Fracture Evolution Characteristics and Permeability of Coal Treated with CO2 Phase Transition Fracturing
CO2相転移破砕処理炭のき裂進展特性と浸透性 (AI 翻訳)
Yongliang He, Zhuo Li, Zhen Zhang, Gaofeng Liu, George Barakos, Ping Chang
🤖 gxceed AI 要約
日本語
本研究は、CO2相転移破砕（CO2-PTF）による石炭の浸透性向上メカニズムを実験的に解明した。破砕圧力120,150,185MPaで試験し、SEM・CT・浸透率測定を組み合わせて、総破砕体積分率が一桁、絶対浸透率が1〜2桁向上することを示した。CO2-PTFの圧力が浸透性に指数関数的な向上効果をもたらすことを明らかにした。
English
This study experimentally clarifies the permeability enhancement mechanism of coal via CO2 phase transition fracturing (CO2-PTF). Tests at 120, 150, and 185 MPa show that total fracture volume fraction increases by an order of magnitude and absolute permeability by one to two orders, revealing an exponential-enhancement effect of CO2-PTF pressure on coal permeability.
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
日本では炭層メタン生産は限定的だが、CO2圧入を伴う破砕技術はCCUSの一部として応用可能性がある。北海道や福岡等の炭層中のCO2貯留・利用試験に示唆を与え得る。
In the global GX context
The paper contributes to global CCUS literature by quantifying how CO2-PTF enhances permeability, supporting CO2 utilization in coal seams for enhanced gas recovery and potential storage—relevant to CCUS deployment strategies.
👥 読者別の含意
🔬研究者:CO2-PTFの浸透性向上メカニズムを定量化した知見は、CCUS型破砕技術のモデル検証に活用できる。
🏢実務担当者:CCUSやCBM事業者にとって、CO2破砕圧力の設計パラメータと期待される浸透性向上度の参考になる。
📄 Abstract（原文）
Fracturing pressure serves as a pivotal parameter governing fracture expansion and permeability improvement, which is essential to enhancing coalbed methane (CBM) production via CO2 phase transition fracturing (CO2-PTF). In this study, laboratory CO2-PTF experiments on coal were performed under fracturing pressures of 120 MPa, 150 MPa and 185 MPa. Combining scanning electron microscopy (SEM), computed tomography (CT) scanning and permeability testing, the fracture evolution characteristics and permeability enhancement effect of coal samples were quantitatively analyzed. The research results show that CO2-PTF can raise the change rate of total fracture volume fraction by an order of magnitude, with absolute permeability being enhanced by one–two orders of magnitude, which further indicates an exponential-enhancement effect of CO2-PTF pressure on coal permeability. The exponential-enhancement effect of CO2-PTF pressure on coal permeability is closely associated with CO2-PTF processes. The early high-pressure CO2 jet stage main influences the fracture generation effect, and the subsequent quasi-static high-pressure gas stage induces the fracture expansion–transformation effect; collectively, these processes cause the exponential enhancement in coal permeability. The above analysis can offer theoretical guidance for the technical improvement and field application optimization of CO2-PTF and efficient enhancement in CBM recovery.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.3390/en19153569first seen 2026-07-31 06:20:07
🔔 こうした論文の新着を逃したくない方は キーワードアラート に登録（無料・3キーワードまで）。
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。