Subsurface Geomechanical Response to CO2 Sequestration in a Depleted Gas Reservoir
枯渇ガス貯留層におけるCO2貯留に対する地下地質力学応答 (AI 翻訳)
A. Mohamad-Hussein, R. Prioul, M. Giddins, J. Stefani, D. Thornton, N. Ruby
🤖 gxceed AI 要約
日本語
本論文は、枯渇ガス貯留層へのCO2貯留に伴う地質力学的応答を、流体流動–力学連成モデルを用いて評価した。40年間のガス生産、5年間の休止、2回のCO2圧入（塩水層と枯渇層）、25年間のモニタリングをシミュレーションし、間隙圧や応力・ひずみ、貯留層圧密、海底変形を予測。結果は4D地震探査の解釈や貯留層安全性評価に貢献する。
English
This study evaluates the geomechanical response of a depleted gas reservoir during CO2 sequestration using coupled fluid-flow and geomechanical modeling. It simulates 40 years of gas depletion, a five-year hiatus, two CO2 injection phases (into a saline aquifer and the depleted reservoir), and 25 years of post-injection monitoring. Results provide insights for safe CO2 containment, seismic monitoring, and industry best practices.
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
日本では苫小牧などのCCS実証が進んでおり、本成果は国内CCS事業の安全性評価やモニタリング計画に直接応用可能。特に、坑井や海底変形の予測は、日本の海洋CCSサイト（洋上）のリスク評価に有益。
In the global GX context
Globally, CCS is a key decarbonization strategy; this study offers benchmark data and workflows for assessing storage security and regulatory compliance. The coupled modeling approach and 4D seismic implications are relevant for operators and regulators worldwide.
👥 読者別の含意
🔬研究者:Provides a benchmark dataset and coupled modeling methodology for geomechanical response to CCS, valuable for further research on CO2 containment and monitoring.
🏢実務担当者:Offers operational insights for planning CO2 injection and monitoring programs in depleted gas reservoirs, aiding risk management and regulatory compliance.
🏛政策担当者:Demonstrates the importance of geomechanical modeling in CCS regulation; outcomes can inform storage security requirements and monitoring standards.
📄 Abstract（原文）
Carbon capture and storage (CCS) operation requires reliable prediction of subsurface processes to ensure storage security and regulatory compliance. The SEG Advanced Modeling (SEAM) CO2 project unites industrial partners to deliver benchmark datasets and workflows for CCS assessment. This study investigates the geomechanical response of a marine anticline to long-term gas depletion and CO2 sequestration. Using two-way coupled fluid-flow and geomechanical modeling to update fluid saturations, permeability and pore volume over time , the work evaluates reservoir performance, surface monitoring signals, and operational risks. The results provide critical insights for safe CO2 containment, seismic monitoring, and the development of industry best practices. The simulated system is bounded by one sealing fault, containing heterogeneous turbidite reservoirs interbedded with shale. The reservoir experienced (i) forty years of gas depletion from the upper reservoir unit, (ii) a five-year hiatus, (iii) two sequential twentyfive-year CO2 injection phases (first into a saline aquifer, then into the depleted reservoir), and (iv) twenty-five years of post-injection monitoring. The simulations track pore pressure and stresses-strains via a critical-state evolution law as well as petrophysical properties, reservoir compaction, and seafloor deformation. Results are used for geophysical modeling of impedance changes to predict 4D seismic response.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.56952/arma-2026-0054first seen 2026-07-20 05:29:51
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