塩水帯水層における注入CO2の長期的運命のモデル化：多相流、溶解、反応、リップニングを結合した統合フレームワーク
Modeling the long-term fate of injected CO 2 in saline aquifers: An integrated framework coupling multiphase flow, dissolution, reaction, and ripening (原題)
Ruiqi Chen, Wenjie Xu, Yunmin Chen, Qingping Li, Tianyuan Zheng, B. Guo
🤖 gxceed AI 要約
日本語
地層貯留（GCS）におけるCO2の長期的挙動を統合数値モデルで解析。溶解・反応・重力駆動リップニング等の相互作用を再現し、500年後の溶解トラップが42.8%に達する一方、反応性トラップは1%未満と定量化。低い鉛直浸透率が溶解トラップへの遷移を阻害することを示した。
English
An integrated numerical framework models long-term CO2 fate in saline aquifers, coupling multiphase flow, dissolution, reaction, and ripening. After 500 years, dissolved CO2 accounts for 42.8% of trapped mass, while reactive trapping is <1%. Low vertical permeability hinders transition to dissolution trapping, reducing storage by two-thirds when anisotropy increases.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本ではCCSがカーボンニュートラル実現の鍵とされ、2023年にCCS事業法が成立。本モデルは貯留層選定や長期安全性評価に資するため、国内のCCSプロジェクトや規制当局の審査に有用な知見を提供する。
In the global GX context
Globally, CCS is critical for net-zero targets, with projects requiring long-term storage security. This modeling framework offers a practical tool for assessing CO2 plume evolution and trapping mechanisms, supporting site selection and risk assessment for CCS deployment worldwide.
👥 読者別の含意
🔬研究者:Provides a comprehensive modeling framework for CO2 trapping mechanisms, useful for advancing CCS simulation research.
🏢実務担当者:Offers insights for CCS project developers to optimize injection strategies and assess long-term storage security.
🏛政策担当者:Informs regulatory frameworks for CCS site approval and long-term liability assessment.
📄 Abstract（原文）
Abstract. Geological carbon sequestration (GCS) mitigates climate change by storing anthropogenic carbon dioxide (CO2) in geological formations. CO2 undergoes complex physical and chemical transformations in deep geological formations, governed by various interacting trapping mechanisms. Because the trapping mechanisms operate over a wide range of different timescales, their long-term interplay remains unclear. We develop an integrated numerical modeling framework to analyze and track the plume footprint and phase transition processes that occur throughout the entire cycle of the injected CO2 in saline aquifers. The key novelty of the modeling framework lies in its capability to describe multiple hydrodynamic processes and their interactions, including injection, dissolution-driven convection, reactive transport, and gravity-induced Ostwald ripening. The results suggest that dissolution reduces the lateral migration of free-state CO2, while geochemical reactions generate preferential pathways for CO2-rich flow. For the scenarios we analyze, after 500 years of mass transfer, dissolved CO2 accounts for 42.80 % of total trapped CO2 mass, while reactive CO2 contributes less than 1 %. The results also illustrate that low vertical permeability is unfavorable for the long-term transition of CO2 from physical trapping to dissolution trapping. When the permeability anisotropy index γ increases from 0.5 to 10, the total dissolution storage amount within the domain is reduced to one-third over the 500-year simulation period. This integrated modeling framework provides critical insights into the long-term evolution of CO2 plume migration and phase transition behavior, thereby offering a practical tool to quantitatively assess the long-term fate of the injected CO2 in saline aquifers.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://hess.copernicus.org/articles/30/5395/2026/hess-30-5395-2026.pdffirst seen 2026-08-30 05:28:48 · last seen 2026-09-22 05:16:52
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