Study of the effect of clay swelling on the oil recovery factor in porous media using a glass micromodel

Sharifipour, M.; Pourafshary, Peyman; Nakhaee, Ali

doi:10.1016/j.clay.2017.02.020

Cited by 33 publications

(14 citation statements)

References 16 publications

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“…The swelling of clay minerals in a loose sandstone reservoir is mainly the swelling of montmorillonite . Montmorillonite easily falls off after hydration, and it may block the reservoir along with the steam flow, which could result in some reservoir damage. − In view of the study of the swelling properties of clay minerals in the reservoir after steam injection, investigations are mainly carried out to focus on the two aspects of fluid salinity and pH.…”

Section: Resultsmentioning

confidence: 99%

Microscopic Mechanism of Clay Minerals on Reservoir Damage during Steam Injection in Unconsolidated Sandstone

et al. 2018

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In this work, the swelling, transformation, and dissolution of clay minerals after steam injection in heavy oil reservoir were investigated, and the damage mechanism of steam injection was discussed to research the microscopic mechanism of clay minerals on reservoir damage during steam injection in unconsolidated sandstone. The results show that the swelling of clay minerals increases with the increase of the pH of the brine and decreases with the increase of the salinity of the brine. As we all know, the swollen clay minerals are liable to fall from the inner wall of the pass, which may cause the blockage of reservoirs. What is more, the environment of high temperature and high pH would promote the transformation of the clay minerals. Montmorillonite can be transformed into illite and analcime, and kaolinite can be transformeddue to the water sensitivity of the clay mineralto montmorillonite and analcime, whereas illite is relatively stable. For the movement of particles in the reservoir during the injection of steam, the water sensitivity of clay mineral montmorillonite and the new clay minerals analcime can easily plug the small reservoir pore, which is one of the main ways to cause damage to the reservoir during steam injection. The dissolution of clay minerals increases with the increase of temperature and increases with the increase of the pH of the brine. The dissolution of clay minerals would produce a large number of particles and make the rock matrix more loose, which may cause some reservoir damage, such as reservoir collapse, and so on.

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Section: Resultsmentioning

confidence: 99%

Microscopic Mechanism of Clay Minerals on Reservoir Damage during Steam Injection in Unconsolidated Sandstone

et al. 2018

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“…Five 2D glass micromodels with high contrast pattern ( Fig. 1 ) were designed to mimic a typical sandstone reservoir [6] , [35] . The circular, square and triangular pore body shapes represent the difference in the pore geometries.…”

Section: Experimental Set-up and Proceduresmentioning

confidence: 99%

Effects of reservoir rock pore geometries and ultrasonic parameters on the removal of asphaltene deposition under ultrasonic waves

Otumudia

Hamidi

Jadhawar

et al. 2022

Ultrasonics Sonochemistry

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“…Glass micromodels are two-dimensional porous samples that are capable of visualizing the mechanisms of enhanced oil recovery at the pore scale in different flooding experiments. 27 An etched glass micromodel was used in our experiments. The micromodel was constructed from a clear glass sheet of 4 mm thickness.…”

Section: Interfacial Tension Measurementsmentioning

confidence: 99%

Experimental Investigation of Molecular Deposition Filming Flooding in a Low-Permeability Oil Reservoir

et al. 2020

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Molecular deposition (MD) filming flooding has proved to be an effective enhanced oil recovery (EOR) method in reservoirs where recovery was relatively difficult. The B425 block with a low permeability in Shengli Oilfield, China, has reaped the benefits of MD filming flooding. However, the main EOR mechanisms and the influencing factors in this block are still not clear. In this work, laboratory experiments were conducted under various conditions to investigate the EOR mechanisms of MD filming flooding and its potential use in enhancing the recovery of low-permeability reservoirs. Spontaneous imbibition, micromodel displacement, and oil–water relative permeability experiments were also performed. The results indicate that a MD filming flooding agent (MDFFA) with lower molecular weight can more effectively reduce the interfacial tension (IFT) and perform better in wettability alteration. The improvement of seepage capacity is obviously increased when the molecular weight of the MDFFA is less than 1000 g/mol. The low molecular weight MDFFA has a better effect on the spontaneous imbibition in a capillary with a larger diameter, and increasing the concentration can enhance this process. Lower injection rate and lower injection concentration are beneficial to reduce the injection pressure and improve oil recovery. The smaller the permeability of cores, the greater the relative permeability difference between water flooding and MD filming flooding. In addition, lower core permeability is more conductive to the EOR mechanisms of MD filming flooding in the low-permeability oil reservoirs.

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Study of the effect of clay swelling on the oil recovery factor in porous media using a glass micromodel

Cited by 33 publications

References 16 publications

Microscopic Mechanism of Clay Minerals on Reservoir Damage during Steam Injection in Unconsolidated Sandstone

Microscopic Mechanism of Clay Minerals on Reservoir Damage during Steam Injection in Unconsolidated Sandstone

Effects of reservoir rock pore geometries and ultrasonic parameters on the removal of asphaltene deposition under ultrasonic waves

Experimental Investigation of Molecular Deposition Filming Flooding in a Low-Permeability Oil Reservoir

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