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Keywords: equation
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Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200662-MS
... concentration test method inhibition model barite inhibition model calcite nucleation model inhibition experiment equation society of petroleum engineers Barite (BaSO 4 ) and calcite (CaCO 3 ) are two of the most common scales in the oilfield, and their formation can cause decrease in production...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200699-MS
... prediction coefficient barite interaction reactor solubility speciation activity coefficient concentration prediction pitzer model solubility prediction solubility data equation The risk of scale formation in produced water have increased concern for oil and gas industry costing millions...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200687-MS
... simulation equation society of petroleum engineers asphaltene inhibition adsorption isotherm isotherm total cost squeeze treatment Mineral scale formation is one of the most problematic forms of formation damage in the oil industry; it can deposit scales in any parts of the production system...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200689-MS
... inhibition scale inhibition remediation of hydrates deposition petrobras scale formation federal university particle scenario agglomerate discrete element method valve inner sleeve case 1 society of petroleum engineers equation The identification of scaling hot spots is advantageous...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 20–21, 2018
Paper Number: SPE-190699-MS
... methods. This method has been proposed by Geraldes and Dina Afonso (2007 ). It takes into account the hydrodynamic conditions but also the electro-neutrality condition of the solution. For a solution with n ionic components, the method consists of solving a system of n + 1 equations with n + 1...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 20–21, 2018
Paper Number: SPE-190754-MS
... The thermodynamic properties of aqueous electrolytes solution deviate from ideality due to the interactions among solutes and solvent even at relatively low concentrations and such non-ideality has to be considered. The Pitzer equations have been widely adopted to model the non-ideality...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 20–21, 2018
Paper Number: SPE-190711-MS
... modelling is based on solving a nonlinear system of equations consisting of: i) acid equilibrium reactions; ii) mineral precipitation reactions; iii) mass balance equations; and iv) the equation for the electrical neutrality of solutions (or, in general, a charge balance equation). Acid equilibrium...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 20–21, 2018
Paper Number: SPE-190737-MS
... degree of super-saturation is coupled with the Heriot-Watt FAST Scale Prediction model (HW FAST). HW FAST uses the Pitzer equations and the Peng-Robinson Equation of State to model, respectively, the aqueous and hydrocarbon phases (gas and oil), and it has been developed to calculate CaCO 3 scaling...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 20–21, 2018
Paper Number: SPE-190726-MS
.../complexes. Moreover, within each software we can select a large number of different Equations of State (EOS), activity models, equilibrium parameters etc., which may ultimately impact the final carbonate and sulphide scale prediction profile. The questions we try to answer in this work are: How important...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 20–21, 2018
Paper Number: SPE-190744-MS
... Pitzer's equation based thermal dynamic models are widely used for solubility prediction, as a semi-empirical model, the accuracy of viral coefficents as well as their temperature and pressure dependence paramaters relies on experimental data on certain P-T-X regime. However, in extreme...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Scale, May 30–31, 2012
Paper Number: SPE-154980-MS
... h2s management deposition formation damage shedid permeability ratio verse production time reservoir saturation equation gas reservoir elemental sulphur sulphur deposition corrosion inhibition upstream oil & gas radial distance flow rate permeability society of petroleum engineers...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Scale, May 30–31, 2012
Paper Number: SPE-155111-MS
... inhibition kinetic dissolution model precipitation simple model transport model radial system symposium squeeze treatment scale inhibitor kinetic precipitation damköhler number precipitate precipitation squeeze equation steady-state solution It is well established that scale inhibitors...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Scale, May 26–27, 2010
Paper Number: SPE-131158-MS
... in detail. Furthermore, the experimental results were fitted with a 1-D advective and dispersion equation combined with a first-order removal term to obtain important transport parameters for NPs that did not aggregate. More complicated models are being developed to capture the unusual breakthrough curves...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Scale, May 26–27, 2010
Paper Number: SPE-130702-MS
...), the application of this coupled model in a sensitivity study of field squeeze treatments is described. rate constant concentration calculation upstream oil & gas precipitation model numerically adsorption remediation of hydrates equation hydrate remediation production chemistry adsorption...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference, May 28–29, 2008
Paper Number: SPE-114108-MS
... of hydrates concentration experiment paraffin remediation Hydrate Remediation hydrate inhibition asphaltene inhibition adsorption isotherm apparent adsorption chlorite ph 6 Adsorption Precipitation muscovite siderite mineral precipitate Si concentration equation SPE 114108 Coupled...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference, May 28–29, 2008
Paper Number: SPE-113595-MS
... asphaltene remediation remediation of hydrates asphaltene inhibition blpd detection scale deposition wellbore heat capacity Production Chemistry Upstream Oil & Gas equation Thickness temperature difference temperature profile scale inhibition temperature increase dts resolution 0 heat...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference, May 28–29, 2008
Paper Number: SPE-114034-MS
... Production Chemistry Upstream Oil & Gas oilfield chemistry rock/fluid interaction concentration naphthenate formation pH value equation fluid compatibility precipitation experiment naphthenic acid naphthenic acid concentration equilibrium acid pH change experiment deposit...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Symposium, May 31–June 1, 2006
Paper Number: SPE-100521-MS
... made to propose safer alternative treatments involving non-aqueous scale inhibitors, firstly proposed in the 1990's (See review in Ref. 1). In this paper, a brief description is presented of the fundamental equations describing two-phase flow and inhibitor transport through porous media. The inhibitor...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Symposium, May 31–June 1, 2006
Paper Number: SPE-100522-MS
... of the equation has been tested between 4–200ºC and 1–6 M ionic strength. Barite solubility is significantly reduced, by as much as 20 fold, with 50% (v/v) methanol. Other mineral solubilities are also reduced significantly. Ethylene glycol has much less impact on mineral solubility than methanol. Good agreements...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Symposium, May 31–June 1, 2006
Paper Number: SPE-100611-MS
... sulphates[1–3]. Decision making on scale prevention and removal is based on prediction of scaling formation damage provided by mathematical modelling. The mathematical models for sulphate scaling during waterflood consist of mass balance equations for all species with the reaction rate sink terms[8–10,15...

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