Wettability alteration of carbonate rocks from liquid-wetting to ultra gas-wetting using TiO 2 , SiO 2 and CNT nanofluids containing fluorochemicals, for enhanced gas recovery

Esmaeilzadeh, Pouriya; Sadeghi, Mohammad Taghi; Fakhroueian, Zahra; Bahramian, Alireza; Norouzbeigi, Reza

doi:10.1016/j.jngse.2015.08.037

Cited by 62 publications

(27 citation statements)

References 64 publications

(92 reference statements)

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“…The spontaneous imbibition of water or n-decane into a dry, air-saturated carbonate rock, before and after wettability alteration of the rock to gas-wetting condition by TiO 2 nanofluid was measured in our previous paper [18]. We have showed that the final saturations of water and n-decane imbibed in the air-saturated rock sample reduced predominantly after wettability alteration.…”

Section: Spontaneous Imbibitionmentioning

confidence: 75%

“…In order to study the influence of the prepared TiO 2 nanofluid on wettability alteration, the core plugs were fully submerged in nanofluids and aged in an oven at 80°C for 48 h [18]. Then, the core plugs were dried at 80°C prior to the contact angle measurement test.…”

Section: Contact Angle Measurementmentioning

confidence: 99%

“…Finally, the resultant product was calcined at 800°C for 6 h in a muffle furnace. We have demonstrated this procedure of synthesizing that leads to production of fine TiO 2 nanoparticles with superhydrophobic and self-cleaning properties [18]. The sizes of the synthesized nanoparticles were determined to be 12-20 nm, using Transmission Electron Microscopy (TEM) (Philips CM30) ( Fig.…”

Section: Introductionmentioning

confidence: 99%

“…Aminnaji et al [17] experimentally studied the use of a nanofluid containing organofluorine and silicon-based nanoparticles with reasonable capability to change the wettability of the carbonate and sandstone rocks to intermediate gas-wet state. Recently, we have reported for the first time on achieving the wettability alteration of strongly liquid-wet carbonate rocks to ultra gas-wet state using novel TiO 2 , SiO 2 and CNT nanofluids by performing several small-scale slab tests [18].…”

Section: Introductionmentioning

confidence: 99%

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Production improvement in gas condensate reservoirs by wettability alteration, using superamphiphobic titanium oxide nanofluid

Esmaeilzadeh

Sadeghi

Bahramian

2018

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Many gas condensate reservoirs suffer a loss in productivity owing to accumulation of liquid in near-wellbore region. Wettability alteration of reservoir rock from liquid-wetting to gas-wetting appears to be a promising technique for elimination of the condensate blockage. In this paper, we report use of a superamphiphobic nanofluid containing TiO2 nanoparticles and low surface energy materials as polytetrafluoroethylene and trichloro(1H,1H,2H,2H-perfluorooctyl)silane to change the wettability of the carbonate reservoir rock to ultra gas-wetting. The utilization of nanofluid in the wettability alteration of carbonate rocks to gas-wetting in core scale has not been reported already and is still an ongoing issue. Contact angle measurements was conducted to investigate the wettability of carbonate core plugs in presence of nanofluid. It was found that the novel formulated nanofluid used in this work can remarkably change the wettability of the rock from both strongly water- and oil-wetting to highly gas-wetting condition. The adsorption of nanoparticles on the rock and formation of nano/submicron surface roughness was verified by Scanning Electron Microscope (SEM) and Stylus Profilometer (SP) analyses. Using free imbibition test, we showed that the nanofluid can imbibe interestingly into the core sample, resulting in notable ultimate gas-condensate liquid recovery. Moreover, we studied the effect of nanofluid on relative permeability and recovery performance of gas/water and gas/oil systems for a carbonate core. The result of coreflooding tests demonstrates that the relative permeability of both gas and liquid phase increased significantly as well as the liquid phase recovery enhanced greatly after the wettability alteration to gas-wetting.

