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Keywords: calculation
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Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200684-MS
... of the hydrocarbon phases, in order to derive the correct data input for the software from available field data. Using this input, reliable scale prediction calculations may then be run using either integrated or separate PVT and scale prediction software. Although some carbonate scale prediction methods have been...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200679-MS
... wells have been correlated to thermodynamic calculations, Table 1 . The experiences indicate that high-pressure, high-temperature fields are at more risk of scale formation and formation damage in the near wellbore area giving reduced productivity. Low productivity formations may require high pressure...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200664-MS
... production chemistry upstream oil & gas paraffin remediation wax inhibition asphaltene remediation hydrate remediation precipitation calculation experiment emd active test apparatus remediation of hydrates experiment 6 input concentration apparatus deposition effluent sample experiment 5...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 20–21, 2018
Paper Number: SPE-190711-MS
... For further information on building a scale prediction model, readers are referred to Rafal et al. (1994), Kaasa (1998), Pedersen et al. (2015), and Silva (2017) . In addition, the calculation of CaCO 3 scaling potential at each point in the production system assumes the knowledge...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 20–21, 2018
Paper Number: SPE-190737-MS
... in this context in order to design scale inhibitor or other types of treatments. However, field experience has indicated that thermodynamic calculations often lead to an overestimation of the calcite scale problem. One possible source of this discrepancy may be due to kinetic effects; i.e. that the calcite...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 20–21, 2018
Paper Number: SPE-190726-MS
... Abstract Predicting the formation of pH- dependent scales such as carbonates and sulphides requires a full calculation of all hydrocarbon and aqueous phases present to determine the distribution and speciation of CO 2 and H 2 S in the system. Several commercially available software packages...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, May 11–12, 2016
Paper Number: SPE-179893-MS
... in equilibrium with a gas phase containing 80% and 1% molar CO 2 , respectively). Then, we used the reactive transport model to evaluate the tranposrt of components and the rock-brine interactions in the reservoir. In our calculations, we were especially interested in the water composition in the last block...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, May 11–12, 2016
Paper Number: SPE-179904-MS
.... The equilibrium measurements and extrapolated calculations are in reasonable agreement with field observations assuming sulphide minerals are in equilibrium with the produced brine at reservoir conditions. Research showed that colloidal dispersion phenomena and other specific interactions might play a significant...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, May 11–12, 2016
Paper Number: SPE-179871-MS
... and effect of the acid gases (CO 2 and H 2 S), are important in devising and implementing the correct sulphide scale control program. In this paper, a PVT software package was used to take production data and model water condensation/evaporation, calculate gas compositional changes and CO 2 /H 2 S...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, May 11–12, 2016
Paper Number: SPE-179885-MS
... Abstract Vapour-Liquid Equilibria (VLE) calculations, particularly involving the phase behaviour of CO 2 and H 2 S, are used in scale prediction modelling. In this work, the impact of VLE calculations for CO 2 and H 2 S-rich gas phases and for acid and sour gas mixtures on scale prediction...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Scale, May 26–27, 2010
Paper Number: SPE-130567-MS
... in using Utsira formation water (UW; low SO 4 ) as opposed to seawater as the injection water. Thermodynamic calculations indicated that whether SW or UW is injected, the principle scaling risks are from BaSO 4 and CaCO 3 deposition. Being more difficult to treat, the study focused on the BaSO 4 risk...
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 Conference on Oilfield Scale, May 26–27, 2010
Paper Number: SPE-130703-MS
... in the related Paper I (SPE 130702). Here, we describe a wide range of sensitivity calculations using this model which illustrate both (i) the consequences of this model in laboratory core floods, and (ii) the field predictions which results from various assumptions about field adsorption/precipitation processes...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference, May 28–29, 2008
Paper Number: SPE-113109-MS
... block flow in porous media scale inhibition remediation of hydrates calculation wax remediation Hydrate Remediation Production Chemistry waterflooding Fluid Dynamics injection production well scale deposition formation water deposition strontium sulphate water injection Oil Recovery...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Symposium, May 31–June 1, 2006
Paper Number: SPE-100631-MS
... in this manuscript. flow in porous media calculation Upstream Oil & Gas shear enhanced recovery spe 100631 acid chemical placement porosity surfactant viscosity boundary length Fluid Dynamics Newtonian salinity shear rate crossflow squeeze treatment reservoir permeability zone...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Symposium, May 31–June 1, 2006
Paper Number: SPE-100520-MS
... and radial systems are also very similar under viscous slug injection with and without crossflow and this is not the case. water management oilfield chemistry flow in porous media enhanced recovery Fluid Dynamics newtonian case calculation permeability layer flow rate slug heterogeneous...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Symposium, May 31–June 1, 2006
Paper Number: SPE-100480-MS
... multiple flow lines connecting injection wells. Subsea intervention to place squeeze inhibitors is prohibitively expensive due to the requirement of utilizing a service boat over the well for many days.[1] Calculations of scaling index from formation and injected seawater mixtures are routinely based upon...
Proceedings Papers

Paper presented at the SPE International Symposium on Oilfield Scale, May 11–12, 2005
Paper Number: SPE-94578-MS
... scale precipitation oilfield chemistry production monitoring calcite wax inhibition wax remediation scale problem formation damage calculation expansion precipitation upstream oil & gas scale inhibition scale remediation production logging paraffin remediation production chemistry...
Proceedings Papers

Paper presented at the SPE International Symposium on Oilfield Scale, May 11–12, 2005
Paper Number: SPE-95107-MS
... of the injected sea water (SW), by the application of chemical scale inhibitors either by downhole squeezing or by injection at various points in the system, using inhibitor impregnated solids in the gravel pack etc. upstream oil & gas refinement calculation scale deposition absolute time...
Proceedings Papers

Paper presented at the SPE International Symposium on Oilfield Scale, May 26–27, 2004
Paper Number: SPE-87446-MS
... is caused by the triazine, which is part of the H 2 S scavenger package (used to remove H 2 S from some of the sour gas production), and by-products originating from the reaction of triazine (an amine) with H 2 S. The CaCO 3 scaling tendencies and indices as calculated by scaling software (ScaleChem...

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