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Célio L. Cavalcante - One of the best experts on this subject based on the ideXlab platform.
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Scale Inhibitor adsorption studies in rock sandstone type
Adsorption, 2014Co-Authors: Carolina B. Veloso, Álvaro N. A. Silva, Thiago T. G. Watanabe, J. Felipe B. C. Paes, F. Murilo T. Luna, Célio L. CavalcanteAbstract:In offshore petroleum fields, the reservoir injection of seawater and produced waters, are in fact common operations with purpose to stimulate and increase the productions. However, this particular method causes the Scale formation damaging the production structures. In order to prevent the formation of the aforesaid deposits, it is common to use the squeeze treatment, whereby the Scale Inhibitors were injected into the wellbore and may also be adsorbed or precipitated into the rock surface. In this study, the interactions between a commercial Scale Inhibitor and a sandstone rock were evaluated. The column experiments were performed for different feed concentrations and temperatures. The simulation models (Linear Drive Force and General Rate) were used to predict the breakthrough curves and estimate the mass transfer parameters. Whereas, isotherms were obtained from the breakthrough curves and the maximum adsorption capacity of 6.17 mg g^−1 was determined. A remarkable agreement between the experimental data and the representation model was observed. The low diffusion coefficients, between 0.1 × 10^−5 and 9.78 × 10^−5 cm^2 min^−1, characterized this particular process as a high diffusion resistance. Regarding the desorption tests, part of the Inhibitor still remained in the column. This said behavior in the squeeze treatment is expected, since the Inhibitor remains in contact with the rock for a longer period, it being possible to expand the lifetime of the squeeze treatment.
V. Tantayakom - One of the best experts on this subject based on the ideXlab platform.
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Scale inhibition study by turbidity measurement
Journal of Colloid and Interface Science, 2005Co-Authors: V. Tantayakom, Thammanoon Sreethawong, Scott H Fogler, F F De Moraes, Sumaeth ChavadejAbstract:The concept of a critical supersaturation ratio (CSSR) has been used to characterize the effectiveness of different types of Scale Inhibitors, Inhibitor concentration, and precipitating solution pH in order to prevent the formation of barium sulfate Scale. The Scale Inhibitors used in this work were aminotrimethylene phosphonic acid (ATMP), diethylenetriaminepentamethylene phosphonic acid (DTPMP), and phosphinopolycarboxylic acid polymer (PPCA). The CSSR at which barium sulfate precipitates was obtained as a function of time for different precipitation conditions and was used as an index to evaluate the effect of the precipitation conditions. The results showed that the CSSRs decrease with increasing elapsed time after mixing the precipitating solutions, but increases with increasing Scale Inhibitor concentration and solution pH. The CSSR varies linearly with the log of the Scale Inhibitor concentration and with the precipitating solution pH. A SEM analysis showed that the higher the Scale Inhibitor concentration and solution pH, the smaller and more spherical the BaSO4 precipitates. Analysis of the particle size distribution revealed that increasing the elapsed time, the Scale Inhibitor concentration, and precipitating solution pH, all produce a broader particle size distribution and a smaller mean diameter of the BaSO4 precipitates. DTPMP and PPCA were the most effective BaSO4 Scale Inhibitors per ionizable proton and the most effective on a concentration basis, respectively.
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Kinetic Study of Scale Inhibitor Precipitation in Squeeze Treatment
Crystal Growth & Design, 2005Co-Authors: V. Tantayakom, H. S. Fogler, P. Charoensirithavorn, Sumaeth ChavadejAbstract:Oilfield formation damage by Scale formation can occur when two incompatible brine streams are mixed. A common method for preventing Scale formation is the use of chemical Scale Inhibitors such as aminotri(methylene phosphonic acid) (ATMP). Scale Inhibitors are injected and retained in the reservoir by adsorption and/or precipitation. The induction time, the period between the establishment of supersaturation and the detection of a new phase, is a measure of the ability of an Inhibitor solution to remain in the metastable state. As a result, long induction times allow transport of Inhibitor fluids into the near-wellbore regions without precipitation of the Scale Inhibitor and subsequent formation damage. In this study, an induction time model is applied to precipitation of the Inhibitor (ATMP) with Ca2+ ions. The nucleation kinetics can be described by classical nucleation theory. Solution equilibrium was calculated by accounting for Inhibitor dissociation and cation−Inhibitor complexing as a function of ...
Yongfang Yang - One of the best experts on this subject based on the ideXlab platform.
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a natural extract of tobacco rob as Scale and corrosion Inhibitor in artificial seawater
Desalination, 2016Co-Authors: Hefang Wang, Yongfang Yang, Rongbin HuAbstract:Abstract The corrosion inhibition performance of tobacco rob extract (TRE) for Q235 corrosion in artificial seawater was investigated by potentiodynamic polarization. The experimental results indicate that TRE has good corrosion inhibition performance and the inhibition efficiency increased with the increase of TRE concentration. Scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) indicated that the corrosion inhibition is due to the formation of a chemisorbed film on the steel. The anti-Scale property of TRE in artificial seawater was also studied by static tests for Scale and the Scale deposits were analyzed by X-ray diffraction (XRD) and SEM, respectively. The results showed that the Scale deposits surface morphology and size were changed in the presence of TRE. The corrosion and Scale inhibition results indicated the potential use of TRE as an efficient corrosion and Scale Inhibitor in artificial seawater.
