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Keywords: concentration
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Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200710-MS
... suggested that there was not published data for laboratory tests and field squeeze data for the inhibition of FeCO 3 and CaCO 3 scales in gas wells for the Middle East region. Table 1 Brine chemistry. Ion Concentration Unit Sodium (Na + ) 51000 (mg/l) Magnesium (Mg 2+ ) 146...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200660-MS
... Abstract Scale formation is mostly governed by scaling ion concentrations and fluid conditions (pressure, temperature, and pH). Sulfide scale formation is most commonly initiated through the mixing fluids containing scaling cations (Fe 2+ , Zn 2+ and Pb 2+ ) or sulfidic anions (H 2 S (aq) , HS...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200684-MS
... chemistry asphaltene remediation asphaltene inhibition production monitoring reservoir characterization hydrate remediation hydrate inhibition scale remediation pvt measurement oilfield chemistry remediation of hydrates calculation co 2 workflow scenario concentration scale prediction...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200655-MS
... Abstract The production of high salinity brines (Total Dissolved Solids (TDS) > 250,000 ppm) during oil and gas production is known to cause severe scaling issues. When high TDS conditions are coupled with high concentrations of dissolved iron in a produced water, the challenges...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200677-MS
... inhibition scale remediation production chemistry scale inhibition corrosion management concentration experiment baronia sw breakthrough heriot-watt university siderite core pack sulfide species remediation of hydrates siderite pack solubility dissolution precipitation surface displacement...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200662-MS
... The anionic solution was prepared by dissolving certain amount of sodium bicarbonate (NaHCO 3 ) in 1 M sodium chloride (NaCl). The hydrochloride acid (HCl) stock solutions with concentrations from 0.01 – 1 M were prepared by diluting from 1 N standardized HCl (Fisher Chemicals). The cationic...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200690-MS
... pH drops below 10-11.5, depending on its concentration. Also, silica dissolution and the drop in pH are faster at higher temperatures ( Bunge and Radke, 1982 and Southwick, 1985 ). The inorganic scale precipitation is a major flow assurance drawback in AS and ASP flooding process...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200706-MS
.... The dispersant efficiency depends on the scale particle size, and larger particle sizes usually require higher dispersant dosages. Other factors that may influence the inhibitor dosage include reactant concentrations (cations and anions), pH, salinity and inhibition time. These factors were investigated using...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200670-MS
... ). Therefore, small changes in ion concentrations, temperature, and pressure have significant impacts on the saturation level of solution so that barite can be readily precipitated in production wells. There are several effective threshold inhibitors containing anionic groups of phosphonates, carboxylates...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200714-MS
... hydrate remediation production control artificial intelligence wax remediation reservoir surveillance oilfield chemistry asphaltene remediation remediation of hydrates calcium carbonate saturation index procedure sleeve valve hydrate inhibition asphaltene inhibition concentration brine...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200699-MS
... uncertainty for scale prediction. Another challenge is scale prediction in brine with high TDS, especially with high calcium concentration. Thermodynamic data with common ions Ca 2+ and SO 4 2- is needed to improve thermodynamic models. The objective of this paper is to extend our knowledge...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200685-MS
... the minimum inhibitor concentration, which costs a lot of money, time and chemicals. There have been some studies carried out to extend the release life of DTPMP, but none was able to get into a level that can be scalable and proven in the field. Taking into consideration those facts, an extended release...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200705-MS
... 2+ concentration of sample was measured by inductively coupled plasma-optical emission spectrometry (Agilent ICP-OES 5110). The inhibition efficiency (IE, %) is defined as follows: I E = c ( t ) - c b ( t ) c ( 0 ) - c b ( t ) x 100 where c ( t...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200701-MS
... for the determination of returning residual concentrations. Scale squeeze treatments have in general been designed to treat between 6 to 12 months of water production before either the production layer or bulk produced water composition falls below minimum inhibitor concentration (MIC). In this paper examples...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200671-MS
... scaling and inhibition by changing the cations and anions concentrations of the solutions. Prior to the experiment, a hot plate with aluminum block or oil bath is set to the required temperature and allowed to stabilize around 30 mins. The laser sources are turned on to 15-30 min prior to the experiment...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200692-MS
... squeeze lifetime, believed to be due to reduction of adsorption sites by HPAM. However, this impact could be countered by injecting this type of scale inhibitor at a low pH (e.g. pH 2). Static tests performed alongside the corefloods show that even low inhibitor concentrations (as found in SI pre-flushes...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200715-MS
...-isotherm adsorption, commonly derived from coreflooding experiments, although in some certain circumstances a new isotherm will need to be re-derived to match the field return concentration profile, once the treatment is deployed and samples are collected to measure SI return concentration. This new...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200707-MS
... Range of reservoir formation water ion concentrations used in simulations. For those simulations undertaken assuming equilibrium with calcite in the reservoir, it was also assumed that the formation water was in equilibrium with reservoir petroleum. The ‘base’ petroleum composition...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200656-MS
... of formation water and injection seawater. Sample location Degasser Vessel mixed well fluids Scale inhibitor applied yes, continual injection, inhibitor concentration > minimum inhibitor concentration (MIC) Sample location Test Separator single well flowing Scale inhibitor applied yes...
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...

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