Novel preformed gel particles with controllable density and its implications for EOR in fractured-vuggy carbonated reservoirs

Jin, Fang; Jiang, Tingting; Varfolomeev, Mikhail A.; Zhao, Haiyang; He, Long; Jiao, Baolei; Du, Daijun; Xie, Quan

doi:10.1016/j.petrol.2021.108903

Cited by 7 publications

(7 citation statements)

References 33 publications

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“…The AMPS/AM microgel particles could effectively block the high permeability area by swelling in the pore, improving the sweep efficiency of the injection of water, and increasing the oil displacement efficiency of the low permeability area by the fluid diversion. 18,28 As can be seen from Figure 12, under the permeabilities of 3259.5 and 354.6 mD, the oil recovery factor of the highpermeability tube was 50% and about 10 times higher than that of the low-permeability tube (5.8%), and the total oil recovery factor was 30.1%. After the injection of the 0.5 PV AMPS/ AM@SiO 2 microgel particles with a mass fraction of 0.2 wt %, the oil recovery factors of high-and low-permeability sandpacked tubes were 70.2 and 31.9%, respectively, which increase by 20.2 and 26.1%, respectively, and the total oil recovery factor was 52.9%, which is increased by 22.8%.…”

Section: Microgel Particlesmentioning

confidence: 95%

“…The storage modulus of the swollen gel of SN-PPG was increased from 570 to 1420 Pa compared to conventional PPG, and SN-PPG effectively improved the oil recovery by 29.86−38.59% in core flooding experiments. Jin et al 18 reported novel preformed gel particles with controllable density, which have favorable toughness due to the introduction of sodium montmorillonite, and they can expand at least 6 times after aging 6 days under hash reservoir conditions. Liu et al 25 indicated the current challenges and future research directions of micro/nanogel technologies.…”

Section: Introductionmentioning

confidence: 99%

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Temperature- and Salt-Tolerant 2-Acrylamide-2-methylpropanesulfonic Acid/AM@SiO₂ Microgel Particles: Synthesis and Enhanced Oil Recovery Performance Evaluation

Wang,

Song

et al. 2023

Ind. Eng. Chem. Res.

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To simultaneously meet the demands of small size for easy transportation and injection as well as temperature and salinity resistance, 2-acrylamide-2-methylpropanesulfonic acid (AMPS)/AM@SiO2 microgel particles were synthesized to achieve a good performance for the in-depth profile control treatment. The characteristic functional group, mechanical property, and enhanced oil recovery (EOR) performance were comprehensively evaluated by Fourier infrared spectrometer, nanoindentation apparatus, and sand-packed tubes with different permeability conditions. AMPS contains active double bonds and sulfonic acid groups, which could enhance the temperature and salinity resistance of gel systems. Therefore, the AMPS/AM and AMPS/AM@SiO2 microgel particles have remarkable temperature and salinity tolerance and can be used at a high temperature (130 °C) and high salinity conditions (200,000 mg/L). The mechanical energy can be dissipated effectively by adding 1.0 wt % nano-SiO2 which could significantly improve the compression strength and elastic modulus. The elastic moduli of the AMPS/AM@SiO2 microgel particles (1500 mg/L) are 17.36 MPa, which is much higher than that of AMPS/AM microgel particles (10.44 MPa). This effect can improve the performance of the antierosion and compression deformation of the AMPS/AM@SiO2 microgel particles. The AMPS/AM@SiO2 microgel particles not only have good plugging performance and antierosion stability that can divert the subsequent injected fluid to lower permeable zones but also can achieve an in-depth secondary plugging effect through compression deformation and remigration. The performance of profile control and oil displacement of the AMPS/AM@SiO2 microgel particles has been verified from parallel sand-packed tubes simulating strong heterogeneous reservoirs. Compared with water flooding, the total oil recovery was increased by 22.8% after the injection of 0.5 PV AMPS/AM@SiO2 microgel particles, which is higher than that of AMPS/AM microgel particles (16.4%). This work not only provides a potential agent, i.e., AMPS/AM@SiO2 microgel particle, for in-depth profile control in high temperature and high salinity offshore oilfields but also helps for a better understanding of the mechanism of in-depth profile control and EOR for microgel particles.

