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Keywords: precipitation
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Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200712-MS
... years we have used RTM to make scale predictions for several waterflooding projects around the globe. In this paper we will show results from these field cases and highlight the most important findings. In brief, these are: Enabling mineral precipitation reactions in flow calculations improves...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200690-MS
... The main reactions that occur between the injected high pH alkaline brine and the oil, brine and rock, are discussed here, highlighting the potential implications not only to oil recovery behaviour, which is the main objective of alkaline related floods, but also to the scale precipitation...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200714-MS
... concentration pipe scale formation production chemistry upstream oil & gas deposition pressure drop pressure distribution valve orifice particle size distribution scale inhibition precipitation flow rate experiment orifice reynolds number valve In the oil industry, inorganic scale...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200705-MS
... out at room temperature (21ºC), and the coreflood test was conducted at 60 ºC. Bottle tests mainly reflect the ability of the inhibitor to prevent scale precipitation in bulk solution, which and tube-blocking test mainly shows the capacity of the inhibitor to prevent scale deposition on tubing...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200707-MS
... precipitation precipitation equilibrium formation water sample drilling fluid formulation drawdown concentration production monitoring production chemistry complex reservoir high pressure high temperature formation water composition co 2 sample chamber composition formation water precipitation...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200679-MS
... at high temperature and possible evaporation of water is more likely to increase the concentrations ( Wat et al. 2010 ). Chemical reactions occur faster at high temperature (fast kinetics) and the normal slow precipitation of CaCO 3 involving several chemical reactions (CO 2 release, pH increase...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200664-MS
... solution, less deposit was collected in the test apparatus itself. The precipitate in the effluent samples (which had passed through the apparatus) was found to have a mean particle size in the region of 10 microns, with a significant proportion of the distribution of particles below 1 micron...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200657-MS
... systems often have a pre-treatment unit for controlled precipitation and subsequent removal of carbonates and hydroxides. The purpose is to avoid scaling in downstream process system. CaCO 3 is often the main solid removed in the pre-treatment. This study is on the effect of magnesium and iron(II) ions...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200666-MS
... for carbonate scaling in the mixing point at the wellhead and in the production pipeline. Scale calculations gives calcium carbonate saturation ratios at a level where scale formation is expected in produced water systems which indicate a need for scale inhibitor. It is assumed that precipitation of salts...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200695-MS
... (1) Ba 2 + ( aq ) + SO 4 2 − ( aq ) → BaSO 4 ( s ) Figure 1 Permeability map for the 2D areal model Figure 2 Permeability map for the 2D vertical model. Modelling BaSO 4 precipitation can be done by assigning...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200667-MS
... brine, resulting in the precipitation reaction of BaSO 4 , due to the incompatible mixing of formation and injected brines. Three two-dimensional models were considered, a homogeneous and heterogeneous areal model to compare polymer flooding and LSW; and a vertical heterogeneous model to analyse...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 20–21, 2018
Paper Number: SPE-190707-MS
... tests for evaluating the performance of SIs. However, it should be mentioned that the static bottle test cannot be considered to be representative of the dynamic field conditions and can only give an overview of the mechanism of halite scale precipitation and inhibition ( Lu et al., 2014...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 20–21, 2018
Paper Number: SPE-190711-MS
... the water chemistry is commonly measured at surface locations (e.g. at wellheads or separators), which means that then there is no information, per se , of the concentration of scaling ions that have precipitated upstream of the sampling point. However, the concentration of the ions prior to CaCO 3...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 20–21, 2018
Paper Number: SPE-190724-MS
... (BaSO 4 ) scale deposition is a serious problem encountered in oilfield operations. The precipitation of BaSO 4 scale has been studied mainly for fields under water flooding. On the other hand, polymer flooding is a mature Enhanced Oil Recovery (EOR) method that has been applied successfully in many...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 20–21, 2018
Paper Number: SPE-190737-MS
... Abstract Calcium carbonate (CaCO 3 ) scale can form through an "auto-scaling" process in production systems with a CO 2 -rich environment due to fluid (water/oil/gas) depressurisation. Thermodynamic modelling is used to estimate the amount and severity of CaCO 3 scale precipitation...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 20–21, 2018
Paper Number: SPE-190738-MS
... and to some extent hydroxides. This reduces the amount of scale that may form in the regeneration system. In the pre-treatment, alkalinity dosed as hydroxide and/or carbonate forces precipitation of calcium, strontium and iron carbonates and magnesium hydroxide. The supersaturation is generally so high...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 20–21, 2018
Paper Number: SPE-190756-MS
... Aberdeen international symposium oilfield chemistry scale inhibition precipitation sand screen shear stress scale deposition pilot rig Flow Condition turbulence Scale prediction models are based on thermodynamic calculations. They may be used to predict the excess solute...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 20–21, 2018
Paper Number: SPE-190725-MS
... Chemistry Upstream Oil & Gas precipitation scale sample composition calcium sulfate electric submersible pump calcium carbonate ESP seawater formation water asphaltene inhibition discharge pressure mineral precipitation caso 4 high temperature remediation of hydrates caco 3 oil...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 20–21, 2018
Paper Number: SPE-190739-MS
... scaling (salt precipitation). Fresh water is widely used to prevent halite scaling; however, initial treatment programs tend to "overtreat" the problem and leads to high operation and maintenance costs. An effort to improve halite scale management has been explored, which includes identification of wells...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 20–21, 2018
Paper Number: SPE-190715-MS
... treatment SLE international symposium reservoir Collin Sutherland squeeze lifetime retention carbonate reservoir hydrate inhibition asphaltene inhibition Sandstone Reservoir overflush stage enhancer return profile spe international symposium Symposium fracture precipitation Scale...

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