticity, but with the increase in mass concentration of the polymer, the compatibility problem occurs between polymer molecules aggregate size and reservoir rock pore size during its practical application. Cr 3 + polymer gel based on intramolecular cross&lin& king has a smaller aggregate size and good compatibility with the reservoir, so it is relevant to study the effect of gel formation of Cr 3 + polymer gel and its influence factors. The main aim of the research is to study filtration and rheological properties of polyacrylamide&based aqueous gel with chromium ace& tate to enhance oil recovery. Methods: physical simulation of oil displacement and fluid filtration under reservoir conditions on a filtration unit, determination of vis& cosity of cross&linked polymer gel using the Brookfield DV&II viscometer, measuring the size of the molecular coil Dh in a Brookhaven BI&200SM light scattering system (Brookhaven Instruments Cop., USA), determination of viscoelasticity using the Harke10 rheometer. Results. Regulating the concentration of polymer, water solution salinity and the ratio of the polymer content and chromium (w (П/Cr 3+ )), one can obtain the Cr 3+ polymer gel system based on intramolecular cross&linking with a smaller molecular aggregate and high& er resistance confidence. After the reaction of intramolecular cross&linking of the polymer solution, on the one hand the viscoelasticity of the system is significantly improved and the oil displacement coefficient increased. On the other hand, the intramolecular crosslinking reaction reduces the flexibility of the polymer molecule aggregates, increases their rigidity, weaken their deformability in the process of passing through the pores, and enhance the retention ability in the high permeability layer. Cr 3 + polymer gel system not only has good injectability, it can also gradually reach a higher injection pressure, so it enlarges sweep volume effectively. In total, it is shown that the oil recovery coefficient of the polymer gel system is higher than the polymer solution.

Язык оригиналаРусский
Страницы (с-по)147-157
Число страниц11
ЖурналBulletin of the Tomsk Polytechnic University, Geo Assets Engineering
Том330
Номер выпуска4
DOI
СостояниеОпубликовано - 1 янв 2019

Отпечаток

Polymers
Oils
Gels
gel
polymer
Recovery
oil
Viscoelasticity
viscoelasticity
Polymer solutions
Chromium
aggregate size
chromium
Molecules
Viscometers
Rheometers
Oil fields
Formability
physical method
Polyacrylates

Keywords

  • Enhanced oil recovery
  • Intramolecular cross-linking of polymer molecules
  • Molecular coil size
  • Polymer gel
  • Resistance coefficient
  • Viscoelasticity

ASJC Scopus subject areas

  • Materials Science (miscellaneous)
  • Fuel Technology
  • Geotechnical Engineering and Engineering Geology
  • Waste Management and Disposal
  • Economic Geology
  • Management, Monitoring, Policy and Law

Цитировать

ИССЛЕДОВАНИЕ ФИЛЬТРАЦИОННЫХ И РЕОЛОГИЧЕСКИХ СВОЙСТВ ПОЛИМЕРНОГО ГЕЛЯ ДЛЯ ПОВЫШЕНИЯ НЕФТЕОТДАЧИ ПЛАСТОВ. / Narisu, ; Erofeev, Vladimir I.; Jinlong, Lv; Wei, Wang.

В: Bulletin of the Tomsk Polytechnic University, Geo Assets Engineering, Том 330, № 4, 01.01.2019, стр. 147-157.

Результат исследований: Материалы для журналаСтатья

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abstract = "The relevance. Polymer flooding is widely used in practice in the development of oil fields. The high&concentration polymer solution has strong viscoelasticity, but with the increase in mass concentration of the polymer, the compatibility problem occurs between polymer molecules aggregate size and reservoir rock pore size during its practical application. Cr 3 + polymer gel based on intramolecular cross&lin& king has a smaller aggregate size and good compatibility with the reservoir, so it is relevant to study the effect of gel formation of Cr 3 + polymer gel and its influence factors. The main aim of the research is to study filtration and rheological properties of polyacrylamide&based aqueous gel with chromium ace& tate to enhance oil recovery. Methods: physical simulation of oil displacement and fluid filtration under reservoir conditions on a filtration unit, determination of vis& cosity of cross&linked polymer gel using the Brookfield DV&II viscometer, measuring the size of the molecular coil Dh in a Brookhaven BI&200SM light scattering system (Brookhaven Instruments Cop., USA), determination of viscoelasticity using the Harke10 rheometer. Results. Regulating the concentration of polymer, water solution salinity and the ratio of the polymer content and chromium (w (П/Cr 3+ )), one can obtain the Cr 3+ polymer gel system based on intramolecular cross&linking with a smaller molecular aggregate and high& er resistance confidence. After the reaction of intramolecular cross&linking of the polymer solution, on the one hand the viscoelasticity of the system is significantly improved and the oil displacement coefficient increased. On the other hand, the intramolecular crosslinking reaction reduces the flexibility of the polymer molecule aggregates, increases their rigidity, weaken their deformability in the process of passing through the pores, and enhance the retention ability in the high permeability layer. Cr 3 + polymer gel system not only has good injectability, it can also gradually reach a higher injection pressure, so it enlarges sweep volume effectively. In total, it is shown that the oil recovery coefficient of the polymer gel system is higher than the polymer solution.",
keywords = "Enhanced oil recovery, Intramolecular cross-linking of polymer molecules, Molecular coil size, Polymer gel, Resistance coefficient, Viscoelasticity",
author = "Narisu and Erofeev, {Vladimir I.} and Lv Jinlong and Wang Wei",
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AU - Narisu,

