Study on Gas-Phase State Evolution and Dynamic Mechanism of High-Temperature and -Pressure Microfluidic-Saturated CO2 Mixture System
高温高圧マイクロ流体飽和CO2混合系における気相状態進化と動的メカニズムの研究 (AI 翻訳)
Xiaohua Tan, Xiao Jun Zhou, Peng Xu, Bin Chen
🤖 gxceed AI 要約
日本語
本研究は、CCUS貯留層条件でのCO2減圧時の気相進化を可視化する高温高圧マイクロ流体プラットフォームを開発。気泡析出・合体・一時閉塞の3段階を同定し、毛管力による閉塞安定性基準を確立。砂岩貯留層でのCO2輸送予測と注入戦略最適化に貢献する。
English
This study developed a high-temperature, high-pressure microfluidic platform to visualize and quantify gas-phase evolution during CO2 depressurization under reservoir conditions. Three key stages were identified: gas precipitation, coalescence-induced temporary plugging, and two-phase flow coordination. A capillary-dominated stability criterion was established, providing pore-scale insights for predicting CO2 transport and optimizing injection strategies in CCUS projects, particularly in sandstone reservoirs.
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
日本はGX戦略の一環としてCCUSを推進しており、苫小牧等での実証が進む。本研究成果は、CO2圧入・貯留における気相挙動のメカニズム理解を深め、貯留効率と安全性の予測精度向上に資する。
In the global GX context
CCUS is a critical component of global decarbonization, especially for hard-to-abate sectors. This study provides mechanistic understanding of CO2 behavior at the pore scale, improving the reliability of storage projects and informing injection-production optimization to enhance storage security and efficiency worldwide.
👥 読者別の含意
🔬研究者:Researchers in CCUS and porous media can use the identified three-stage evolution and stability criterion as a foundation for further modeling and experimental validation.
🏢実務担当者:CCUS project operators can apply the insights on temporary plugging and bubble migration to optimize injection pressure and reduce the risk of gas leakage.
🏛政策担当者:Policymakers can note that such fundamental research supports the technical credibility of CCUS as a climate mitigation option, guiding support for R&D and demonstration projects.
📄 Abstract（原文）
The pore-scale evolution of the gas phase during carbon dioxide (CO2) depressurization is a key control factor governing the storage efficiency and safety of CO2 geological storage and utilization [i.e., carbon capture, utilization, and storage (CCUS)]. However, the transient mechanisms underlying the sequential process of “gas precipitation-coalescence-temporary plugging” under reservoir conditions have not been fully elucidated, particularly in conventional sandstone media, which limits reliable prediction of CO2 distribution. In this work, a high-temperature, high-pressure (HTHP) microfluidic platform (80°C, 4–42 MPa) was developed to enable in-situ visualization and quantitative investigation of this phase evolution process. Three key stages were identified as (1) gas precipitation–dominated growth, where dissolved CO2 preferentially nucleates and expands along pore interfaces; (2) coalescence-induced temporary plugging, in which bubbles bridge pore throats and locally divert flow, governed by capillary force, with a critical rupture pressure difference of ≈500 Pa; and (3) microbubble-liquid (two-phase) migration/flow coordinated, where secondary nucleation and microbubble coalescence enhance gas connectivity and reshape the flow network. We further quantified the evolution of bubble size distribution and established a capillary-dominated stability criterion for temporary plugging. These findings provide mechanistic insight and a pore-scale basis for predicting CO2 transport and optimizing injection-production strategies in CCUS projects, particularly in conventional sandstone reservoirs.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.2118/232793-pafirst seen 2026-05-05 23:59:00
gxceed は公開メタデータに基づく研究支援データセットです。要約・翻訳・解説は AI 支援で生成されています。 最終的な解釈・検証は利用者が原典資料に基づいて行うことを前提とします。