TY - JOUR
T1 - Real-time synchrotron-based X-ray computed microtomography during in situ emulsification
AU - Alzahid, Yara A.
AU - Aborshaid, Hussain
AU - Asali, Mohanad
AU - McClure, James
AU - Chen, Cheng
AU - Mostaghimi, Peyman
AU - Da Wang, Ying
AU - Sun, Chenhao
AU - Armstrong, Ryan T.
N1 - Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/12
Y1 - 2020/12
N2 - Molecular-level forces experienced by a surfactant during emulsification can have a significant impact on emulsion structure and effective properties. Understanding the interplay of molecular-level forces and effective phase properties during in situ emulsification is a fundamental question relevant to various subsurface engineering applications. Herein, we use dynamic synchrotron-based X-ray microtomography to capture flow dynamics during an oil emulsification process, whereby brine salinity influences the predominate molecular-level forces. We measure oil recovery, phase viscosities, phase morphologies, contact angles and water relative permeability to elucidate the underlying oil recovery mechanisms. Optimum salinity formed a stable emulsion phase with ultra-low interfacial tension, viscosity high enough to reduce the mobility of the injected solution and a reduced adhesive force that resulted in less contact between oil and solid grains. These mechanisms are attributed to favorable flow dynamics that lead to improved oil recovery that can be tuned by brine salinity.
AB - Molecular-level forces experienced by a surfactant during emulsification can have a significant impact on emulsion structure and effective properties. Understanding the interplay of molecular-level forces and effective phase properties during in situ emulsification is a fundamental question relevant to various subsurface engineering applications. Herein, we use dynamic synchrotron-based X-ray microtomography to capture flow dynamics during an oil emulsification process, whereby brine salinity influences the predominate molecular-level forces. We measure oil recovery, phase viscosities, phase morphologies, contact angles and water relative permeability to elucidate the underlying oil recovery mechanisms. Optimum salinity formed a stable emulsion phase with ultra-low interfacial tension, viscosity high enough to reduce the mobility of the injected solution and a reduced adhesive force that resulted in less contact between oil and solid grains. These mechanisms are attributed to favorable flow dynamics that lead to improved oil recovery that can be tuned by brine salinity.
KW - Emulsification
KW - Enhanced oil recovery
KW - Micro-tomography
KW - Phase behavior
KW - Surfactant
UR - http://www.scopus.com/inward/record.url?scp=85091042604&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85091042604&partnerID=8YFLogxK
U2 - 10.1016/j.petrol.2020.107885
DO - 10.1016/j.petrol.2020.107885
M3 - Article
AN - SCOPUS:85091042604
SN - 0920-4105
VL - 195
JO - Journal of Petroleum Science and Engineering
JF - Journal of Petroleum Science and Engineering
M1 - 107885
ER -