Petroleum Science >2024,??Issue3:??- DOI: https://doi.org/10.1016/j.petsci.2023.11.023
Acid-rock reaction kinetics in a two-scale model based on reaction order correction Open?Access
文章信息
作者：Xue-Song Li, Ning Qi, Ze-Hui Zhang, Lian Liu, Xia-Qing Li, Xu-Hang Su
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引用方式：Acid-rock reaction kinetics in a two-scale model based on reaction order correction, Petroleum Science, Volume 21, Issue 3, 2024, Pages 2089-2101, https://doi.org/10.1016/j.petsci.2023.11.023.
文章摘要
Abstract: The reaction order plays a crucial role in evaluating the response rate of acid-rock. However, the conventional two-scale model typically assumes that the reaction order is constant as one, which can lead to significant deviations from reality. To address this issue, this study proposes a novel multi-order dynamic model for acid-rock reaction by combining rotating disk experimental data with theoretical derivation. Through numerical simulations, this model allows for the investigation of the impact of acidification conditions on different orders of reaction, thereby providing valuable insights for on-site construction. The analysis reveals that higher response orders require higher optimal acid liquid flow rates, and lower optimal H+ diffusion coefficients, and demonstrate no significant correlation with acid concentration. Consequently, it is recommended to increase the displacement and use high-viscosity acid for reservoirs with high calcite content, while reducing the displacement and using low-viscosity acid for reservoirs with high dolomite content.
關鍵詞
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Keywords: Reaction order; Two-scale model; Wormhole propagation; Carbonate rocks; Numerical simulation