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Section: Microgel Particlesmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Temperature- and Salt-Tolerant 2-Acrylamide-2-methylpropanesulfonic Acid/AM@SiO₂ Microgel Particles: Synthesis and Enhanced Oil Recovery Performance Evaluation

Wang,

Song

et al. 2023

Ind. Eng. Chem. Res.

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“…A total of 0.5 g of prefabricated gel particle plugging agent and 100 mL of formation water/kerosene was sequentially added to 6 beakers and stirred with a magnetic stirrer for 10 min. Next, the magnetron was taken out and all the beakers were sealed and placed in a hot air drying oven with a constant temperature of 70 °C [ 19 ]. Finally, the microscopic morphology of WQ-100, PEG-1 and bulk particles was observed by the microscope, and the particle size changes were analyzed and counted.…”

Section: Experiments and Methodsmentioning

confidence: 99%

Enhanced Oil Recovery Mechanism and Technical Boundary of Gel Foam Profile Control System for Heterogeneous Reservoirs in Changqing

Wang

et al. 2022

Gels

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The gel plugging and flooding system has a long history of being researched and applied, but the Changqing reservoir geological characteristics are complex, and the synergistic performance of the composite gel foam plugging system is not fully understood, resulting in poor field application. Additionally, the technique boundary chart of the heterogeneous reservoir plugging system has hardly appeared. In this work, reservoir models of porous, fracture, and pore-fracture were constructed, a composite gel foam plugging system was developed, and its static injection and dynamic profile control and oil displacement performance were evaluated. Finally, combined with the experimental studies, a technical boundary chart of plugging systems for heterogeneous reservoirs is proposed. The research results show that the adsorption effect of microspheres (WQ-100) on the surface of elastic gel particles-1 (PEG-1) is more potent than that of pre-crosslinked particle gel (PPG) and the deposition is mainly on the surface of PPG. The adsorption effect of PEG-1 on the surface of PPG is not apparent, primarily manifested as deposition stacking. The gel was synthesized with 0.2% hydrolyzed polyacrylamide (HPAM) + 0.2% organic chromium cross-linking agent, and the strength of enhanced gel with WQ-100 was higher than that of PEG-1 and PPG. The comprehensive value of WQ-100 reinforced foam is greater than that of PEG-1, and PPG reinforced foam, and the enhanced foam with gel has a thick liquid film and poor foaming effect. For the heterogeneous porous reservoir with the permeability of 5/100 mD, the enhanced foam with WQ-100 shows better performance in plugging control and flooding, and the recovery factor increases by 28.05%. The improved foam with gel enhances the fluid flow diversion ability and the recovery factor of fractured reservoirs with fracture widths of 50 μm and 180 μm increases by 29.41% and 24.39%, respectively. For pore-fractured reservoirs with a permeability of 52/167 mD, the PEG + WQ-100 microsphere and enhanced foam with WQ-100 systems show better plugging and recovering performance, and the recovery factor increases are 20.52% and 17.08%, 24.44%, and 21.43%, respectively. The smaller the particle size of the prefabricated gel, the more uniform the adsorption on the foam liquid film and the stronger the stability of the foam system. The plugging performance of the composite gel system is stronger than that of the enhanced gel with foam, but the oil displacement performance of the gel-enhanced foam is better than that of the composite gel system due to the “plug-flooding-integrated” feature of the foam. Combined with the plugging and flooding performance of each plugging system, a technique boundary chart for the plugging system was established for the coexisting porous, fracture, and pore-fracture heterogeneous reservoirs in Changqing Oilfield.

