Cargando…

A mechanistic investigation of low salinity water flooding coupled with ion tuning for enhanced oil recovery

Oil recovery by low salinity water flooding (LSWF) from carbonate reservoirs has gained tremendous attention in recent years due to its cost-effectiveness and environment-friendly nature. The mechanisms of low salinity water flooding for enhanced oil recovery are very complex and depend on the miner...

Descripción completa

Detalles Bibliográficos
Autores principales: Saw, Rohit Kumar, Mandal, Ajay
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9057959/
https://www.ncbi.nlm.nih.gov/pubmed/35516738
http://dx.doi.org/10.1039/d0ra08301a
_version_ 1784698016947503104
author Saw, Rohit Kumar
Mandal, Ajay
author_facet Saw, Rohit Kumar
Mandal, Ajay
author_sort Saw, Rohit Kumar
collection PubMed
description Oil recovery by low salinity water flooding (LSWF) from carbonate reservoirs has gained tremendous attention in recent years due to its cost-effectiveness and environment-friendly nature. The mechanisms of low salinity water flooding for enhanced oil recovery are very complex and depend on the mineralogy of the formation rock, properties of injection brine and reservoir fluids. The present work aimed at the optimization of salinity and concentration of potential determining ions (PDIs) in injection water for enhanced oil recovery from carbonate reservoirs. Initially, we conducted a series of experiments on the dilution effect of seawater (SW) with the help of rock/fluid and fluid/fluid interactions via interfacial tension (IFT), zeta potential and contact angle measurements. This offered an optimum salinity (20dSW) with an 11% increase in recovery of the original oil in place (OOIP) over the SW injection in secondary flooding mode. Then, the ion tuning was done on the optimum salinity (20dSW) by manipulating the PDIs (Ca(2+), SO(4)(2−) and Mg(2+)) while keeping ionic strength constant. The properties of ion tuned brine were optimized by zeta potential and contact angle measurements. The core flooding experiments performed with the injection of designed ion tuned water obtained by dilution and ion tuning of SW showed more than 20% OOIP as incremental recovery over the SW injection. Effluent analysis after the flooding confirms that the main mechanisms for enhanced oil recovery include calcite dissolution and wettability alteration due to interplay of PDIs.
format Online
Article
Text
id pubmed-9057959
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher The Royal Society of Chemistry
record_format MEDLINE/PubMed
spelling pubmed-90579592022-05-04 A mechanistic investigation of low salinity water flooding coupled with ion tuning for enhanced oil recovery Saw, Rohit Kumar Mandal, Ajay RSC Adv Chemistry Oil recovery by low salinity water flooding (LSWF) from carbonate reservoirs has gained tremendous attention in recent years due to its cost-effectiveness and environment-friendly nature. The mechanisms of low salinity water flooding for enhanced oil recovery are very complex and depend on the mineralogy of the formation rock, properties of injection brine and reservoir fluids. The present work aimed at the optimization of salinity and concentration of potential determining ions (PDIs) in injection water for enhanced oil recovery from carbonate reservoirs. Initially, we conducted a series of experiments on the dilution effect of seawater (SW) with the help of rock/fluid and fluid/fluid interactions via interfacial tension (IFT), zeta potential and contact angle measurements. This offered an optimum salinity (20dSW) with an 11% increase in recovery of the original oil in place (OOIP) over the SW injection in secondary flooding mode. Then, the ion tuning was done on the optimum salinity (20dSW) by manipulating the PDIs (Ca(2+), SO(4)(2−) and Mg(2+)) while keeping ionic strength constant. The properties of ion tuned brine were optimized by zeta potential and contact angle measurements. The core flooding experiments performed with the injection of designed ion tuned water obtained by dilution and ion tuning of SW showed more than 20% OOIP as incremental recovery over the SW injection. Effluent analysis after the flooding confirms that the main mechanisms for enhanced oil recovery include calcite dissolution and wettability alteration due to interplay of PDIs. The Royal Society of Chemistry 2020-11-24 /pmc/articles/PMC9057959/ /pubmed/35516738 http://dx.doi.org/10.1039/d0ra08301a Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/
spellingShingle Chemistry
Saw, Rohit Kumar
Mandal, Ajay
A mechanistic investigation of low salinity water flooding coupled with ion tuning for enhanced oil recovery
title A mechanistic investigation of low salinity water flooding coupled with ion tuning for enhanced oil recovery
title_full A mechanistic investigation of low salinity water flooding coupled with ion tuning for enhanced oil recovery
title_fullStr A mechanistic investigation of low salinity water flooding coupled with ion tuning for enhanced oil recovery
title_full_unstemmed A mechanistic investigation of low salinity water flooding coupled with ion tuning for enhanced oil recovery
title_short A mechanistic investigation of low salinity water flooding coupled with ion tuning for enhanced oil recovery
title_sort mechanistic investigation of low salinity water flooding coupled with ion tuning for enhanced oil recovery
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9057959/
https://www.ncbi.nlm.nih.gov/pubmed/35516738
http://dx.doi.org/10.1039/d0ra08301a
work_keys_str_mv AT sawrohitkumar amechanisticinvestigationoflowsalinitywaterfloodingcoupledwithiontuningforenhancedoilrecovery
AT mandalajay amechanisticinvestigationoflowsalinitywaterfloodingcoupledwithiontuningforenhancedoilrecovery
AT sawrohitkumar mechanisticinvestigationoflowsalinitywaterfloodingcoupledwithiontuningforenhancedoilrecovery
AT mandalajay mechanisticinvestigationoflowsalinitywaterfloodingcoupledwithiontuningforenhancedoilrecovery