Interface dissolution kinetics and porosity formation of calcite and dolomite (110) and (104) planes: An implication to the stability of geologic carbon sequestration

Guangyou Zhu; Zhenlun Wei; Wanqing Li; Xu Yang; Shuqin Cao; Xiaoyong Wu; Yubiao Li

doi:10.1016/j.jcis.2023.07.035

Interface dissolution kinetics and porosity formation of calcite and dolomite (110) and (104) planes: An implication to the stability of geologic carbon sequestration

J Colloid Interface Sci. 2023 Nov 15;650(Pt B):1003-1012. doi: 10.1016/j.jcis.2023.07.035. Epub 2023 Jul 7.

Authors

Guangyou Zhu¹, Zhenlun Wei², Wanqing Li³, Xu Yang³, Shuqin Cao³, Xiaoyong Wu⁴, Yubiao Li⁵

Affiliations

¹ Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China.
² School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, Hubei, China. Electronic address: erebus@whut.edu.cn.
³ School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, Hubei, China.
⁴ School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, Hubei, China; Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Wuhan 430070, Hubei, China.
⁵ School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, Hubei, China; Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Wuhan 430070, Hubei, China. Electronic address: yubiao.li@whut.edu.cn.

PMID: 37459724
DOI: 10.1016/j.jcis.2023.07.035

Abstract

Geologic carbon sequestration (GCS) via injecting CO₂ into deep carbonate reservoirs (mainly calcite and dolomite) is a promising strategy to reduce CO₂ level. However, the dissolution or precipitation of calcite/dolomite planes on minerals/solution interface during long-term GCS process develops intergranular porosity and thus affects the permeability and stability of reservoirs. To investigate this process, both calcite and dolomite were dissolved in acetic and carbonic acids. A diffusion-controlled process was identified, with greater diffusion rates in acetic acid than that in carbonic acid. Quantified planes activity of both minerals follows (110) > (116) > (101) > (113) > (018) > (104) through density functional theory. Accomplished with preferential dissolution of calcite (110) planes in carbonic acid, calcite crystals precipitated with (104) planes at 423.15 K, under which, more calcite crystals were observed on dolomite surface, producing Ca-deplete surface. Molecular dynamic calculations showed higher dissolution rates of calcite/dolomite (110) planes than (104). In addition, the dissolution coefficients of Ca²⁺ were approximately triple of that Mg²⁺. Therefore, this study reveals the interface dissolution mechanisms of calcite and dolomite, especially on (110) and (104) planes at an atomic level, for the first time, providing better understanding for the stability of long-term GCS process.

Keywords: Carbonate reservoirs; Crystal plane; Density functional theory; Interface dissolution.