Geological Control Mechanism of Coalbed Methane Gas Component Evolution Characteristics in the Daning-Jixian Area, Ordos Basin, China

Zhao, Bo; Liu, Dameng; Cai, Yidong; Zhao, Zheng; Sun, Fengrui

doi:10.1021/acs.energyfuels.3c03462

Energy Fuels

2023

DOI: 10.1021/acs.energyfuels.3c03462

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Geological Control Mechanism of Coalbed Methane Gas Component Evolution Characteristics in the Daning-Jixian Area, Ordos Basin, China

Bo Zhao,

Dameng Liu,

Yidong Cai

et al.

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2024

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Cited by 2 publications

References 29 publications

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Characterizing coal gas reservoirs: A multiparametric evaluation based on geological and geophysical methods

Liu,

Zhao,

Cai

et al. 2024

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Characterizing coal gas reservoirs: A multiparametric evaluation based on geological and geophysical methods

Liu,

Zhao,

Cai

et al. 2024

Gondwana Research

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Geological Controls on Gas Content of Deep Coal Reservoir in the Jiaxian Area, Ordos Basin, China

Xu,

Li,

Sun

et al. 2024

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Deep coalbed methane (DCBM) reservoirs hold exceptional potential for diversifying energy sources. The Ordos Basin has attracted much attention due to its enormous resource reserves of DCBM. This work focuses on the Jiaxian area of the Ordos basin, and the multi-factor quantitative evaluation method on the sealing of cap rocks is established. The abundant geologic and reservoir information is synthesized to explore variable factors affecting the gas content. Results indicate that the sealing capacity of the coal seam roof in the Jiaxian area, with a mean sealing index of 3.12, surpasses the floor’s sealing capacity by 13.87%, which averages 2.74. The sealing of the coal seam roof has a more positive impact on the enrichment of coalbed methane (CBM). In addition, the conditions for preserving gas would be boosted as coal seam thickness increased, leading to enhanced gas content in coal seams. The CH4 content increases by an average of ~2.38 m3/t as coal seam thickness increases with the interval of 1 m. The increasing burial depth represents the incremental maturity of organic matter and the gas generation ability in coal seams, which contributes to improving the gas content in coal seams. There is a positive correlation between the degree of coal fragmentation and the gas content of the coal seam to a certain extent. These findings provide valuable insights for targeted drilling strategies and enhancing natural gas production capacity in the Jiaxian area of the Ordos Basin.

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Geological Control Mechanism of Coalbed Methane Gas Component Evolution Characteristics in the Daning-Jixian Area, Ordos Basin, China

Cited by 2 publications

References 29 publications

Characterizing coal gas reservoirs: A multiparametric evaluation based on geological and geophysical methods

Characterizing coal gas reservoirs: A multiparametric evaluation based on geological and geophysical methods

Geological Controls on Gas Content of Deep Coal Reservoir in the Jiaxian Area, Ordos Basin, China

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