Advancing the use of natural surfactants in enhanced oil recovery is crucial for sustainable practices in the oil and gas industry.This research assesses the applicability of neem-derived natural surfactants in offsho...Advancing the use of natural surfactants in enhanced oil recovery is crucial for sustainable practices in the oil and gas industry.This research assesses the applicability of neem-derived natural surfactants in offshore fields,encompassing surfactant synthesis via saponification,characterization through FT-IR,SEM,and EDS,and measuring surface and interfacial tension across various conditions.Adsorption studies determined the surfactant's adsorption characteristics onto rock,and core flooding tests assessed its efficacy.Surface tension measurements in deionized water(DIW)and brine confirmed the surfactant's surface activity.As the concentration increased from 1 wt%to 6 wt%,the interfacial tension(IFT)significantly decreased from 22.5 mN/m to 7.9 mN/m,marking a 64.8%reduction.Additionally,surfactants formed micelles more efficiently in saline water,with the critical micelle concentration(CMC)dropping from 4.0 wt%in DIW to 0.9 wt%.Adsorption on limestone showed over 50%higher adsorption than sandstone,confirming stronger interactions and higher adsorption saturation.Core flooding experiments demonstrated the surfactant's effectiveness in oil and water-wet conditions.When injected into sandstone,the surfactant achieved a significant additional oil recovery of 24.6%in deionized water,compared to 10.2%in limestone.Conversely,in saline conditions,the surfactant's performance was better in limestone,achieving an additional recovery of 4.9%,whereas in sandstone,it was only 1.6%.This research offers a unique perspective on how natural surfactants perform across different rock types.The findings suggest that neem-derived surfactants hold significant promise for enhancing oil recovery in Kazakhstan's oil fields.展开更多
In chemical enhanced oil recovery(CEOR),it is very important to utilize the excessive usage of chemicals.A great opportunity lies in adopting natural surfactants,since it is cheaper,ecosystem friendly,and less toxic t...In chemical enhanced oil recovery(CEOR),it is very important to utilize the excessive usage of chemicals.A great opportunity lies in adopting natural surfactants,since it is cheaper,ecosystem friendly,and less toxic than their counterpart synthetic surfactants.Despite the availability of natural surfactant sources,it is yet very early to decide on their applicability.Therefore,this research focuses on natural-saponin extracted from different raw materials available in the Middle East and their interaction with quartz-sand.A special focus was given to the adsorption isotherm models to describe the interaction with the reservoir rocks.Three raw materials were investigated are fenugreek,sugar beet leaves and chickpeas.The main extraction method employed was the chemical extraction using the soxhelet.The study used Uv–vis spectrometer to investigate the micellization behaviour and the consequent adsorption on quartz-sand.The presence of triterpenoid saponin is found dominant in all the sample,the intensity and purity differed according to the raw material source.Tthe critical micelle concentration(CMC)was at a close range of 4–5.5 wt%in all the samples.The highest adsorption was obtained by sugar beet leaves which is 192 g/kg.It is 25%and 37%higher than the Fenugreek and chickpeas,respectively.Increasing the salinity resulted in adsorption reduction between 2%and 56%.For the adsorption isotherms,it showed good agreement with the Langmuir model fitting.The remarkable finding is that the sugar beet leaves heterogeneous model seems to be valid by Frendluich and Halsey isotherms.展开更多
基金Nazarbayev University for supporting this research through the NU Faculty Development Competitive Research Grants Program(Grant numbers:20122022FD4137(AHA)).
文摘Advancing the use of natural surfactants in enhanced oil recovery is crucial for sustainable practices in the oil and gas industry.This research assesses the applicability of neem-derived natural surfactants in offshore fields,encompassing surfactant synthesis via saponification,characterization through FT-IR,SEM,and EDS,and measuring surface and interfacial tension across various conditions.Adsorption studies determined the surfactant's adsorption characteristics onto rock,and core flooding tests assessed its efficacy.Surface tension measurements in deionized water(DIW)and brine confirmed the surfactant's surface activity.As the concentration increased from 1 wt%to 6 wt%,the interfacial tension(IFT)significantly decreased from 22.5 mN/m to 7.9 mN/m,marking a 64.8%reduction.Additionally,surfactants formed micelles more efficiently in saline water,with the critical micelle concentration(CMC)dropping from 4.0 wt%in DIW to 0.9 wt%.Adsorption on limestone showed over 50%higher adsorption than sandstone,confirming stronger interactions and higher adsorption saturation.Core flooding experiments demonstrated the surfactant's effectiveness in oil and water-wet conditions.When injected into sandstone,the surfactant achieved a significant additional oil recovery of 24.6%in deionized water,compared to 10.2%in limestone.Conversely,in saline conditions,the surfactant's performance was better in limestone,achieving an additional recovery of 4.9%,whereas in sandstone,it was only 1.6%.This research offers a unique perspective on how natural surfactants perform across different rock types.The findings suggest that neem-derived surfactants hold significant promise for enhancing oil recovery in Kazakhstan's oil fields.
文摘In chemical enhanced oil recovery(CEOR),it is very important to utilize the excessive usage of chemicals.A great opportunity lies in adopting natural surfactants,since it is cheaper,ecosystem friendly,and less toxic than their counterpart synthetic surfactants.Despite the availability of natural surfactant sources,it is yet very early to decide on their applicability.Therefore,this research focuses on natural-saponin extracted from different raw materials available in the Middle East and their interaction with quartz-sand.A special focus was given to the adsorption isotherm models to describe the interaction with the reservoir rocks.Three raw materials were investigated are fenugreek,sugar beet leaves and chickpeas.The main extraction method employed was the chemical extraction using the soxhelet.The study used Uv–vis spectrometer to investigate the micellization behaviour and the consequent adsorption on quartz-sand.The presence of triterpenoid saponin is found dominant in all the sample,the intensity and purity differed according to the raw material source.Tthe critical micelle concentration(CMC)was at a close range of 4–5.5 wt%in all the samples.The highest adsorption was obtained by sugar beet leaves which is 192 g/kg.It is 25%and 37%higher than the Fenugreek and chickpeas,respectively.Increasing the salinity resulted in adsorption reduction between 2%and 56%.For the adsorption isotherms,it showed good agreement with the Langmuir model fitting.The remarkable finding is that the sugar beet leaves heterogeneous model seems to be valid by Frendluich and Halsey isotherms.
