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Taheri-Shakib J, Naderi H, Salimidelshad Y, et al. Application of ultrasonic as a novel technology for removal of inorganic scales (KCl) in hydrocarbon reservoirs: An experimental approach. Ultrason Sonochem. 2017;40:249-259doi: 10.1016/j.ultsonch.2017.06.019.
Taheri-Shakib, J., Naderi, H., Salimidelshad, Y., Kazemzadeh, E., & Shekarifard, A. (2018). Application of ultrasonic as a novel technology for removal of inorganic scales (KCl) in hydrocarbon reservoirs: An experimental approach. Ultrasonics sonochemistry, 40249-259. https://doi.org/10.1016/j.ultsonch.2017.06.019
Taheri-Shakib, Jaber, et al. "Application of ultrasonic as a novel technology for removal of inorganic scales (KCl) in hydrocarbon reservoirs: An experimental approach." Ultrasonics sonochemistry vol. 40 (2018): 249-259. doi: https://doi.org/10.1016/j.ultsonch.2017.06.019
Taheri-Shakib J, Naderi H, Salimidelshad Y, Kazemzadeh E, Shekarifard A. Application of ultrasonic as a novel technology for removal of inorganic scales (KCl) in hydrocarbon reservoirs: An experimental approach. Ultrason Sonochem. 2018 Jan;40:249-259. doi: 10.1016/j.ultsonch.2017.06.019. Epub 2017 Jul 05. PMID: 28946422.
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Ultrason Sonochem. 2018 Jan;40:249-259. doi: 10.1016/j.ultsonch.2017.06.019. Epub 2017 Jul 05.

Application of ultrasonic as a novel technology for removal of inorganic scales (KCl) in hydrocarbon reservoirs: An experimental approach.

Ultrasonics sonochemistry

Jaber Taheri-Shakib, Hassan Naderi, Yaser Salimidelshad, Ezzatollah Kazemzadeh, Ali Shekarifard

Affiliations

  1. School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran; Institute of Petroleum Engineering, College of Engineering, University of Tehran, Tehran, Iran.
  2. Research Institute of Petroleum Industry, Department of Research and Technology of the Rock and Fluid Reservoirs, Tehran, Iran. Electronic address: [email protected].
  3. Research Institute of Petroleum Industry, Department of Research and Technology of the Rock and Fluid Reservoirs, Tehran, Iran.
  4. Division of Petroleum Engineering, Faculty of Upstream Petroleum Industry, Research Institute of Petroleum Industry (RIPI), Tehran, Iran.

PMID: 28946422 DOI: 10.1016/j.ultsonch.2017.06.019

Abstract

Inorganic scales are one of the most important causes of formation damage, which causes pressure drops near wellbores; these in turn impair permeability and severely reduce production in oil and gas reservoirs. This paper examines the effectiveness of ultrasonic waves in removing potassium chloride (KCl) scales. Twenty core samples with different permeabilities were exposed to KCl precipitation. After measuring the permeabilities of the saturated core samples, the samples were first subjected to water injection, and then to water injection with ultrasonic wave radiation. At each stage, sample permeabilities were measured and recorded. The results showed that water injection with two pore volumes did not significantly improve permeability, especially in low-permeability core samples. Ultrasonic wave radiation with water could efficiently improve permeability; this result is more obvious for samples with lower permeabilities. SEM images taken from thin sections of the core samples under water injection and water with ultrasonic waves showed that ultrasonic waves distorted the crystal lattice of the KCl scales, causing cracking and delamination. Creation of wormholes in KCl deposits within fractures also resulted from the application of ultrasonic waves. Analysis of chlorine in the output water from core samples in the core-flooding process showed that ultrasonic waves increased the solubility of scales in water, improving the recovery of permeability in the samples. Results of this study show that using ultrasonic waves can be considered a novel and practical method in the removal of inorganic scales in the near-wellbore region of oil and gas reservoirs.

Copyright © 2017 Elsevier B.V. All rights reserved.

Keywords: Core; KCl; Permeability; Scales; Ultrasonic; Wormholes

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