gxceed
← 論文一覧に戻る

A Prior Assessment of CO2-Fracturing in Gas Hydrate Reservoirs for CO2-CH4 Swapping and CO2 Storage

ガスハイドレート層におけるCO2-CHA4交換とCO2貯留のためのCO2破砕の事前評価 (AI 翻訳)

Guo B, Islam MT

Research Squareプレプリント2026-05-21#CCUS
DOI: 10.21203/rs.3.rs-8989858/v1
原典: https://doi.org/10.21203/rs.3.rs-8989858/v1

🤖 gxceed AI 要約

日本語

本研究は、CO2を破砕流体として利用し、ガスハイドレート層内でのCO2-CH4交換プロセスにおける圧入性向上のための事前評価を目的としている。新たな解析モデルを開発し、CO2注入率や性状が破砕ネットワーク形成に与える影響を分析。高注入率・高粘性は短い破砕を増やすことを示した。CCUSと天然ガス回収の両立に貢献するツールを提供。

English

This study provides a prior assessment of using CO2 as fracturing fluid to enhance injectivity in gas hydrate reservoirs for CO2-CH4 swapping and CO2 storage. A new analytical model for hydraulic fracture initiation and propagation is developed and tested with generic offshore data. Results show that high CO2 injection rate and high viscosity increase the number of short fractures. This work offers a useful tool for integrating CCUS with natural gas recovery.

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

日本はガスハイドレートの研究開発を進めており、CCUSの実証実験も行われている。本モデルは、CO2貯留とエネルギー回収を組み合わせる可能性を示し、将来的な日本の資源政策やCCUS戦略に示唆を与える。

In the global GX context

This paper advances CCUS by proposing CO2 fracturing for simultaneous CO2 storage and CH4 recovery from gas hydrates. The analytical model provides a quick assessment tool relevant for global CCUS projects, especially in offshore environments. It supports the integration of carbon storage with energy production, aligning with net-zero goals.

👥 読者別の含意

🔬研究者:Researchers in CCUS and hydrate engineering can utilize the FracPropag model for designing CO2 fracturing operations in low-permeability reservoirs.

🏢実務担当者:Practitioners in carbon storage and gas recovery can apply this prior assessment to evaluate feasibility of CO2 fracturing for enhanced injectivity and storage.

🏛政策担当者:Policymakers can consider this integrated CCUS-EOR approach as a viable option for decarbonizing natural gas production while ensuring CO2 storage.

📄 Abstract（原文）

<title>Abstract</title> <p> Carbon dioxide (CO <sub>2</sub> ) leakage from geological storage structures has become a major concern in Carbon Capture, Usage, and Storage (CCUS) operations. CO <sub>2</sub> -CH <sub>4</sub> swap process in gas hydrate reservoirs can lock CO <sub>2</sub> in place in solid form and still produce natural gas. However, well injectivity in gas hydrate reservoirs is normally extremely low due to the slow heat transfer rate in the swapping process. The objective of this study was to provide a prior assessment of using CO <sub>2</sub> as a fracturing fluid to create highly connective fracture networks in gas hydrate reservoirs for enhancing well-injectivity. A new analytical model for sequential initiation and simultaneous propagation of hydraulic fractures was developed in this study to identify the factors affecting the population of hydraulic fractures. The model was coded in a computer program <italic>FracPropag</italic> for quick analyses. A sensitivity study was performed with data from a generic offshore gas hydrate reservoir. Simulation result indicates that the number and lengths of hydraulic fractures depend on CO <sub>2</sub> injection rate and CO <sub>2</sub> properties. High rate of CO <sub>2</sub> injection will promote generation of more short fractures. High-viscosity and dilatancy of CO <sub>2</sub> stream will increase the number of short hydraulic fractures. All these effects are attributed to the CO <sub>2</sub> flow friction in the fractures being created. This work provides a useful tool for assessment of CO <sub>2</sub> -fracturing in gas hydrate reservoirs. </p>

🔗 Provenance — このレコードを発見したソース

🔔 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。