Optimization of surfactant-polymer formulations for improving oil production

Hou, Jian; Han, Ming; AlSofi, Abdulkareem M.

doi:10.1080/10916466.2022.2125529

Cited by 3 publications

(1 citation statement)

References 42 publications

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“…Surfactant-mediated chemical injection is regarded as an effective technique to produce additional oil from developed reservoirs. − This technology relies on surfactants to lower the interfacial tension (IFT) between the oil and the injected chemical solutions and emulsify oil to mobilize oil droplets. − Depending on the selected chemical injection strategy and reservoir conditions, the injected surfactants might encounter very challenging conditions in terms of high temperature and high salinity in the reservoir and remain for a few months to several years. These factors could induce the decomposition of surfactants, leading to the increase of IFT or a low efficiency to emulsify oil.…”

Section: Introductionmentioning

confidence: 99%

Long-Term Thermal Stability of Ionic Surfactants for Improving Oil Production at High-Salinity High-Temperature Conditions

Hou,

Huang,

Alotaibi

et al. 2024

ACS Omega

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Surfactants with stable chemical structures and robust ability are required to lower interfacial tension and stabilize emulsions for successful chemical injection applications. This work selected six surfactants, dodecyl carboxylic sodium (LAS), dodecyl sulfonate dodecyl sodium (SLS), dodecyl sulfate sodium (SDS), dodecyltrimethylammonium bromide (DTAB), 3-(N,N-dimethylmyristylammonio) propanesulfonate (SB3−14) and a sulfobetaine formulation (PCT-10), and systematically investigated the ionictype effects on thermal stability at 95 °C for 150 days in highsalinity water (total dissolved solids (TDS) = 57,600 ppm). With characterizations of aged samples performed through a spinning drop tensiometer, high-performance liquid chromatography, and infrared spectroscopy, it can be seen that the long-term stability sequence of ionic surfactants in solutions is sulfobetaine ≈ quaternary ammonium > sulfonate > sulfate > carboxylate. The carboxylate possibly precipitates out from the solution in the acid form, and the sulfonate and sulfate decompositions are due to the hydrolysis of the anionic head, forming alcohol and NaHSO 3 /NaHSO 4 . Obvious decomposition of sulfobetaine and quaternary ammonium was not observed, but these molecules might suffer the elimination of the ionic head, forming the corresponding alkene and amine. The results also show that the dissolved oxygen in the solution preparation significantly sped up the degradation of sulfonates. At last, the emulsion stability tests of crude oil in surfactant solutions showed that sulfobetaine surfactants retained the highest emulsifying ability after thermal aging and thus are promising candidates for long-term chemical injection in hightemperature high-salinity reservoirs.

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Section: Introductionmentioning

confidence: 99%

Long-Term Thermal Stability of Ionic Surfactants for Improving Oil Production at High-Salinity High-Temperature Conditions

Hou,

Huang,

Alotaibi

et al. 2024

ACS Omega

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Optimizing the Carbon Footprint of Polymer Injection Utilizing a Deep Learning Log Interpretation Framework

Katterbauer,

Al Shehri,

Hassan

et al. 2023

SPE/IATMI Asia Pacific Oil &Amp; Gas Conference and Exhibition

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The world of energy industries is exhibiting tremendous efforts to ensure the sustainability of its operations and reduce its carbon footprint. These efforts include optimizing field operations to be more sustainable while maintaining production levels. The 4th Industrial Revolution is having enormous impact on the oil and gas industry, also allowing better analysis of carbon footprint reduction opportunities. Modern logging technologies are able to accurately characterize the formation and measure its production behavior. Polymer injection technologies have the potential to significantly reduce water cut, thereby helping to optimize the carbon footprint. We evaluated the impact of various polymer injection strategies on the Volve field with several production and injection wells to simulate the impact of injecting polymers on the fluid production rates. The injection of polymers helps in reducing the water production rates from the reservoir, thereby reducing the carbon footprint related to the handling of the produced water and injection of water. Various scenarios were evaluated in order to determine the overall impact on carbon emissions and based on a probability-likelihood framework the overall carbon footprint was determined. While the optimal injection strategy may depend on various factors, polymers demonstrate the ability to reduce significantly the overall carbon footprint while increasing hydrocarbon production.

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Synergistic Effect of Ionic Liquid and Surfactant for Enhancing Imbibition in Carbonate Reservoirs

Qi,

Huang,

Alotaibi

et al. 2024

Day 1 Tue, May 07, 2024

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Chemical imbibition technology is an effective way to enhance oil production for fractured carbonate reservoirs. Surfactants have been reported frequently in the literature to enhance imbibition process, while the combination of ionic liquid and surfactants is less investigated. This study aims to analyze the synergic mechanisms of the combination contributing to imbibition process to assist in the application of chemical imbibition technology. The laboratory experiments consisted measurement of several parameters: contact angle, interfacial tension (IFT), and zeta potential. Effectiveness of chemicals were evaluated by spontaneous imbibition using Amott cells. Three functional surfactants and four ionic liquids were investigated. Carbonate core plugs and chips were aged in crude oil at 95°C for more than 3 weeks to render them oil-wet prior to spontaneous imbibition and contact angle tests, respectively. Effect of ionic liquids on wettability alteration, IFT change and ultimate imbibition potential were analyzed. The three surfactants and four ionic liquids were used with different IFT and wettability alteration ability. The ionic liquids have limited effects on IFT change and zeta potential on carbonate rock surface for all the tested surfactants, while the ionic liquid EMIM Ac and one anionic surfactant can modify the oil-wet carbonate surface to water-wet effectively, with contact angle reduced from ∼140° to ∼56°. The ionic liquid can enhance the stability of oil-water interface film, thus keeping the water-wetness status longer, compared with surfactant alone. Using the combination of ionic liquid and surfactant, the imbibition production can be improved by at 6 % compared with surfactant imbibition. The more water-wetness caused by ionic liquid contributes to the incremental oil production. An optimized imbibition agent formulation with high imbibition production potential and relatively lower chemical cost was developed for up-scale consideration. This study investigated the synergistic effect of ionic liquid and surfactant on different parameters, especially the wettability alteration, which helps better understand the complex chemical imbibition phenomenon. The optimized imbibition agent has potential for further investigation.

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Optimization of surfactant-polymer formulations for improving oil production

Cited by 3 publications

References 42 publications

Long-Term Thermal Stability of Ionic Surfactants for Improving Oil Production at High-Salinity High-Temperature Conditions

Long-Term Thermal Stability of Ionic Surfactants for Improving Oil Production at High-Salinity High-Temperature Conditions

Optimizing the Carbon Footprint of Polymer Injection Utilizing a Deep Learning Log Interpretation Framework

Synergistic Effect of Ionic Liquid and Surfactant for Enhancing Imbibition in Carbonate Reservoirs

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