Main controlling factors and development patterns of high-quality igneous rock reservoirs in the mesozoic of the Qikou Sag
The Mesozoic volcanic reservoirs in Qiqikou Sag are complex and diverse. Identifying the characteristics and main controlling factors of high-quality volcanic reservoirs is the key to improve the reserves and production of oil and gas in this area. The establishment of volcanic rock development mode...
Saved in:
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2025-08-01
|
| Series: | Frontiers in Earth Science |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2025.1612612/full |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849390641557012480 |
|---|---|
| author | Changwei Chen Hongjun Li Xiugang Pu Haiyue Yuan Xiaowei Dong Feipeng Zhang Lixin Fu Yu Cui Haodong Li |
| author_facet | Changwei Chen Hongjun Li Xiugang Pu Haiyue Yuan Xiaowei Dong Feipeng Zhang Lixin Fu Yu Cui Haodong Li |
| author_sort | Changwei Chen |
| collection | DOAJ |
| description | The Mesozoic volcanic reservoirs in Qiqikou Sag are complex and diverse. Identifying the characteristics and main controlling factors of high-quality volcanic reservoirs is the key to improve the reserves and production of oil and gas in this area. The establishment of volcanic rock development model provides a reference for further study of volcanic reservoirs. Through core observation, thin section identification, pore permeability and pore structure analysis of volcanic reservoir, combined with production data, on the basis of clarifying reservoir characteristics, the main controlling factors and development modes of high-quality reservoir development are analyzed. The results show that the Mesozoic in Qikou Sag mainly develops neutral andesite and basic basalt of overflow facies, followed by volcanic breccia and tuff of explosive facies. On the whole, the volcanic rock reservoirs belong to high porosity-low permeability and medium porosity-low permeability reservoirs. The physical properties of the andesite reservoir in the overflow phase are the best, showing the characteristics of high porosity-medium permeability. The reservoir space is dominated by secondary pores and fractures, among which dissolution pores are the most important reservoir space types of Mesozoic volcanic reservoirs. Favorable lithofacies and lithology are the foundation for the development of high-quality reservoirs. Favorable lithofacies and lithology are the foundation for the development of high-quality reservoirs, while weathering and dissolution are the key factors for the development of high-quality reservoirs. Fractures further improve the storage performance of igneous rock reservoirs. The dissolution of soluble minerals or volcanic ash in volcanic rocks that have undergone weathering and denudation for a long time produces a large number of secondary dissolution pores. The development of fractures further improves the reservoir physical properties and eventually develops into a weathering crust reservoir. The volcanic rocks far away from the weathering crust increase the reservoir physical properties through the later structural fractures and develop into the inner reservoir. |
| format | Article |
| id | doaj-art-d15d8e95dccf4bf786b5255f4c1b841b |
| institution | Kabale University |
| issn | 2296-6463 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj-art-d15d8e95dccf4bf786b5255f4c1b841b2025-08-20T03:41:26ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632025-08-011310.3389/feart.2025.16126121612612Main controlling factors and development patterns of high-quality igneous rock reservoirs in the mesozoic of the Qikou SagChangwei Chen0Hongjun Li1Xiugang Pu2Haiyue Yuan3Xiaowei Dong4Feipeng Zhang5Lixin Fu6Yu Cui7Haodong Li8Petrochina Dagang Oilfield Compamy, Tianjin, ChinaPetrochina Dagang Oilfield Compamy, Tianjin, ChinaPetrochina Dagang Oilfield Compamy, Tianjin, ChinaCollege of Earth Sciences, Jilin University, Changchun, ChinaPetrochina Dagang Oilfield Compamy, