A review of wettability alteration using surfactants in carbonate reservoirs

Yao, Ya; Wei, Mingzhen; Kang, Wanli

doi:10.1016/j.cis.2021.102477

Cited by 91 publications

(54 citation statements)

References 132 publications

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“…The storage and dissipation moduli were used to characterise the viscoelasticity of the solution based on the relationship between the force and corresponding deformation. When the solution viscosity reached 125 mPa·s, the results of the two methods were consistent [ 47 ].…”

Section: Resultsmentioning

confidence: 99%

Influence of Polymer Viscoelasticity on Microscopic Remaining Oil Production

et al. 2022

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To investigate the impact of polymer viscoelasticity on microscopic remaining oil production, this study used microscopic oil displacement visualisation technology, numerical simulations in PolyFlow software, and core seepage experiments to study the viscoelasticity of polymers and their elastic effects in porous media. We analysed the forces affecting the microscopic remaining oil in different directions, and the influence of polymer viscoelasticity on the displacement efficiency of microscopic remaining oil. The results demonstrated that the greater the viscosity of the polymer, the greater the deformation and the higher the elasticity proportion. In addition, during the creep recovery experiment at low speed, the polymer solution was mainly viscous, while at high speed it was mainly elastic. When the polymer viscosity reached 125 mPa·s, the core effective permeability reached 100 × 10−3 μm2, and the equivalent shear rate exceeded 1000 s−1, the polymer exhibited an elastic effect in the porous medium and the viscosity curve displayed an ‘upward’ phenomenon. Moreover, the difference in the normal deviatoric stress and horizontal stress acting on the microscopic remaining oil increased exponentially as the viscosity of the polymer increased. The greater the viscosity of the polymer, the greater the remaining oil deformation. During the microscopic visualisation flooding experiment, the viscosity of the polymer, the scope of the mainstream line, and the recovery factor all increased. The scope of spread in the shunt line area significantly increased, but the recovery factor was significantly lower than that in the mainstream line. The amount of remaining oil in the unaffected microscopic area also decreased.

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Section: Resultsmentioning

confidence: 99%

Influence of Polymer Viscoelasticity on Microscopic Remaining Oil Production

et al. 2022

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“…Ligands and surfactants could bind to the surface of materials, typically via coordination bonds or charge interactions, thereby modifying the surface properties. They play a critical role in various fields such as biocompatibility [1,2], wetting treatment [3,4], anti-bacteria [5,6], and anti-corrosion [7,8]. For nanomaterials, high surface area is the basic characteristic, so that ligands are essential in reducing their surface energy.…”

Section: Introductionmentioning

confidence: 99%

Turning weak into strong: on the CTAB-induced active surface growth

et al. 2022

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Discovering new methods and principles in the inequivalent growth of equivalent facets is of great significance for going beyond symmetrical nanocrystals and for out-of-box exploration. In this work, we demonstrate that a middle ground exists between the traditional weak ligands and the strong ligands with unusual growth modes. By modifying the seed concentration during the growth of pentagonal Au nanorods, the typical weak ligand cetyltrimethylammonium bromide (CTAB) is made strong, leading to notches of restricted growth and even the active surface growth mode. In-depth investigation in the link between growth kinetics and ligand packing reveals the principle of their interplay --that the on-off dynamics of the ligands only allows for a certain limit of materials deposition rate. Beyond this limit, the growth materials build up and are then diverted elsewhere, leading to inequivalent growth. The fact that a freshly grown surface has few ligands promotes the active surface growth, focusing the growth materials onto a few sites. We believe that the knowhow of interfering ligand packing via growth kinetics would offer a powerful tool of synthetic control, where the facet-and curvature-dependent ligand packing is expected to be useful synthetic handles.

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“…*Corresponding Author Institutional Email: B16020083@s.upc.edu.cn (Q. Li) Four strategies are usually used for gas production from hydrate reservoir: (1) Depressurization [7], to decrease the reservoir pressure below the phase equilibrium pressure; (2) Thermal stimulation [8], to heat the reservoir above the phase equilibrium temperature with injection of hot water, hot brine or steam; (3) Thermodynamic inhibitor injection, to inject chemicals [9]; and (4) combination of these above strategies [10]. Among them, the last one appears to be the most efficient.…”

Section: Introductionmentioning

confidence: 99%

Effects of Drilling Mud Properties on Hydrate Dissociation Around Wellbore during Drilling Operation in Hydrate Reservoir

2022

IJE

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Natural gas hydrate is a potential energy source in the near future, and its commercial development can alleviate the global energy crisis. Disturbance of drilling mud invasion on hydrate reservoir can lead to hydrate dissociation, affecting wellbore stability while drilling in clayey silt hydrate reservoirs. In this work, the coupled thermo-hydro-chemical finite element model was developed, and influences of drilling mud properties on hydrate dissociation were investigated. The obtained results show that the hydrate dissociation range around wellbore widens as the mud temperature increases. The final dissociation range caused by drilling mud invasion nonlinearly increases from 3.83cm to 10.57cm when the mud temperature has increased from 17.25℃ to 21.25℃. Therefore, the drilling mud needs to be cooled during preparation in platform. In addition, dissociation range narrows as the bottom-hole pressure increases. Dissociation range decreases from 12.18cm to 7.46cm when the bottom-hole pressure is increased from 14.50MPa to 17.00MPa. Thus, the overbalanced/near-balanced drilling operation is preferred during drilling in hydrate reservoirs, and the underbalanced drilling operation is not recommended. Moreover, the increase of mud salinity exacerbates hydrate dissociation in the nearwellbore region. In view of the prevention of hydrate dissociation in the near-wellbore, it is necessary to confect the drilling mud that with appropriate salinity while drilling in hydrate-bearing sediments.

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A review of wettability alteration using surfactants in carbonate reservoirs

Cited by 91 publications

References 132 publications

Influence of Polymer Viscoelasticity on Microscopic Remaining Oil Production

Influence of Polymer Viscoelasticity on Microscopic Remaining Oil Production

Turning weak into strong: on the CTAB-induced active surface growth

Effects of Drilling Mud Properties on Hydrate Dissociation Around Wellbore during Drilling Operation in Hydrate Reservoir

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