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Experimental investigation of inorganic scale deposition during smart water injection - A formation damage point of view
, Article IOR NORWAY 2017 - 19th European Symposium on Improved Oil Recovery: Sustainable IOR in a Low Oil Price World, 24 April 2017 through 27 April 2017 ; 2017 ; 9789462822092 (ISBN) ; Mokhtari, R ; Ayatollahi, S ; Riahi, S ; Malekzade, E ; Sharif University of Technology
Abstract
Smart water injection is determined as an effective EOR process to change the wettability and interfacial tension for better micro/macro sweep efficiencies. This water contains reactive ions such as Mg ∧(2+), Ca ∧(2+) and SO-4 ∧(2-) which can act as potential determining ions and change the surface charge of calcite rocks. One of the major concerns in the execution of an effective waterflood, especially in tight carbonate reservoirs, is the incompatibility between the formation brine and the injecting water. This research work aims to investigate the most important challenge of waterflooding process related to the possible formation damage because of inorganic scale deposition during...
Microscopic insight into kinetics of inorganic scale deposition during smart water injection using dynamic quartz crystal microbalance and molecular dynamics simulation
, Article Industrial and Engineering Chemistry Research ; Volume 59, Issue 2 , 2020 , Pages 609-619 ; Kargozarfard, Z ; Najafi, B ; Taghikhani, V ; Ayatollahi, S ; Sharif University of Technology
American Chemical Society
2020
Abstract
Inorganic scale deposition has been found to affect many industrial processes, including water injection into the oil reservoirs. The incompatibility of high sulfate ion content of seawater with formation water containing calcium ions results in formation damage and production decline. In this study, several simultaneous techniques are utilized for qualitative and quantitative analyses of calcium sulfate scale to get more insight into the formation damage during smart water flooding at micro and nanoscales. In the experimental section, calcium sulfate deposition due to the mixing of the formation water and seawater samples was investigated using the dynamic quartz crystal microbalance...
Effect of salinity and ion type on formation damage due to inorganic scale deposition and introducing optimum salinity
, Article Journal of Petroleum Science and Engineering ; Volume 177 , 2019 , Pages 270-281 ; 09204105 (ISSN) ; Riahi, S ; Ayatollahi, S ; Mokhtari, R ; Sharif University of Technology
Elsevier B.V
2019
Abstract
Smart water injection is recognized as an effective EOR process to alter the wettability and interfacial tension to obtain higher micro/macro sweep efficiencies. This water contains reactive ions such asMg2+, Ca2+ andSO42- which can act as potential-determining ions and change the surface charge of calcite rocks. One of the major concerns in the execution of an effective water-flood process, especially in tight carbonate reservoirs, is the chemical incompatibility between the formation brine and the injecting water. In the present study, laboratory fluid compatibility tests were carried out and software simulation was done to investigate the most important challenges of the water-flooding...