Energy, Environment and Sustainable Sciences
RESEARCH ARTICLE   (Open Access)

Current Status Overview of CO2 Displacement for Natural Gas Hydrate Recovery and Shale Storage: Physical, Chemical, and Mechanical Effects

Fatma Yehia1, 2, Akram Ali Nasser Mansoor Al-Haimi1, 2, Chuangji Feng1, 2, Cao Yu1, 2, Chao Yang2,*, Lihua Liu2,*

+ Author Affiliations

Energy Environment & Economy 3(1) 1-8 https://doi.org/10.25163/energy.3110266

Submitted: 15 April 2025  Revised: 02 June 2025  Published: 07 June 2025 

Abstract

Natural gas hydrates, often called "frozen energy," represent a significant potential energy resource. CO2 displacement recovery has emerged as a promising method for methane extraction and carbon sequestration. This comprehensive Overview provides a detailed analysis of the current status of CO2 displacement recovery in natural gas hydrate (NGH) systems, especially in shale formations, emphasizing the physical, chemical, and mechanical effects (3E). The potential of scCO2 as a viable method for carbon sequestration and its interactions with shale rock are explored comprehensively. The study synthesizes recent advancements in understanding how scCO2 impacts physical, chemical, and mechanical effects (3E) associated with scCO2 storage in shale. Physically, the review addresses the impact of scCO2 on shale porosity and permeability, while chemically, it explores the reactions between scCO2, shale minerals, and formation fluids. Mechanically, the report summarizes how scCO2 influences the mechanical strength and deformation behavior of shale formations. The dual role of this technology in energy production and CO2 sequestration is highlighted, making it a crucial focus area for sustainable energy strategies.

Keywords: Natural gas hydrates, CO2 Displacement Recovery, CO2 geological sequestration (CGS), SCCO2 storage, shale formations.

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