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Keywords: solubility
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Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, April 8–9, 2019
Paper Number: SPE-193562-MS
... gradients along the flow path. The temperature variation has an impact on CO 2 solubility and the kinetics of any mineral reactions. Core flood experiments and associated reactive transport simulations were conducted to analyse thermal effects during CO 2 injection in a dolomitic limestone aquifer...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, April 8–9, 2019
Paper Number: SPE-193573-MS
... such as chelating agent and ammonium chloride helped in raising the THPS dissolving power. However, the addition of phosphonate resulted in decreasing of the scale solubility. Furthermore, the effect of mineralogy on the dissolution in THPS was studied, while iron oxyhydroxides, calcite, siderite...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, April 8–9, 2019
Paper Number: SPE-193564-MS
...Abstract Abstract Accurate scale prediction modelling is only possible when reliable mineral solubility data are available under the required conditions. It is recognised that the relative paucity of high pressure, high temperature (HPHT) solubility data can result in inaccurate predictions...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, April 8–9, 2019
Paper Number: SPE-193559-MS
... Some inorganic salts show a strong tendency to dissolve in organic solvents. The bromide salts of alkali and alkali earth metals show the larger anion offers better solubility in lower polarity solvents ( Pinho and Macedo 2002 ). Nature of cation-anion interaction also affects salt solubility...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, April 8–9, 2019
Paper Number: SPE-193566-MS
.... The removal of barium sulfate from calcium carbonate formation is a challenging problem because of the solubility of calcium carbonate is higher compared to that of barium sulfate in different acids. In addition, barium sulfate is not soluble in the regular acids such as hydrochloric (HCl) acid and other...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, April 8–9, 2019
Paper Number: SPE-193612-MS
... & Gas polarity paraffin remediation wax inhibition asphaltene remediation remediation of hydrates electric field strength particle conductivity electrodeposition process electrodeposition fraction asphaltene inhibition solvent polarity solubility crude oil molecular composition toluene...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, April 8–9, 2019
Paper Number: SPE-193630-MS
... In this work, we have developed a reliable anoxic plug flow reactor using argon gas to remove oxygen and PIPES or MES buffer to control pH, this apparatus can overcome most of the above challenges. The FeS precipitation kinetics, FeS(mackinawite) solubility and FeS phase transformation were...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, April 3–5, 2017
Paper Number: SPE-184517-MS
... oilfield condition. The dependence of Pitzer's coefficients for ion activity coefficients on temperature and pressure was examined and incorporated into the model, which provides reliable predictions of solubilities and density that are consistent with over 5000 literature data at all conditions tested...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, April 3–5, 2017
Paper Number: SPE-184509-MS
... and thus the remaining sulphide reacted with Zn to form ZnS. On the other hand, when both Zn and Pb existed in excess to sulphide, single PbS formed despite the fact that both scales have very low solubility. Similar behaviour was observed when the temperature was increased from 50 to 95°C and GFW was used...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, April 3–5, 2017
Paper Number: SPE-184567-MS
... carbonation well cement porosity solubility calcium silicate hydrate dissolution compressive strength degradation hydrate gas composition permeability Introduction Cement is the wellbore material used to seal the annular area between casing and formation. Over the life of the well, cement...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, April 3–5, 2017
Paper Number: SPE-184568-MS
...Abstract Abstract The relative paucity of reliable experimental data for calcium sulphate solubility under ultra HPHT conditions and in complex brines characteristic of oilfield formation waters means that scale-prediction models used to design and manage such fields are compromised by the need...
Proceedings Papers

Paper presented at the SPE International Symposium on Oilfield Chemistry, April 13–15, 2015
Paper Number: SPE-173738-MS
... The properties of a cationic surfactant (S ADBAC ) and an anionic surfactant (S MES ) are first studied. See more details about these two surfactants in Table 1 . The effect of mixing ratio (S MES /S ADBAC ) from 4:1 through 1:4 on the solubility of the mixtures was visually analyzed. Contents...
Proceedings Papers

Paper presented at the SPE International Symposium on Oilfield Chemistry, April 13–15, 2015
Paper Number: SPE-173751-MS
.... These limitations include: low dissolving power, product solubility, stability, biodegradability, and the inevitable cost of additives necessary to mitigate corrosion problems. This work proposes a new mixture of lactic and gluconic acids which offers favorable technical characteristics and excellent health...
Proceedings Papers

Paper presented at the SPE International Symposium on Oilfield Chemistry, April 13–15, 2015
Paper Number: SPE-173791-MS
... or banned entirely. Still another disadvantage of conventional NPG surfactants is their poor solubility in highly concentrated salt solutions, such as those high density brines used in wellbore service fluids, and their poor solubility in acidizing solutions. Thus, there is a need for gellants...
Proceedings Papers

Paper presented at the SPE International Symposium on Oilfield Chemistry, April 13–15, 2015
Paper Number: SPE-173752-MS
... Upstream Oil & Gas concentration acid benzoic acid hydraulic fracturing Novel Approach crosslinker solubility crosslink delay proppant polymer cmc zirconium crosslinker loading rheology performance slurry solid acid vortex closure fracturing fluid organic acid zirconium cellulose...
Proceedings Papers

Paper presented at the SPE International Symposium on Oilfield Chemistry, April 13–15, 2015
Paper Number: SPE-173785-MS
... iron precipitation Tomson corrosion inhibition efficiency Fe concentration hydrate inhibition asphaltene inhibition concentration scale inhibitor solubility iron concentration anoxic condition Introduction Importance of strictly anoxic conditions In order to study the nucleation...
Proceedings Papers

Paper presented at the SPE International Symposium on Oilfield Chemistry, April 13–15, 2015
Paper Number: SPE-173803-MS
... mineral solubilities and other chemical properties. However, the experimental data were limited at temperature, pressure, and ionic strength that were clearly below that typically encountered in deepwater production. Therefore, extending the existing thermodynamic models to HTHP applications...
Proceedings Papers

Paper presented at the SPE International Symposium on Oilfield Chemistry, April 8–10, 2013
Paper Number: SPE-164045-MS
... are limited by lack of experimental data and inadequate understanding of modeling parameters. With a new apparatus, solubilities of barite and calcite were measured at temperatures up to 250°C, pressures up to 22000 psi, and ionic strength up to 6 m NaCl and in the presence of elevated concentrations of mixed...
Proceedings Papers

Paper presented at the SPE International Symposium on Oilfield Chemistry, April 8–10, 2013
Paper Number: SPE-164067-MS
... Inhibition Reservoir Surveillance Upstream Oil & Gas H2S management Workplace Hazard enhanced recovery PVT measurement Hydrogen Sulfide concentration Henry solubility partition coefficient production rate ionic strength ionic species coefficient production monitoring Production Chemistry...
Proceedings Papers

Paper presented at the SPE International Symposium on Oilfield Chemistry, April 11–13, 2011
Paper Number: SPE-140751-MS
... as wurtzite, a form of zinc sulfide scale. Extensive laboratory testing considered acid solubility and other scale-removal issues at downhole temperature and pressure conditions, as compared to the theoretical solubility of zinc sulfide in HCl acid. The study also determined that other factors may affect...

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