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“…Кислотные обработки как метод интенсификации добычи нефти применяются уже более века. Многочисленные исследования [1][2][3][4][5][6][7][8], проведенные за это время, показали, что эффективность кислотных обработок зависит прежде всего от глубины проникновения кислоты в пласт и полноты растворения породы коллектора. Для высокотемпературных и трещиноватых коллекторов это достигается за счет снижения концентрации кислоты и/или подбора различных замедляющих реагентов [7][8][9][10][11].…”

Section: Introductionunclassified

“…Многочисленные исследования [1][2][3][4][5][6][7][8], проведенные за это время, показали, что эффективность кислотных обработок зависит прежде всего от глубины проникновения кислоты в пласт и полноты растворения породы коллектора. Для высокотемпературных и трещиноватых коллекторов это достигается за счет снижения концентрации кислоты и/или подбора различных замедляющих реагентов [7][8][9][10][11]. В низкотемпературных и доломитизированных коллекторах, наоборот, требуется увеличить скорость реакции с помощью облагораживающих добавок и увеличения концентрации кислоты [12,13].…”

Section: Introductionunclassified

Development and testing of an installation for determining the rate constant of the reaction of hydrochloric acid with carbonate formation rock

Kostin¹,

Nikulin²,

Khaydarshyn³

2022

SOCAR Proceedings

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The reaction rate constant is a powerful tool for improving the efficiency of acid treatments, which is used both for selecting optimal acid compositions and for mathematical modeling. However, there are still no unified methods and tools for its determination, which leads to low reproducibility of experiments and difficulties in interpreting the results. To improve the processes of studying the kinetics of the reaction of acid with carbonate rock, together with AO "Geologika", a volumetric installation "PIK-OSG" was designed and manufactured, a special algorithm for processing data was developed. A series of test experiments were carried out, a method was proposed to reduce the error by pressing the disintegrated core into tablets. Keywords: acid treatments; reaction kinetics; reaction rate constant; volumetric setup; laboratory studies.

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Novel preformed gel particles with controllable density and its implications for EOR in fractured-vuggy carbonated reservoirs

Cited by 7 publications

References 33 publications

Temperature- and Salt-Tolerant 2-Acrylamide-2-methylpropanesulfonic Acid/AM@SiO₂ Microgel Particles: Synthesis and Enhanced Oil Recovery Performance Evaluation

Temperature- and Salt-Tolerant 2-Acrylamide-2-methylpropanesulfonic Acid/AM@SiO₂ Microgel Particles: Synthesis and Enhanced Oil Recovery Performance Evaluation

Enhanced Oil Recovery Mechanism and Technical Boundary of Gel Foam Profile Control System for Heterogeneous Reservoirs in Changqing

Development and testing of an installation for determining the rate constant of the reaction of hydrochloric acid with carbonate formation rock

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Novel preformed gel particles with controllable density and its implications for EOR in fractured-vuggy carbonated reservoirs

Cited by 7 publications

References 33 publications

Temperature- and Salt-Tolerant 2-Acrylamide-2-methylpropanesulfonic Acid/AM@SiO2 Microgel Particles: Synthesis and Enhanced Oil Recovery Performance Evaluation

Temperature- and Salt-Tolerant 2-Acrylamide-2-methylpropanesulfonic Acid/AM@SiO2 Microgel Particles: Synthesis and Enhanced Oil Recovery Performance Evaluation

Enhanced Oil Recovery Mechanism and Technical Boundary of Gel Foam Profile Control System for Heterogeneous Reservoirs in Changqing

Development and testing of an installation for determining the rate constant of the reaction of hydrochloric acid with carbonate formation rock

Contact Info

Product

Resources

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Temperature- and Salt-Tolerant 2-Acrylamide-2-methylpropanesulfonic Acid/AM@SiO₂ Microgel Particles: Synthesis and Enhanced Oil Recovery Performance Evaluation

Temperature- and Salt-Tolerant 2-Acrylamide-2-methylpropanesulfonic Acid/AM@SiO₂ Microgel Particles: Synthesis and Enhanced Oil Recovery Performance Evaluation