Real Time 3D Observations of Portland Cement Carbonation at CO2 Storage Conditions.,Environmental Science & Technology

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Real Time 3D Observations of Portland Cement Carbonation at CO2 Storage Conditions.
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2020-06-11 , DOI: 10.1021/acs.est.0c00578
Elvia A Chavez Panduro _{1,

2} , Benoît Cordonnier _{3,

4} , Kamila Gawel ₅ , Ingrid Børve ₁ , Jaisree Iyer ₆ , Susan A Carroll ₆ , Leander Michels ₁ , Melania Rogowska ₇ , Jessica Ann McBeck ₃ , Henning Osholm Sørensen _{7,

8} , Stuart D C Walsh ₉ , François Renard _{3,

10} , Alain Gibaud ₁₁ , Malin Torsæter ₅ , Dag W Breiby _{12,

13}

Affiliation

Department of Physics, Norwegian University of Science and Technology (NTNU), Høgskoleringen 5, 7491 Trondheim, Norway.
SINTEF Energy Research, Postboks 4761 Torgarden, 7465, Trondheim, Norway.
The Njord Centre, Department of Geosciences, University of Oslo, Oslo, 0315, Norway.
ESRF, European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000 Grenoble, France.
SINTEF Industry, S. P. Andersens veg 15B, 7031 Trondheim, Norway.
Atmospheric Earth and Energy Division, Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, United States.
Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen Ø, Denmark.
Department of Physics, Technical University of Denmark, Fysikvej, 2800 Kongens Lyngby, Denmark.
Resources Engineering, Monash University, Melbourne, VIC 3800, Australia.
University Grenoble Alpes, University Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, 38000, Grenoble, France.
LUNAM, IMMM, UMR 6283 CNRS, Le Mans Université, 72085 Le Mans Cedex 09, France.
PoreLab, Department of Physics, Norwegian University of Science and Technology (NTNU), Høgskoleringen 5, 7491 Trondheim, Norway.
Department of Microsystems, University of South-Eastern Norway, Campus Bakkenteigen, 3184 Borre, Norway.

Depleted oil reservoirs are considered a viable solution to the global challenge of CO₂ storage. A key concern is whether the wells can be suitably sealed with cement to hinder the escape of CO₂. Under reservoir conditions, CO₂ is in its supercritical state, and the high pressures and temperatures involved make real-time microscopic observations of cement degradation experimentally challenging. Here, we present an in situ 3D dynamic X-ray micro computed tomography (μ-CT) study of well cement carbonation at realistic reservoir stress, pore-pressure, and temperature conditions. The high-resolution time-lapse 3D images allow monitoring the progress of reaction fronts in Portland cement, including density changes, sample deformation, and mineral precipitation and dissolution. By switching between flow and nonflow conditions of CO₂-saturated water through cement, we were able to delineate regimes dominated by calcium carbonate precipitation and dissolution. For the first time, we demonstrate experimentally the impact of the flow history on CO₂ leakage risk for cement plugging. In-situ μ-CT experiments combined with geochemical modeling provide unique insight into the interactions between CO₂ and cement, potentially helping in assessing the risks of CO₂ storage in geological reservoirs.

中文翻译：

二氧化碳储存条件下波特兰水泥碳化的实时3D观测。

枯竭的油层被认为是应对全球CO ₂储存挑战的可行解决方案。关键问题是井是否可以用水泥适当密封以阻止CO ₂逸出。在储层条件下，CO ₂处于超临界状态，所涉及的高压和高温使得实时微观观察水泥降解的实验具有挑战性。在这里，我们提出了在实际油藏应力，孔隙压力和温度条件下井水泥碳化的原位3D动态X射线计算机断层扫描（μ-CT）研究。高分辨率延时3D图像可监控波特兰水泥中反应前沿的进展，包括密度变化，样品变形以及矿物沉淀和溶解。通过在CO _2的流动和非流动条件之间切换-通过水泥的饱和水，我们能够描绘出以碳酸钙沉淀和溶解为主的体系。首次，我们通过实验证明了流动历史对水泥堵塞CO ₂泄漏风险的影响。原位μ-CT实验与地球化学建模相结合，可提供有关CO ₂与水泥之间相互作用的独特见解，从而有可能帮助评估地质储层中CO ₂储存的风险。

更新日期：2020-07-07

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