Scale Formation in Reservoir and Production Equipment During Oil Recovery. III. A Kinetic Model for the Precipitation/Dissolution Reactions.

Granbakken, Dag; Haarberg, Torstein; Rollheim, Mette; Østvold, Terje; Read, Peter; Schmidt, Terje; Underhill, Allan E.

doi:10.3891/acta.chem.scand.45-0892

Cited by 12 publications

(6 citation statements)

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“…(13) is not universal, we can still check its applicability to field calculations and predictions of the induction time of scale formation, even for the special case of 10 m/day fluid velocity. Thus, a few core blocking tests (runs 16,17) were carried out and the measured induction times were compared with the predictions of Eq. (13).…”

Section: Resultsmentioning

confidence: 99%

“…Scaling in the field involves both flowing conditions and heterogeneous nucleation processes. Only few studies can be found that take into account the effect of the flow velocity on the precipitation process [16][17][18][19][20][21][22][23][24]. However, all those studies focus mostly on the kinetics of the precipitation process and not on the induction time itself.…”

Section: Literature Review For the Prediction Of Caco 3 Precipitationmentioning

confidence: 99%

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An improved predictive correlation for the induction time of CaCO3 scale formation during flow in porous media

Stamatakis

Stubos

Palyvos

et al. 2005

Journal of Colloid and Interface Science

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Section: Resultsmentioning

confidence: 99%

Section: Literature Review For the Prediction Of Caco 3 Precipitationmentioning

confidence: 99%

An improved predictive correlation for the induction time of CaCO3 scale formation during flow in porous media

Stamatakis

Stubos

Palyvos

et al. 2005

Journal of Colloid and Interface Science

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“…Kinetic study of the crystallization of calcium sulphates from supersaturated solutions of gypsum and anhydrite [33], carried out at T = 323 K and P = 1 atm, reveals the coexistence of dihydrate and anhydrite at the beginning of the reaction. However, during the evolution of the reaction, the solution becomes oversaturated in respect to gypsum whereas the anhydrite becomes the stable solid phase which continues to precipitate to reach equilibrium.…”

Section: Authorsmentioning

confidence: 99%

Coprecipitation of gadolinium with calcium sulphate dihydrate

Bouhlassa¹,

Selhamen

2010

Radiochimica Acta

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The present study reports the coprecipitation of gadolinium with calcium sulphate dihydrate, in aqueous solutions of sulphuric acid, at constant ionic strength using a radiotracer technique.The experimental results obtained at ambient temperature, show that the quantity of gadolinium ions coprecipitated in gypsum identified by X-ray diffraction (XRD) and elemental analysis is very small, lower than 4 at. %. The mechanism of coprecipitation of Gd(III) has been discussed, although the elementary processes of the mechanism are not clear.The distribution of gadolinium between precipitate of gypsum and saturated aqueous solutions of H 2 SO 4 has been measured between 30 and 70 • C. Experiments of coprecipitation indicate that the coefficient of distribution of Gd(III) depends on the solubility and nature of solid calcium sulphate phase.

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“…The k ‐value for barite of Granbakken et al . () was used. The parameter values used in the calculations are summarized in Tables .…”

Section: Interpretation Of the Distributions Of Quartz And Barite In mentioning

confidence: 99%

“…Namely, this model is composed of the box and not pipes. The following equations (Granbakken et al ., ) were used for the precipitation of barite and anhydrite:

{dC}_{normalm} / dt = - k (normalA / normalM) {({normalC}_{mo} - {normalC}_{normalm})}^{2} + {qV}^{- 1} ({normalC}_{mi} - {normalC}_{normalm})

\begin{matrix} {dC}_{normalm} / dt = - k (normalA / normalM) {{(C_{m} C_{A})}^{1 / 2} - {(K_{sp} / γ^{2})}^{1 / 2}}^{2} \\ + {qV}^{- 1} ({normalC}_{mi} - {normalC}_{normalm}) \end{matrix}

where C mo and C mi are the equilibrium concentration and the initial concentration, respectively, K sp is the solubility product and γ is the average activity coefficient. The initial concentrations of cations (C mi ) and anions (C Ai ) are expressed as

{normalC}_{mi} = {normalC}_{mprec} + {normalC}_{normalm}

{normalC}_{Ai} = {normalC}_{Aprec} + {normalC}_{normalA}

…”

Section: Interpretation Of the Distributions Of Quartz And Barite In mentioning

confidence: 99%

Interpretation of Mineral Zoning in Submarine Hydrothermal Ore Deposits in Terms of Coupled Fluid Flow‐Precipitation Kinetics Model

2012

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Major minerals (sulfates, sulfides, quartz) are distributed in different parts of submarine hydrothermal ore deposits. For instance, the abundance of barite increases stratigraphically upwards in the massive orebodies of the Kuroko deposits (black and yellow ores), while quartz is abundant in the lower parts (siliceous ore). The different distribution of barite and quartz in the Kuroko deposits can not be accounted for by thermochemical equilibrium calculations based on the precipitation due to mixing of ascending hydrothermal solutions with ambient cold seawater. In the present study, a coupled fluid flow-precipitation kinetics model was used to calculate the amounts of quartz, barite, and anhydrite precipitated from a hydrothermal solution mixed with seawater, assuming reasonable values for temperature, precipitation rate, fluid flow velocity, mineral surface area/fluid mass ratio (A/M), and initial concentrations of hydrothermal solution and seawater before mixing occurred. The results indicate that barite precipitates more efficiently than quartz from discharging fluids with relatively higher flow velocity, lower temperatures and under the condition of lower A/M ratios on the seafloor (black ore), whereas quartz precipitates more effectively from solutions with lower flow velocity, higher temperatures and higher A/M ratios beneath the seafloor (siliceous ore) and in the orebody (barite ore, ferruginous chert ore). Anhydrite precipitates in shallow sub-seafloor environments with lower precipitation rates and higher A/M ratios than barite and higher precipitation rates and lower A/M ratios than quartz. These results explain the observed occurrences of barite, anhydrite, and quartz in the Kuroko deposits. Namely, barite is abundant in black ore and barite ore which formed above the seafloor, anhydrite formed in high-permeability tuff breccias, and quartz formed in low permeability dacite intrusive bodies in the sub-seafloor environment.

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Scale Formation in Reservoir and Production Equipment During Oil Recovery. III. A Kinetic Model for the Precipitation/Dissolution Reactions.

Cited by 12 publications

References 0 publications

An improved predictive correlation for the induction time of CaCO3 scale formation during flow in porous media

An improved predictive correlation for the induction time of CaCO3 scale formation during flow in porous media

Coprecipitation of gadolinium with calcium sulphate dihydrate

Interpretation of Mineral Zoning in Submarine Hydrothermal Ore Deposits in Terms of Coupled Fluid Flow‐Precipitation Kinetics Model

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