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Section: Spontaneous Imbibitionmentioning

confidence: 75%

Section: Contact Angle Measurementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Production improvement in gas condensate reservoirs by wettability alteration, using superamphiphobic titanium oxide nanofluid

Esmaeilzadeh

Sadeghi

Bahramian

2018

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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“…Therefore, some researchers have proposed to change the wettability of the reservoir surface by non-polymers. Aminnaji 15 investigated that a nanofluid can change the rock wettability to neutral gas wetness within 24 h. Esmaeilzadeh 16 reported on a non-polymer material prepared by the gel method, which has good hydrophobic and oleophobic properties and can alter the surface of the reservoir from strong liquid wetness to gas wetness. Jin and Wang 17 altered the wettability of gas condensate reservoirs from liquid-wet to gas-wet by non-polymeric fluorosurfactant, which can be used to overcome the difficulties of the liquid lock effects and further significantly improve the gas recovery.…”

Section: Introductionmentioning

confidence: 99%

The effect of N-ethyl-N-hydroxyethyl perfluorooctanoamide on wettability alteration of shale reservoir

Wang

Gomado

et al. 2018

Sci Rep

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The wettability of the formation is critical for the flow back of the fracturing fluid and can further affect the gas production. So it is very necessary to study the wettability of shale reservoir. Here, a novel fluorocarbon surfactant, N-ethyl-N-hydroxyethyl perfluorooctanoamide, was synthesized and characterized by different methods. the contact angles of water and n-decane on the shale increased from 36° and 0° to 121° and 105°, respectively, after treated by N-ethyl-N-hydroxyethyl perfluorooctanoamide (0.5 wt.%). The surface free energy reduced from 72 mN/m to 7.4 mN/m. The results agreed with that of imbibition and capillary tube rise test. Additionally, the analysis of scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS) showed that the roughness of shale surface remarkably increased. These results fully proved that the shale wettability is changed to super gas-wetting. Besides, the thermal analysis revealed that the novel fluorocarbon surfactant has good thermal stability. This indicates that it can be better applied to reservoir modifications at higher temperatures.

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Wettability alteration of reservoir rocks to gas wetting condition: A comparative study

2017

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Productivity of gas condensate reservoirs reduces significantly due to the near wellbore condensate/water blockage phenomenon. A novel, permanent solution to alleviate this problem is near wellbore wettability alteration of reservoir rocks to preferentially gas wetting conditions; industrial chemical materials are good candidates for this purpose, because of their eco‐friendly characteristics, economical price, and mass production. In this paper, a comparative study is conducted on two industrial fluorinated chemicals, MariSeal 800 and SurfaPore M. Static and dynamic contact angle measurements, spontaneous imbibition, and core flooding tests were conducted to investigate the effect of utilized chemical agents on surface wetting behaviour and fluid flow characteristics of rock samples. Contact angle measurements demonstrate that the liquid phase is changed to a non‐wetting phase after chemical treatment and MariSeal 800 has a greater potential to decrease the surface free energy of the calcite surface. Although both chemicals reveal great potential in static contact angle measurements, further experiments were conducted to distinguish between their abilities. Spontaneous air liquid imbibition tests and endpoint relative permeability measurements approved the potential of utilized chemicals to improve liquid phase mobility and decrease critical condensate saturation, which improve production parameters and reservoir productivity. Liquid phase endpoint relative permeabilities of sandstone core samples were improved by factors of 1.74 and 2.62; furthermore, irreducible liquid phase saturations were decreased by factors of 0.68 and 0.5 using MariSeal 800 and SurfaPore M chemicals. The results of this research help efficient selection of chemical agents for further field applications.

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Wettability alteration of carbonate rocks from liquid-wetting to ultra gas-wetting using TiO 2 , SiO 2 and CNT nanofluids containing fluorochemicals, for enhanced gas recovery

Cited by 62 publications

References 64 publications

Production improvement in gas condensate reservoirs by wettability alteration, using superamphiphobic titanium oxide nanofluid

Production improvement in gas condensate reservoirs by wettability alteration, using superamphiphobic titanium oxide nanofluid

The effect of N-ethyl-N-hydroxyethyl perfluorooctanoamide on wettability alteration of shale reservoir

Wettability alteration of reservoir rocks to gas wetting condition: A comparative study

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