Experimental investigation on application of industrial coatings for prevention of asphaltene deposition in the well-string

Moradi, Shapour; Amirjahadi, Saeed; Danaee, I.; Soltani, Behzad

doi:10.1016/j.petrol.2019.05.046

Cited by 15 publications

(8 citation statements)

References 71 publications

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“…The methods for removing ARPDs include: thermal (steam injection, flushing with hot oil or water as a coolant, the use of electric furnaces, induction heaters, etc. ), mechanical (the use of scraping tools, scratchalizers mounted on rods), and chemical (the use of organic solvents or detergents to remove ARPDs) [1][2][3][4][5][6][7][8][9].…”

Section: Literature Reviewmentioning

confidence: 99%

“…The deterioration of temperature and pressure conditions, increased water cut (over 80%), weighting of oil, and low oil production rates are typical for this stage. In addition, asphalt-resin-paraffin deposits are formed in the downhole equipment and in the bottomhole formation zone [1][2][3][4][5][6][7][8]. In this article, the bottomhole formation zone means a layer area adjacent to the wellbore where the filtration properties of a pay zone have changed.…”

Section: Introductionmentioning

confidence: 99%

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Improving the Efficiency of Oil and Gas Wells Complicated by the Formation of Asphalt–Resin–Paraffin Deposits

2021

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A number of difficulties may be encountered in the final stages of oil field exploitation, including the formation of asphalt–resin–paraffin deposits (ARPDs). It is expedient to use complex technologies to remove the already formed deposits and prevent the formation of ARPDs. This paper focuses on the complex technology of oil field exploitation. This technology combines both the removal of organic deposits and the prevention of the formation of these deposits in the well bottomhole formation zone (BHFZ) system. The calculations for determining the process parameters of selling the ARPD inhibitor solution into the BHFZ are presented in this article. This complex technology includes the process of ARPD removal by flushing the well and the subsequent injection of the developed ARPD solvent into the BHFZ. In addition, the technology is complemented by a method of preventing the formation of these deposits. This method consists of squeezing the ARPD inhibitor and then pumping it by the selling fluid from five to ten times of the volume. This article contains a detailed calculation of the methodology and provides the diagrams for the solvent and inhibitor injection.

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Section: Literature Reviewmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improving the Efficiency of Oil and Gas Wells Complicated by the Formation of Asphalt–Resin–Paraffin Deposits

2021

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“…EOS was used to determine the Hamaker constant and analyze surface energy and sticking probability. Moradi et al 131 investigated the effectiveness of several coatings in preventing asphaltene deposition. A flow loop experiment was performed to analyze the performance of epoxy resin, polyurethane, phosphate, and two fluoropolymers: polytetrafluoroethylene (PTFE) and perfluoroalkoxy alkane (PFA).…”

Section: Prevention and Controlling Depositionmentioning

confidence: 99%

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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“…The results showed that acid–base (AB) interactions were an important factor in the prevention of asphaltene deposition by decreasing the attractive force between asphaltene and dolomite. Asphaltene deposition on carbon steel can be reduced above 90% by coating the substrate with a superhydrophilic phosphate or a fluoropolymer . A phosphate formed a water film, and a fluoropolymer formed a hydrophobic film which in turn lowered the asphaltene deposition.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Asphaltene Polydispersity, Stability, and Deposition on Steel Using XDLVO Theory

Nguyen¹,

Cao²,

Pohl³

et al. 2023

Energy Fuels

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The characterization and analysis of asphaltene particles are very crucial in the petroleum industry as the precipitation and subsequent deposition of asphaltenes cause formation damage and clogging of wellbore and production equipment, leading to production decline and operational drawbacks. In this study, the polydispersity of asphaltenes and the interaction between asphaltenes were probed by using the surface energy concept. Asphaltenes from three different oil fields in the Gulf of Mexico (GOM) were selected for this study. The results revealed that asphaltenes destabilized by different precipitants in the lab or from different assets in the field have distinctive surface energy values. Dispersive force was the dominant force of asphaltenes in oil systems. However, increasing polar forces appeared to increase the attractive interaction between asphaltenes which can in turn lead to higher aggregation and precipitation tendency. The magnitude of polar force is proportional to the content of heteroatoms and has a higher value for asphaltenes that were destabilized and then deposited by smaller alkanes. The stability of asphaltenes in oil from various fields and their deposition on steel were also investigated using the extended Derjaguin–Landau–Verwey–Overbeek (XDLVO) theory. The results showed that van der Waals and acid–base interactions, among other components of the surface energy, were dominant in promoting asphaltene aggregation and deposition by increasing the attractive force between similar asphaltenes and asphaltene-steel, respectively. These findings were further supported by the concept of works of cohesion and adhesion. The results showed that asphaltenes were unstable and had the tendency to deposit on the steel substrate. The total interaction energy between asphaltene and steel, obtained from the XDLVO theory, and the work of adhesion correlated well with the amounts of asphaltene deposition generated by experimental lab setups. Interfacial tension between asphaltene and steel can provide information about the bond stability and deposit persistence under shear.

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Experimental investigation on application of industrial coatings for prevention of asphaltene deposition in the well-string

Cited by 15 publications

References 71 publications

Improving the Efficiency of Oil and Gas Wells Complicated by the Formation of Asphalt–Resin–Paraffin Deposits

Improving the Efficiency of Oil and Gas Wells Complicated by the Formation of Asphalt–Resin–Paraffin Deposits

Review of Asphaltene Deposition Modeling in Oil and Gas Production

Investigation of Asphaltene Polydispersity, Stability, and Deposition on Steel Using XDLVO Theory

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