Steady-state and time-resolved fluorescence spectroscopic study of petroleum crudes in aqueous-surfactant solutions: Its implications for enhanced oil recovery (EOR) during surfactant flooding

Bhui, Uttam K.; Sanyal, Saheli; Saha, Ranajay; Rakshit, Surajit; Pal, Samir Kumar

doi:10.1016/j.fuel.2018.08.006

Cited by 22 publications

(12 citation statements)

References 35 publications

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“…Chemical ooding can promote oil production through various mechanisms, such as in situ emulsication, mobility ratio control, and reduction of the interfacial tension between the oil and displacement phase. [3][4][5][6] In recent years, the application of nanotechnology has been the focus of EOR research. A variety of organic and inorganic nanomaterials have been reported to improve oil recovery.…”

Section: Introductionmentioning

confidence: 99%

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Design and characterization of oil-in-water nanoemulsion for enhanced oil recovery stabilized by amphiphilic copolymer, nonionic surfactant, and LAPONITE® RD

Zhao

Peng

2021

RSC Adv.

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Section: Introductionmentioning

confidence: 99%

“…Chemical flooding can promote oil production through various mechanisms, such as in situ emulsification, mobility ratio control, and reduction of the interfacial tension between the oil and displacement phase. 3–6 …”

Section: Introductionmentioning

confidence: 99%

Design and characterization of oil-in-water nanoemulsion for enhanced oil recovery stabilized by amphiphilic copolymer, nonionic surfactant, and LAPONITE® RD

Zhao

Peng

2021

RSC Adv.

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“…The surfactant decreases the water–oil interfacial tension (IFT), thereby increasing the capillary number and enhancing displacement efficiency. Moreover, modification of the reservoir surface wettability and emulsification of the crude oil are important mechanisms for surfactant flooding. − The alkali component acts as an electrolyte; together with the surfactant, it plays an important role in reducing the water–oil IFT . The alkali can also combine with divalent ions on the surfaces of rock and clay minerals, thereby inhibiting adsorption loss of anionic surfactants. , …”

Section: Introductionmentioning

confidence: 99%

Temperature-Responsive Hydrogel Carrier for Reducing Adsorption Loss of Petroleum Sulfonates

2021

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As an effective anionic surfactant for chemical flooding, petroleum sulfonate (PS) is often used in conjunction with alkalis to reduce the adsorption loss of PS onto rock and clay surfaces. However, alkali injection can lead to scaling, aggravate the water-sensitive effect of clays, and accelerate polymer hydrolysis. Here, a temperature-responsive biohydrogel-based carrier (XLK) was designed to protect PS from adsorption onto geological features. XLK, an aqueous mixture containing 0.5% xanthan gum, 0.5% locust bean gum, and 2% KCl, was a gel at room temperature and transformed gradually into a sol above 50 °C (sol/gel transition temperature, T sol/gel ). Below the T sol/gel , most PS was retained in the gel, preventing the adsorption of PS onto quartz sand. Above the T sol/gel , PS was released into the surrounding medium. After it had been loaded with PS, the storage modulus (G′, Pa) of XLK increased from 10 2 to 10 3 and the loss modulus (G″, Pa) increased from 10 1 to 10 2 . Environmental scanning electron microscopy micrographs showed that PS filled gaps within the cross-linked network structure of XLK. Compared with the aqueous XLK formulation, the addition of hydrolyzed polyacrylamide (HPAM) decreased the melt rate of XLK and the interfacial tension (IFT) of PS. Among the constituents of XLK loaded with PS, KCl had the most obvious effect of lowering the shear modulus of HPAM. Sufficient amounts of KCl were effective in reducing the IFT of PS to ultralow levels (10 −3 mN/m).

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“…3 However, the method benefits from preliminary chromatographic separation of the sample analogous to the SARA 4,5 procedure, namely, to remove nonpolar fractions, that are better analyzed using, for example, gas chromatography (GC). 6 The present study is composed of two parts. In the first part, tight chalk drill core samples from Dan, Halfdan, and Kraka fields are studied.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic Fingerprinting of Organic Material Extracted from Tight Chalk Core Samples of the North Sea

Mihrin

Sanchez

et al. 2020

ACS Omega

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The detailed chemical composition of crude oil in subsurface reservoirs provides important information about reservoir connectivity and can potentially play a very important role for the understanding of recovery processes. Relying on studying produced oil samples alone to understand the rock-fluid and fluid–fluid interactions is insufficient as the heavier polar components may be retained by tight reservoirs and not produced. These heavy and polar compounds that constitute the resin and asphaltene fractions of crude oil are typically present in low concentrations and yet are determining for the physical–chemical properties of the oil because of their polarity. In order to obtain a fingerprint analysis of oils including polar compounds from different wells, the oil content of drill cores has been extracted and analyzed. Infrared spectroscopy has been used to perform chemical fingerprinting of the oil extracted from drill cores sampled in different geographical locations of the Danish North Sea. Statistical analysis has been employed to identify the chemical differences within the sample set and explore the link between chemical composition and geographic location of the sample. A principal component analysis, based on spectral peak fitting in the 1800–1400 cm–1 range, has allowed for statistical grouping of the samples and identified the primary chemical feature characteristic of these groups. Statistically significant differences in the quantities of polar oxygen- and nitrogen-containing compounds were found between the oil wells. The results of this analysis have been used as guidelines and reference to establish an express statistical approach based on the full-range infrared spectra for a further expansion of the sample set. The chemical information presented in this work is discussed in relation to oil fingerprinting and geochemical analysis.

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Steady-state and time-resolved fluorescence spectroscopic study of petroleum crudes in aqueous-surfactant solutions: Its implications for enhanced oil recovery (EOR) during surfactant flooding

Cited by 22 publications

References 35 publications

Design and characterization of oil-in-water nanoemulsion for enhanced oil recovery stabilized by amphiphilic copolymer, nonionic surfactant, and LAPONITE® RD

Design and characterization of oil-in-water nanoemulsion for enhanced oil recovery stabilized by amphiphilic copolymer, nonionic surfactant, and LAPONITE® RD

Temperature-Responsive Hydrogel Carrier for Reducing Adsorption Loss of Petroleum Sulfonates

Spectroscopic Fingerprinting of Organic Material Extracted from Tight Chalk Core Samples of the North Sea

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