Chemical study of asphaltene inhibitors effects on asphaltene precipitation of an Iranian oil field

Ahmadbaygi, Afshar; Bayati, Behrouz; Mansouri, Mohsen; Rezaei, Hossein; Riazi, Masoud

doi:10.2516/ogst/2019063

Cited by 17 publications

(10 citation statements)

References 44 publications

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“…The wax is mostly composed of alkane with the dominant normal paraffin content and a small amount of isoparaffin and naphthenes. Asphaltene is a complex mixture composed of macromolecular hydrocarbons and their non-metallic derivatives, containing some O, S, N, Cl, and a few metallic ionic elements [55]. Thereby, it could be confirmed that the precipitation contained asphaltene as long as O, S, N, Cl, or metallic elements were determined by energy spectrum analysis.…”

Section: Demonstration Of Precipitation Componentmentioning

confidence: 97%

Experimental investigation on precipitation damage during water alternating flue gas injection

Wang

Zhang

Liao

2020

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Water Alternating Gas (WAG) approach can improve the efficiency of gas flooding. However, the precipitation damage that is induced by the gas injection may be inevitable. The precipitation pressure point test of gas injection, and the WAG parallel double-tube long-core flooding experiment under different injection conditions were systematically performed to obtain the optimum injection parameters. The variations of petrophysical properties were caused by precipitation, and its morphology was also determined by centrifugal capillary force and environmental scanning electron microscope. The precipitation pressure rised with the increase of the amount of gas injection, generally 2.0 MPa ~ 3.0 MPa higher than the bubble point pressure (Pb), and it was confirmed by X-ray energy spectrum and scanning electron microscope that the precipitation was mainly asphaltene. The optimum injection parameters for WAG were Gas–Water Ratio (GWR) of 1:1 and slug size of 0.1 HydroCarbon Pore Volume (HCPV), which benefited the recovery of low-permeability and high-permeability pipe by additional recovery of 28.5% and 17.4% respectively, while WAG process enhanced the total oil recovery by 23.4%. The pore volume and median radius of capillary pressure of all cores were both reduced with more obvious effects on conglomerate. Combined with the results of sediment saturation, it also showed the poorer the physical properties of the cores, the severer the influence of the precipitation. Overall, the WAG could greatly improve the recovery but the influence of precipitation must be considered.

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Section: Demonstration Of Precipitation Componentmentioning

confidence: 97%

Experimental investigation on precipitation damage during water alternating flue gas injection

Wang

Zhang

Liao

2020

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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“…The filter paper is then placed in Soxhlet extractor apparatus and heat up using n-alkanes to remove impurities. Lastly, the filter paper is weigh to determine asphaltene contents (Karambeigi et al 2016;Enayat et al 2020;Ahmadbaygi et al 2020). The general schematic of this experiment is presented in Fig.…”

Section: Introductionmentioning

confidence: 99%

Ranking of health and safety risks in a crude oil asphaltene quantification experiment using multiple integrated multi-criteria decision making methods

Ali

Lalji

Haneef

et al. 2022

Preprint

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Academic Laboratories plays a significant role during students and researchers academic life. In academic labs, students routinely performed different experiments and most often they are not aware of the experimental hazards and hence encounter accidents. Moreover, these research Labs possess complex nature because of their variety of operations, equipment and experiments, therefore, analyzing risks through conventional techniques become extremely difficult. In this research study, risks prioritization of an experiment related to asphaltene quantification in a crude oil has been carried out through four methods. Firstly, the conventional risk analysis technique Failure mode and effect analysis (FMEA) is applied. For the implementation of FMEA, 44 failure scenarios/modes that could occur and can impact health and safety of researcher or students are identified. Each failure mode is assessed in terms of severity, likelihood of occurrence and detection. FMEA, similar to other studies in literature, is not able to work effectively in prioritizing the risks. Therefore, in order to overcome this limitation of FMEA, FMEA integrated with Grey Relational Analysis and Fuzzy Analytic hierarchy process method is applied and improvement in risk ranking is observed. Finally for further analysis of risks, Fuzzy technique for order preference by similarity to ideal solution (TOPSIS) integrated with a Fuzzy AHP is implemented and considerable improvement in risk ranking is achieved. The proposed study will help researchers to take complete precautionary measures according to the risks involved in an experiment. Moreover, this proposed model can be used and applied for other experiments performed in Academic Labs.

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“…The nonunique properties of asphaltenes make them more complex components, and thus, the choice of a treatment to deal with asphaltene deposition becomes very difficult. Therefore, having knowledge about asphaltene characteristics can be a helpful guide in the selection of asphaltene inhibitors . For example, negatively charged asphaltenes tend to be dispersed by cationic amphiphiles, while positively charged asphaltenes tend to be dispersed by anionic amphiphiles .…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, having knowledge about asphaltene characteristics can be a helpful guide in the selection of asphaltene inhibitors. 16 For example, negatively charged asphaltenes tend to be dispersed by cationic amphiphiles, while positively charged asphaltenes tend to be dispersed by anionic amphiphiles. 17 Moreover, it was demonstrated by Madhi et al 18 that the acid−base interaction is the stronger contributor to the inhibition mechanism than hydrogen bonding and π−π interactions.…”

Section: Introductionmentioning

confidence: 99%

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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Chemical study of asphaltene inhibitors effects on asphaltene precipitation of an Iranian oil field

Cited by 17 publications

References 44 publications

Experimental investigation on precipitation damage during water alternating flue gas injection

Experimental investigation on precipitation damage during water alternating flue gas injection

Ranking of health and safety risks in a crude oil asphaltene quantification experiment using multiple integrated multi-criteria decision making methods

Toward Separation and Characterization of Asphaltene Acid and Base Fractions

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