Mitigation of Asphaltene Deposition by Re-injection of Dead Oil

Khaleel, Aisha; Abutaqiya, Mohammed I. L.; Sisco, Caleb J.; Vargas, Francisco M.

doi:10.1016/j.fluid.2020.112552

Cited by 9 publications

(6 citation statements)

References 17 publications

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“…The authors deal with a topical issue of conducting thermal treatment throughout the SRP's hollow rods without shutting a well-operating down. Currently, the theoretical material and field experience of wells backwash with coolant supply into the annular space (Ramey, 2013) have been accumulated, but systematic ideas concerning the effectiveness of flushing throughout hollow rods have not been represented (Garcia, 2001;Soulgani, 2010;Khaleel, 2020;Kovalev, 2018;Yemelyanov et al, 2019).…”

Section: Methodsmentioning

confidence: 99%

“…Within the territory of the Perm region, the main problem arising during the operation of wells is asphaltene-resin-paraffin deposits (ARPD), establishing onto the surface of deep-pumping equipment (Figure 1) (Khizhnyak, 2014). Wherein, there are premature failures of pumping equipment and well shutdowns, accompanied by shortages in oil production (Eskin, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Efficiency Evaluation of the Heat Deparafinization of Producing Well Equipped by Sub Pump With Hollow Rods

Лекомцев¹,

Kang²,

Galkin³

et al. 2020

PTQ

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One of the main oil production complications is that asphaltene-resin-paraffin deposits (ARPD) are formed during production wells' operation. This is an urgent problem in the oil and gas industry, especially in the fields of the Ural-Volga region (Russia). This study aimed to develop a technological solution for the effective thermal treatment of deposits based on the wells' thermal state calculation during a sucker rod pump operation. In practice, the thermal effect on ARPD is carried out by flushing-out with a hot agent (water, oil). Traditionally, flushes are carried out through the casing annulus. However, this method is ineffective due to large heat losses and the impossibility of heating the inner part of the tubing in a sufficient way, where ARPD is deposited. Dynamic modeling of the process was performed in the ANSYS Fluent software product. The heat problem was solved on the basis of the Navier-Stokes Reynolds-averaged heat and mass transfer equation. It was noted that the temperature of the injected agent (hot oil or water) affects the temperature of the tubing's inner wall to a lesser extent than the coolant flow rate. It has been established that it is impossible to reach the melting point of wax at the submersible pump level. The flow rate of the coolant affects this parameter more intensively. When flushing with hot oil 120°C with a flow rate of 300 m3 /day, the temperature above the pump will be equal to the wax melting temperature. Calculations indicate that it is most advisable to use oil heated to 120°C as a coolant for flushing wells than water with a 90°C temperature. The implementation of the methods proposed can be used on any well equipped with a sucker rod pump.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Efficiency Evaluation of the Heat Deparafinization of Producing Well Equipped by Sub Pump With Hollow Rods

Лекомцев¹,

Kang²,

Galkin³

et al. 2020

PTQ

View full text Add to dashboard Cite

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“…Masoudi et al [105] showed that models that are fitted to the HPHT onsets cannot accurately match the experimental wt% of asphaltene precipitated. Khaleel et al [137,214] concluded that those models that assume asphaltene monodispersity tend to highly overestimate the amount of precipitated asphaltenes. In general, they calculate a slightly lower U-AOP values compared to modeling polydisperse asphaltene media.…”

Section: The Effect Of Asphaltene Polydispersitymentioning

confidence: 99%

Characterization of crude oils and asphaltenes using the PC-SAFT EoS: A systematic review

Seitmaganbetov

Rezaei

Shafiei

2021

Fuel

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“…They suggested the use of a low dose of a 50:50 mixture of toluene/diesel. Khaleel et al 118 proposed a novel idea to mitigate asphaltene deposition by simply reinjecting dead oil obtained at the surface. The idea stems from the fact that asphaltene precipitation is stabilized by the addition of dead oil, contrary to the effect of injecting gas that destabilizes the oil and leads to precipitation.…”

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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Mitigation of Asphaltene Deposition by Re-injection of Dead Oil

Cited by 9 publications

References 17 publications

Efficiency Evaluation of the Heat Deparafinization of Producing Well Equipped by Sub Pump With Hollow Rods

Efficiency Evaluation of the Heat Deparafinization of Producing Well Equipped by Sub Pump With Hollow Rods

Characterization of crude oils and asphaltenes using the PC-SAFT EoS: A systematic review

Review of Asphaltene Deposition Modeling in Oil and Gas Production

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