Inhibition of asphaltene flocculation in light crude oil: effect of pressure, temperature and inhibitor concentration

Gharbi, Kheira; Benyounes, Khaled; Benamara, Chahrazed

doi:10.1080/10916466.2018.1496107

Cited by 5 publications

(6 citation statements)

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“…The crude oil was sampled from the wellhead of the selected well, and then it was characterized to define some of its physicochemical properties according to specific standard methods as follows: density at 20 °C (ASTM D4052-11 and ISO12185-96), kinematic viscosity at 20 °C (ASTM D445-06 and ISO 3104-94), total acid number (ASTM D974-04 and ISO 6618-97), sulfur content (ASTM D4294-10 and ISO 8754-03), base sediment and water (ASTM D96 and ISO 9030-90), water content (IP 356), salinity (ASTM D6470), flash point (ASTM D56-05), pour and freezing points (ASTM D97), and metal content (ASTM D6728). Saturated, aromatic, resin, and asphaltene fractions (SARA) were determined using liquid column chromatography according to the protocol illustrated in Figure …”

Section: Experimental Methodsmentioning

confidence: 99%

“…Although the crude oil from this field contains a very low concentration of asphaltenes, they are unstable, which leads to their flocculation and deposition. 5,24…”

Section: T H Imentioning

confidence: 99%

“…The cleaning procedure becomes more complicated when the deposition phenomenon takes place near the wellbore or within the reservoir rock (a form of formation damage). , In some cases, the buildup of asphaltene deposits can completely plug the petroleum flow, especially, where no control is set up. Basically, there are three methods to treat or mitigate the deposition of asphaltenes: mechanical (scrapers), thermal (hot oil, downhole heater, and heat liberate chemicals), and chemical (solvents, dispersants, and inhibitors) . The first two methods are usually applied after the deposition has occurred, while the chemical intervention can be employed before or after the deposition of asphaltenes.…”

Section: Introductionmentioning

confidence: 99%

“…Besides reservoir depletion, the deposition of asphaltenes can also be responsible for the decrease in oil production. Although the crude oil from this field contains a very low concentration of asphaltenes, they are unstable, which leads to their flocculation and deposition. , …”

Section: Introductionmentioning

confidence: 99%

“…Basically, there are three methods to treat or mitigate the deposition of asphaltenes: mechanical (scrapers), thermal (hot oil, downhole heater, and heat liberate chemicals), and chemical (solvents, dispersants, and inhibitors). 5 The first two methods are usually applied after the deposition has occurred, while the chemical intervention can be employed before or after the deposition of asphaltenes.…”

Section: Introductionmentioning

confidence: 99%

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Toward Separation and Characterization of Asphaltene Acid and Base Fractions

et al. 2021

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Chemical inhibition of asphaltene deposition is considered a cost-effective way to prevent the harsh consequences of asphaltene instability in the produced crude. Thus, a careful screening of asphaltene inhibitors is crucial for an efficient prevention. However, the characteristics of asphaltenes such as their acid–base properties will influence the selection of an asphaltene inhibitor and the inhibition mechanism. Therefore, improved knowledge on asphaltene acidic and basic fractions is important. In this work, the separation of asphaltenes into acid, base, neutral, and amphoteric fractions was performed. Among the existing techniques to fractionate asphaltenes, the method of Ramljack was adopted and applied on a light oil extracted asphaltene. However, this oil was sampled from one of the wells in the Hassi Messaoud field in Algeria that experienced a recurring deposition of asphaltenes. The results of asphaltene fractionation reveal that the half composition of this heavy part of crude oil is active functions gathered acid and base components. However, the main contribution is reported to the neutral fraction. The characterization results of infrared and elementary analyses show that both active fractions are aromatic and polar. Moreover, the acid fraction contains in its structure carboxylic acids, phenols, sulfoxide groups, and aliphatic chains, while the structure of the base fraction contains amines, sulfoxide groups, and aliphatic chains.

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Section: Experimental Methodsmentioning

confidence: 99%

“…Although the crude oil from this field contains a very low concentration of asphaltenes, they are unstable, which leads to their flocculation and deposition. 5,24…”

Section: T H Imentioning

confidence: 99%