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a natural extract of tobacco rob as Scale and corrosion Inhibitor in artificial seawater
Desalination, 2016Co-Authors: Hefang Wang, Meidan Gao, Yong Guo, Yongfang YangAbstract:Abstract The corrosion inhibition performance of tobacco rob extract (TRE) for Q235 corrosion in artificial seawater was investigated by potentiodynamic polarization. The experimental results indicate that TRE has good corrosion inhibition performance and the inhibition efficiency increased with the increase of TRE concentration. Scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) indicated that the corrosion inhibition is due to the formation of a chemisorbed film on the steel. The anti-Scale property of TRE in artificial seawater was also studied by static tests for Scale and the Scale deposits were analyzed by X-ray diffraction (XRD) and SEM, respectively. The results showed that the Scale deposits surface morphology and size were changed in the presence of TRE. The corrosion and Scale inhibition results indicated the potential use of TRE as an efficient corrosion and Scale Inhibitor in artificial seawater.
Sumaeth Chavadej - One of the best experts on this subject based on the ideXlab platform.
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Scale inhibition study by turbidity measurement
Journal of Colloid and Interface Science, 2005Co-Authors: V. Tantayakom, Thammanoon Sreethawong, Scott H Fogler, F F De Moraes, Sumaeth ChavadejAbstract:The concept of a critical supersaturation ratio (CSSR) has been used to characterize the effectiveness of different types of Scale Inhibitors, Inhibitor concentration, and precipitating solution pH in order to prevent the formation of barium sulfate Scale. The Scale Inhibitors used in this work were aminotrimethylene phosphonic acid (ATMP), diethylenetriaminepentamethylene phosphonic acid (DTPMP), and phosphinopolycarboxylic acid polymer (PPCA). The CSSR at which barium sulfate precipitates was obtained as a function of time for different precipitation conditions and was used as an index to evaluate the effect of the precipitation conditions. The results showed that the CSSRs decrease with increasing elapsed time after mixing the precipitating solutions, but increases with increasing Scale Inhibitor concentration and solution pH. The CSSR varies linearly with the log of the Scale Inhibitor concentration and with the precipitating solution pH. A SEM analysis showed that the higher the Scale Inhibitor concentration and solution pH, the smaller and more spherical the BaSO4 precipitates. Analysis of the particle size distribution revealed that increasing the elapsed time, the Scale Inhibitor concentration, and precipitating solution pH, all produce a broader particle size distribution and a smaller mean diameter of the BaSO4 precipitates. DTPMP and PPCA were the most effective BaSO4 Scale Inhibitors per ionizable proton and the most effective on a concentration basis, respectively.
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Kinetic Study of Scale Inhibitor Precipitation in Squeeze Treatment
Crystal Growth & Design, 2005Co-Authors: V. Tantayakom, H. S. Fogler, P. Charoensirithavorn, Sumaeth ChavadejAbstract:Oilfield formation damage by Scale formation can occur when two incompatible brine streams are mixed. A common method for preventing Scale formation is the use of chemical Scale Inhibitors such as aminotri(methylene phosphonic acid) (ATMP). Scale Inhibitors are injected and retained in the reservoir by adsorption and/or precipitation. The induction time, the period between the establishment of supersaturation and the detection of a new phase, is a measure of the ability of an Inhibitor solution to remain in the metastable state. As a result, long induction times allow transport of Inhibitor fluids into the near-wellbore regions without precipitation of the Scale Inhibitor and subsequent formation damage. In this study, an induction time model is applied to precipitation of the Inhibitor (ATMP) with Ca2+ ions. The nucleation kinetics can be described by classical nucleation theory. Solution equilibrium was calculated by accounting for Inhibitor dissociation and cation−Inhibitor complexing as a function of ...
Hefang Wang - One of the best experts on this subject based on the ideXlab platform.
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a natural extract of tobacco rob as Scale and corrosion Inhibitor in artificial seawater
Desalination, 2016Co-Authors: Hefang Wang, Yongfang Yang, Rongbin HuAbstract:Abstract The corrosion inhibition performance of tobacco rob extract (TRE) for Q235 corrosion in artificial seawater was investigated by potentiodynamic polarization. The experimental results indicate that TRE has good corrosion inhibition performance and the inhibition efficiency increased with the increase of TRE concentration. Scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) indicated that the corrosion inhibition is due to the formation of a chemisorbed film on the steel. The anti-Scale property of TRE in artificial seawater was also studied by static tests for Scale and the Scale deposits were analyzed by X-ray diffraction (XRD) and SEM, respectively. The results showed that the Scale deposits surface morphology and size were changed in the presence of TRE. The corrosion and Scale inhibition results indicated the potential use of TRE as an efficient corrosion and Scale Inhibitor in artificial seawater.
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a natural extract of tobacco rob as Scale and corrosion Inhibitor in artificial seawater
Desalination, 2016Co-Authors: Hefang Wang, Meidan Gao, Yong Guo, Yongfang YangAbstract:Abstract The corrosion inhibition performance of tobacco rob extract (TRE) for Q235 corrosion in artificial seawater was investigated by potentiodynamic polarization. The experimental results indicate that TRE has good corrosion inhibition performance and the inhibition efficiency increased with the increase of TRE concentration. Scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) indicated that the corrosion inhibition is due to the formation of a chemisorbed film on the steel. The anti-Scale property of TRE in artificial seawater was also studied by static tests for Scale and the Scale deposits were analyzed by X-ray diffraction (XRD) and SEM, respectively. The results showed that the Scale deposits surface morphology and size were changed in the presence of TRE. The corrosion and Scale inhibition results indicated the potential use of TRE as an efficient corrosion and Scale Inhibitor in artificial seawater.