AU - Erofeev, Vladimir I.

AU - Jinlong, Lv

AU - Wei, Wang

PY - 2019/1/1

Y1 - 2019/1/1

N2 - The relevance. Polymer flooding is widely used in practice in the development of oil fields. The high&concentration polymer solution has strong viscoelasticity, but with the increase in mass concentration of the polymer, the compatibility problem occurs between polymer molecules aggregate size and reservoir rock pore size during its practical application. Cr 3 + polymer gel based on intramolecular cross&lin& king has a smaller aggregate size and good compatibility with the reservoir, so it is relevant to study the effect of gel formation of Cr 3 + polymer gel and its influence factors. The main aim of the research is to study filtration and rheological properties of polyacrylamide&based aqueous gel with chromium ace& tate to enhance oil recovery. Methods: physical simulation of oil displacement and fluid filtration under reservoir conditions on a filtration unit, determination of vis& cosity of cross&linked polymer gel using the Brookfield DV&II viscometer, measuring the size of the molecular coil Dh in a Brookhaven BI&200SM light scattering system (Brookhaven Instruments Cop., USA), determination of viscoelasticity using the Harke10 rheometer. Results. Regulating the concentration of polymer, water solution salinity and the ratio of the polymer content and chromium (w (П/Cr 3+ )), one can obtain the Cr 3+ polymer gel system based on intramolecular cross&linking with a smaller molecular aggregate and high& er resistance confidence. After the reaction of intramolecular cross&linking of the polymer solution, on the one hand the viscoelasticity of the system is significantly improved and the oil displacement coefficient increased. On the other hand, the intramolecular crosslinking reaction reduces the flexibility of the polymer molecule aggregates, increases their rigidity, weaken their deformability in the process of passing through the pores, and enhance the retention ability in the high permeability layer. Cr 3 + polymer gel system not only has good injectability, it can also gradually reach a higher injection pressure, so it enlarges sweep volume effectively. In total, it is shown that the oil recovery coefficient of the polymer gel system is higher than the polymer solution.

AB - The relevance. Polymer flooding is widely used in practice in the development of oil fields. The high&concentration polymer solution has strong viscoelasticity, but with the increase in mass concentration of the polymer, the compatibility problem occurs between polymer molecules aggregate size and reservoir rock pore size during its practical application. Cr 3 + polymer gel based on intramolecular cross&lin& king has a smaller aggregate size and good compatibility with the reservoir, so it is relevant to study the effect of gel formation of Cr 3 + polymer gel and its influence factors. The main aim of the research is to study filtration and rheological properties of polyacrylamide&based aqueous gel with chromium ace& tate to enhance oil recovery. Methods: physical simulation of oil displacement and fluid filtration under reservoir conditions on a filtration unit, determination of vis& cosity of cross&linked polymer gel using the Brookfield DV&II viscometer, measuring the size of the molecular coil Dh in a Brookhaven BI&200SM light scattering system (Brookhaven Instruments Cop., USA), determination of viscoelasticity using the Harke10 rheometer. Results. Regulating the concentration of polymer, water solution salinity and the ratio of the polymer content and chromium (w (П/Cr 3+ )), one can obtain the Cr 3+ polymer gel system based on intramolecular cross&linking with a smaller molecular aggregate and high& er resistance confidence. After the reaction of intramolecular cross&linking of the polymer solution, on the one hand the viscoelasticity of the system is significantly improved and the oil displacement coefficient increased. On the other hand, the intramolecular crosslinking reaction reduces the flexibility of the polymer molecule aggregates, increases their rigidity, weaken their deformability in the process of passing through the pores, and enhance the retention ability in the high permeability layer. Cr 3 + polymer gel system not only has good injectability, it can also gradually reach a higher injection pressure, so it enlarges sweep volume effectively. In total, it is shown that the oil recovery coefficient of the polymer gel system is higher than the polymer solution.

KW - Enhanced oil recovery

KW - Intramolecular cross-linking of polymer molecules

KW - Molecular coil size

KW - Polymer gel

KW - Resistance coefficient

KW - Viscoelasticity

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