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<p>Scale deposition in oil/gas/water wells is a critical factor affecting well stability, making targeted selection of descaling agents and their field application parameters crucial for enhancing and sustaining production. Currently, the petroleum industry commonly employs traditional gravimetry to evaluate dissolution rates—an intermittent testing method with discontinuous data acquisition, susceptible to human interference, and incapable of real-time monitoring. This results in insufficient data for dissolution process analysis, leading to significant testing errors and low efficiency. To address these limitations, this study considers the universal phenomenon of real-time volume reduction and buoyancy loss during solid dissolution. By introducing parameters such as “buoyancy-equivalent mass” and “tension-equivalent mass”, a real-time dissolution rate calculation method was established based on dynamic force variations. Furthermore, a real-time scale dissolution rate testing procedure was designed and refined, and a testing platform was constructed. To demonstrate the superiority of the new method, comparative experiments were conducted between this method and the traditional gravimetric method for scale dissolution rate testing, comparing their testing precision and efficiency. The comparative experimental results are as follows: (1) <i>The new method exhibits superior testing precision</i>: Compared to the traditional gravimetric method, its standard deviation and relative standard deviation decreased by 11.3% (3.07% vs. 3.46%) and 25.9% (5.31% vs. 7.17%), respectively; (2) <i>The new method demonstrates higher testing efficiency</i>: Compared to the traditional gravimetric method, it offers better time efficiency (shorter testing duration: 7.3&#xa0;h vs. 8.5&#xa0;h), superior resource efficiency (fewer equipment usage instances: 7 times vs. 15 times), and better output efficiency (larger volume of data collected: sampling frequency 1&#xa0;Hz vs. 1 h<sup>−1</sup>, a 3600-fold difference). This study proposes a novel real-time scale dissolution rate testing method that addresses the issue of discontinuous data acquisition. The method exhibits enhanced precision and efficiency. It holds great potential for studying the dissolution kinetics of salt scales and significant application value in the precise treatment of long-standing scale issues in oil and gas transportation pipelines.</p>

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Real-Time Analysis of Salt Scale Dissolution: Enhancing the Traditional Gravimetric Method and Comparing Precision and Efficiency

  • 期刊论文

  • 发表日期：

    2025年10月11日

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  • Rui Huang,
  • Renbao Zhao,
  • Yuting Yuan,
  • Yuanpeng Pu,
  • Jiapeng Zhang,
  • Shixun Bai,
  • Jingjie Huang

摘要

Scale deposition in oil/gas/water wells is a critical factor affecting well stability, making targeted selection of descaling agents and their field application parameters crucial for enhancing and sustaining production. Currently, the petroleum industry commonly employs traditional gravimetry to evaluate dissolution rates—an intermittent testing method with discontinuous data acquisition, susceptible to human interference, and incapable of real-time monitoring. This results in insufficient data for dissolution process analysis, leading to significant testing errors and low efficiency. To address these limitations, this study considers the universal phenomenon of real-time volume reduction and buoyancy loss during solid dissolution. By introducing parameters such as “buoyancy-equivalent mass” and “tension-equivalent mass”, a real-time dissolution rate calculation method was established based on dynamic force variations. Furthermore, a real-time scale dissolution rate testing procedure was designed and refined, and a testing platform was constructed. To demonstrate the superiority of the new method, comparative experiments were conducted between this method and the traditional gravimetric method for scale dissolution rate testing, comparing their testing precision and efficiency. The comparative experimental results are as follows: (1) The new method exhibits superior testing precision: Compared to the traditional gravimetric method, its standard deviation and relative standard deviation decreased by 11.3% (3.07% vs. 3.46%) and 25.9% (5.31% vs. 7.17%), respectively; (2) The new method demonstrates higher testing efficiency: Compared to the traditional gravimetric method, it offers better time efficiency (shorter testing duration: 7.3 h vs. 8.5 h), superior resource efficiency (fewer equipment usage instances: 7 times vs. 15 times), and better output efficiency (larger volume of data collected: sampling frequency 1 Hz vs. 1 h−1, a 3600-fold difference). This study proposes a novel real-time scale dissolution rate testing method that addresses the issue of discontinuous data acquisition. The method exhibits enhanced precision and efficiency. It holds great potential for studying the dissolution kinetics of salt scales and significant application value in the precise treatment of long-standing scale issues in oil and gas transportation pipelines.