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Keywords: adsorption
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Proceedings Papers

Paper presented at the SPE Oilfield Scale Symposium, June 5–6, 2024
Paper Number: SPE-218704-MS
... the SI retention is driven by both adsorption and precipitation of SI and SI-Ca/Mg complexes. To design and carry out this type of squeeze treatment, a comprehensive model capable of simulating SI retention in carbonate formations is required. In this study, a model has been developed to fully...
Proceedings Papers

Paper presented at the SPE Oilfield Scale Symposium, June 5–6, 2024
Paper Number: SPE-218746-MS
... for the adsorption of scale inhibitors [ 11 , 12 ]. Flush-type additives are typically included in the preflush stage [ 16 ] but can also be effective in the overflush stage [ 12 ], or even in both stages [ 17 ]. The study will investigate the pH effects of the inhibitor pill and evaluate the application...
Proceedings Papers

Paper presented at the SPE Oilfield Scale Symposium, June 5–6, 2024
Paper Number: SPE-218738-MS
...Static Adsorption The static adsorption experiments were performed using pure silica sand as the substrate. The sand was sieved to 100-250 µm and then washed with distilled water. The experiments were conducted at a fixed temperature of 31°C and, a mass/volume ratio (m/V) of m = 100g of silica...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, May 25–26, 2022
Paper Number: SPE-209496-MS
... been developed, characterised, and tested. Adsorption isotherms analysis, thermogravimetric analysis (TGA), dynamic tube blocking tests (TBT) and scanning electron microscopy (SEM) analysis have been carried out in order to assess the efficiency against zinc sulphide (ZnS) scale as well as adsorption...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200687-MS
... by increasing the scale inhibitor concentration in the main treatment slug; however, the increase in squeeze lifetime is greatly reduced at very high concentrations. Four generic scale inhibitors were used with different adsorption isotherms to validate these calculations. In cases where either V SI or V T...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200692-MS
... profile was established, the adsorption level, Г, was calculated as follows in Eq. 2 . Polymer flooding is a long standing Enhanced Oil Recovery (EOR) technology that has been reported in literature as early as the 1960s ( Pye, 1964 ; Sandiford, 1964 ). There has been considerable interest...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 20–21, 2018
Paper Number: SPE-190724-MS
... the study. We have performed simulations using a reactive transport simulator and heterogeneous 2D areal and vertical models and a field scale 3D model. Data from literature have been utilized to define parameters that control polymer viscosity, polymer adsorption and barium (Ba 2+ ) and sulphate (SO 4 2...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, May 11–12, 2016
Paper Number: SPE-179905-MS
... acid works by competitive adsorption with scale inhibitor onto ferric hydroxide particle surfaces. The impact of EDTA and citrate on reversing Fe(II) effect on scale inhibition is also discussed. water management oilfield chemistry scale inhibition adsorption scale remediation Production...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, May 11–12, 2016
Paper Number: SPE-179887-MS
... of the rock matrix with adsorption either onto the rock matrix or the fracture proppant or both; it was found that in some field cases there is negligible difference between inclusion or exclusion of proppant adsorption, whereas in others much better simulation of inhibitor returns is observed if proppant...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, May 11–12, 2016
Paper Number: SPE-179888-MS
... retention adsorption/desorption has been complemented over the years by enhanced adsorption via mutual solvent and full precipitation of the active inhibitor as calcium salt onto the mineral surface of the reservoir. This study has been conducted to understand if the retention of phosphonate and phosphate...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, May 14–15, 2014
Paper Number: SPE-169755-MS
..., adsorption of SI onto the rock is determined by an adsorption/desorption isotherm, assuming no hysteresis. Diffusion and adsorption are calculated simultaneously providing an in-depth reflection of the complex mechanisms occurring within the rock matrix. Abstract Scale Inhibitor (SI) squeeze treatments...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, May 14–15, 2014
Paper Number: SPE-169779-MS
... where Γ a p p = apparent adsorption, C o is the initial concentration of SI in the brine (in mg/L), C f is the final concentration, V is the volume in L, and m is mass of substrate in grams. Hence Г is reported in mg/g. Therefore, if the retention mechanism in a system...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, May 14–15, 2014
Paper Number: SPE-169763-MS
... adsorption scale inhibitor procedure organosilane carbon nanotube application PPCA squeeze treatment nanotechnology dispersion desorption nast concentration experiment squeeze lifetime nanotube society of petroleum engineers inhibitor single-walled carbon nanotube rock surface coreflood...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Scale, May 30–31, 2012
Paper Number: SPE-154953-MS
... compatibility, formation dissolution, dynamic tubing blocking, static adsorption and core flood tests will be presented, that will highlight the design and development of a polymeric scale inhibitor suitable for tight carbonate reservoirs while meeting the environmental requirements for application in the UK...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Scale, May 30–31, 2012
Paper Number: SPE-155109-MS
... Abstract The mechanism of retention of scale inhibitors (SI) within the reservoir formation is central to a squeeze treatment having a long lifetime. Scale inhibitors are retained within porous media by the two main mechanisms of adsorption (Γ) and precipitation...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Scale, May 30–31, 2012
Paper Number: SPE-155110-MS
... Abstract Scale inhibitors (SI) are retained in the reservoir formation by both adsorption (Γ) and precipitation (Π) mechanisms, and these are responsible for the duration of the squeeze lifetime. However, processes such as the adsorption of SI and dissolution of precipitated SI complexes...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Scale, May 30–31, 2012
Paper Number: SPE-156019-MS
... Abstract Addition of scale inhibitor into the reservoir allowing its adsorption and or precipitation into the rock formation and subsequent release during production is one of the most common treatments used in oil field industries to avoid scale formation. Little is known however about...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Scale, May 26–27, 2010
Paper Number: SPE-130702-MS
... a long lifetime. Scale inhibitors are retained within porous media by the two main mechanisms of " adsorption " (Γ) and " precipitation " (∏). There is not complete agreement in the literature about when we should use one mechanistic description or another. Field observations are not sufficiently...

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