Solving asphaltene precipitation issue in vertical wells via redesigning of production facilities

Hasanvand, Mahdi Zeinali; Ahmadi, Mohammad Ali; Behbahani, Reza Mosayebi

doi:10.1016/j.petlm.2015.07.002

Cited by 20 publications

(7 citation statements)

References 4 publications

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“…(3b) Decreasing the temperature leads to an increase in the onset of asphaltene destabilization pressure above the bubble point pressure. 39 (4b) High-pressure microscopy (HPM) is one of the most suitable methods to study asphaltene precipitation compared to other visual and quantitative methods. 39 This method allows for the simulation of high-pressure, hightemperature conditions, and microscopy techniques are used to visualize the onset of precipitation.…”

Section: Experimental and Field Observationsmentioning

confidence: 99%

“…39 (4b) High-pressure microscopy (HPM) is one of the most suitable methods to study asphaltene precipitation compared to other visual and quantitative methods. 39 This method allows for the simulation of high-pressure, hightemperature conditions, and microscopy techniques are used to visualize the onset of precipitation. (5b) On the basis of Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) analysis, the capillary deposit precipitated a higher molecular weight and a faster deposition than the precipitated particles in the field.…”

Section: Experimental and Field Observationsmentioning

confidence: 99%

“…However, no scientific explanation was provided. (3b) Decreasing the temperature leads to an increase in the onset of asphaltene destabilization pressure above the bubble point pressure . (4b) High-pressure microscopy (HPM) is one of the most suitable methods to study asphaltene precipitation compared to other visual and quantitative methods .…”

Section: Experimental and Field Observationsmentioning

confidence: 99%

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Review of Asphaltene Deposition Modeling in Oil and Gas Production

2020

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Asphaltene precipitation and deposition in the reservoir, near-wellbore region, and pipelines is one of the critical problems in flow assurance. It can cause a blockage of pore throats and reduce the permeability of the rock and the production rate in pipelines. Therefore, a thorough investigation of the structure and characterization of asphaltenes is essential to control this issue. Developing a reliable model to predict the deposition of asphaltenes in the reservoir and pipes is key to further understand this phenomenon. In this paper, the asphaltene structure is discussed in terms of the techniques used to identify the structure, molecular weight, size, and geometry of asphaltene. The thermodynamic characterization of asphaltenes is highly dependable upon the structure and molecular weight of particles; thus, a brief overview of the precipitation of asphaltenes is given. A detailed comparison of the available models in the literature is provided for asphaltene deposition in reservoirs as well as flowlines. Several mechanisms are assumed to develop current models; however, more research on closure relationships and tuning parameters is needed because most of them are not universal and are dependent upon the conditions of the flow. The lack of complete data poses another challenge that hinders the ability to evaluate the accuracy of existing models. Industrial case studies and treatment methods are discussed to understand the application of the theories to practical issues and bridge the gap between theory and field conditions. Discoveries from the field and lab-scale experiments are provided in the paper to assist in addressing the mechanisms of the proposed models and the link between theory and application. Overall, this paper provides a comprehensive review of asphaltene deposition modeling and discusses potential improvements for current models.

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Section: Experimental and Field Observationsmentioning

confidence: 99%

Section: Experimental and Field Observationsmentioning

confidence: 99%

Section: Experimental and Field Observationsmentioning

confidence: 99%

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Review of Asphaltene Deposition Modeling in Oil and Gas Production

2020

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“…Asphaltenes are non-symmetrical molecules with wide ranges of sizes and structures, which make them hard to model. Various methods can be applied to prevent asphaltene precipitation during oil production, e.g., using inhibitors or dispersants [10]. Anionic and non-anionic surfactants can be used as inhibitors or dispersants [11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Molecular Interactions between Asphaltene and Surfactants in a Hydrocarbon Solvent: Application to Asphaltene Dispersion

Ahmadi

Chen

2020

Symmetry

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Heavy oil and bitumen supply the vast majority of energy resources in Canada. Different methods can be implemented to produce oil from such unconventional resources. Surfactants are employed as an additive to water/steam to improve an injected fluid’s effectiveness and enhance oil recovery. One of the main fractions in bitumen is asphaltene, which is a non-symmetrical molecule. Studies of interactions between surfactants, anionic, and non-anionic, and asphaltene have been very limited in the literature. In this paper, we employed molecular dynamics (MD) simulation to theoretically focus on the interactions between surfactant molecules and different types of asphaltene molecules observed in real oil sands. Both non-anionic and anionic surfactants showed promising results in terms of dispersant efficiency; however, their performance depends on the asphaltene architecture. Moreover, a hydrogen/carbon (H/C) ratio of asphaltenes plays an inevitable role in asphaltene aggregation behavior. A higher H/C ratio resulted in decreasing asphaltene aggregation tendency. The results of these studies will give a deep understanding of the interactions between asphaltene and surfactant molecules.

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“…Variations in temperature, pressure, and chemical composition may precipitate asphaltenes, affecting negatively all stages of production (Hasanvand et al, 2015;Goual, 2012). Deposition may result in total or partial blockage of the flow in reservoirs, production columns, and drainage ducts.…”

Section: Introductionmentioning

confidence: 99%

Organic Deposition in Petroleum Storage Tanks at Refineries Due to Blending Operations

Camargo¹,

Ramos

Gatto³

et al. 2019

BJPG

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Petroleum blending is viewed as a critical optimization strategy adopted by several operations of petroleum production in the refineries around the world. A persistent problem called crude oil incompatibility occurs when the mixture of different oils lead to the formation of solid phases due to the precipitation of asphaltenes. The present work investigates the relationship between the occurrence of sludge in petroleum storage tanks and petroleum blending operations. Hildebrand solubility parameters of the oils were determined, revealing that one of the samples of petroleum analyzed is at the threshold of the asphaltene flocculation parameter, with an average of 16.1 Mpa 1/2. Thus, it implies that blending operations with dissimilar petroleum feedstocks must be well planned, since they can initiate the precipitation of the asphaltenes and, consequently, the formation of sludge that accumulate and deposit as sediments inside petroleum storage tanks.

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Solving asphaltene precipitation issue in vertical wells via redesigning of production facilities

Cited by 20 publications

References 4 publications

Review of Asphaltene Deposition Modeling in Oil and Gas Production

Review of Asphaltene Deposition Modeling in Oil and Gas Production

Molecular Interactions between Asphaltene and Surfactants in a Hydrocarbon Solvent: Application to Asphaltene Dispersion

Organic Deposition in Petroleum Storage Tanks at Refineries Due to Blending Operations

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