地熱貯留層における注入性低下の解明：地層損傷メカニズムから持続可能な緩和策まで

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

🔬研究者:地熱還元の目詰まり機構を物理・化学・生物横断で整理した枠組みとして、予測モデル研究の出発点にできる。

🏢実務担当者:還元井のモニタリング・スケール抑制・ろ過・運用最適化の設計判断に活用できる。

🏛政策担当者:地熱開発の長期安定運転支援策や環境影響評価の技術的根拠として参照できる。

ABSTRACT Geothermal energy is a promising renewable resource capable of providing stable, low-carbon baseload power; however, the long-term performance of geothermal reinjection systems is often constrained by injectivity decline caused by formation damage and clogging. Although individual impairment mechanisms have been widely investigated, a comprehensive understanding of the coupled physical, chemical, and biological processes controlling clogging evolution remains limited. This review examines clogging mechanisms in geothermal reinjection systems by drawing on evidence from field observations, laboratory experiments, geochemical studies, and numerical simulations. It discusses the origin, evolution, controlling factors, and mitigation strategies associated with physical clogging caused by particle invasion and fines migration, chemical clogging driven by mineral precipitation, scaling, and corrosion, and biological clogging resulting from microbial growth, biofilm formation, and biomass accumulation. Field and experimental studies show that suspended solids, silica and carbonate scaling, corrosion by-products, and microbially induced deposits can substantially reduce permeability and injectivity, particularly in near-wellbore regions. The severity of impairment is strongly influenced by fluid chemistry, temperature, pressure, particle-size distribution, flow conditions, and reservoir characteristics. Advanced monitoring technologies, geochemical modeling, filtration systems, scale inhibitors, thermal and chemical management strategies, and reservoir-specific operational optimization have shown potential for mitigating clogging-related damage. Nevertheless, a comprehensive review examining physical, chemical, and biological clogging mechanisms collectively in geothermal reinjection systems remains lacking, limiting the development of predictive and sustainable mitigation strategies. By consolidating current knowledge, this review provides a mechanistic basis for improving injectivity prediction and supporting the long-term sustainability of geothermal reinjection operations.

• openalex https://doi.org/10.1016/j.rineng.2026.113612first seen 2026-11-08 04:46:58 · last seen 2026-11-13 04:52:46