The primary controlling factors of the occurrence state of deep high-rank coalbed methane in eastern Ordos Basin
Introduction: This study investigates the key controlling factors of the occurrence state of deep coalbed methane (CBM). CBM is an abundant energy resource in China, particularly in deep coal seams. However, the exploration and development of deep CBM face numerous challenges, and the understanding...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2024-01-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2024.1340523/full |
| _version_ | 1797349025154859008 |
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| author | Yujiang Shi Yufei He Jinbin Wan Jianmeng Sun Jingbo Zeng Ruikang Cui |
| author_facet | Yujiang Shi Yufei He Jinbin Wan Jianmeng Sun Jingbo Zeng Ruikang Cui |
| author_sort | Yujiang Shi |
| collection | DOAJ |
| description | Introduction: This study investigates the key controlling factors of the occurrence state of deep coalbed methane (CBM). CBM is an abundant energy resource in China, particularly in deep coal seams. However, the exploration and development of deep CBM face numerous challenges, and the understanding of the controlling factors of its occurrence state is still limited.Methods: The study reveals that deep CBM primarily exists in the form of adsorbed gas and free gas within the pore-fracture system of coal. Factors such as formation temperature, formation pressure, pore structure, and water saturation collectively influence the occurrence state of deep CBM. By employing the Simplified Local Density (SLD) model and molecular simulation methods.Results and discussion: This study examines the impact of two external geological control factors (formation temperature, formation pressure) and three internal geological control factors (pore size, water saturation, Specific surface area) on deep CBM and establishes a theoretical model for gas content. Finally, the relationship between the adsorbed gas, free gas, total gas content, and burial depth is calculated using the model, uncovering the primary factors controlling the occurrence state of deep CBM. This research is of significant importance in providing key parameters for gas content in deep coal and optimizing deep CBM exploration. |
| first_indexed | 2024-03-08T12:24:10Z |
| format | Article |
| id | doaj.art-6242002951164f15a97478cd33743ccd |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-03-08T12:24:10Z |
| publishDate | 2024-01-01 |
| publisher | Frontiers Media S.A. |
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| series | Frontiers in Earth Science |
| spelling | doaj.art-6242002951164f15a97478cd33743ccd2024-01-22T13:17:39ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632024-01-011210.3389/feart.2024.13405231340523The primary controlling factors of the occurrence state of deep high-rank coalbed methane in eastern Ordos BasinYujiang Shi0Yufei He1Jinbin Wan2Jianmeng Sun3Jingbo Zeng4Ruikang Cui5China National Logging Corporation, Xi’an, Shaanxi, ChinaChina National Logging Corporation, Xi’an, Shaanxi, ChinaChina National Logging Corporation, Xi’an, Shaanxi, ChinaSchool of Geosciences, China University of Petroleum (East China), Qingdao, ChinaChina National Logging Corporation, Xi’an, Shaanxi, ChinaSchool of Geosciences, China University of Petroleum (East China), Qingdao, ChinaIntroduction: This study investigates the key controlling factors of the occurrence state of deep coalbed methane (CBM). CBM is an abundant energy resource in China, particularly in deep coal seams. However, the exploration and development of deep CBM face numerous challenges, and the understanding of the controlling factors of its occurrence state is still limited.Methods: The study reveals that deep CBM primarily exists in the form of adsorbed gas and free gas within the pore-fracture system of coal. Factors such as formation temperature, formation pressure, pore structure, and water saturation collectively influence the occurrence state of deep CBM. By employing the Simplified Local Density (SLD) model and molecular simulation methods.Results and discussion: This study examines the impact of two external geological control factors (formation temperature, formation pressure) and three internal geological control factors (pore size, water saturation, Specific surface area) on deep CBM and establishes a theoretical model for gas content. Finally, the relationship between the adsorbed gas, free gas, total gas content, and burial depth is calculated using the model, uncovering the primary factors controlling the occurrence state of deep CBM. This research is of significant importance in providing key parameters for gas content in deep coal and optimizing deep CBM exploration.https://www.frontiersin.org/articles/10.3389/feart.2024.1340523/fulldeep coalbed methaneoccurrence statecontrolling factorssimplified local density modelmolecular simulation |
| spellingShingle | Yujiang Shi Yufei He Jinbin Wan Jianmeng Sun Jingbo Zeng Ruikang Cui The primary controlling factors of the occurrence state of deep high-rank coalbed methane in eastern Ordos Basin Frontiers in Earth Science deep coalbed methane occurrence state controlling factors simplified local density model molecular simulation |
| title | The primary controlling factors of the occurrence state of deep high-rank coalbed methane in eastern Ordos Basin |
| title_full | The primary controlling factors of the occurrence state of deep high-rank coalbed methane in eastern Ordos Basin |
| title_fullStr | The primary controlling factors of the occurrence state of deep high-rank coalbed methane in eastern Ordos Basin |
| title_full_unstemmed | The primary controlling factors of the occurrence state of deep high-rank coalbed methane in eastern Ordos Basin |
| title_short | The primary controlling factors of the occurrence state of deep high-rank coalbed methane in eastern Ordos Basin |
| title_sort | primary controlling factors of the occurrence state of deep high rank coalbed methane in eastern ordos basin |
| topic | deep coalbed methane occurrence state controlling factors simplified local density model molecular simulation |
| url | https://www.frontiersin.org/articles/10.3389/feart.2024.1340523/full |
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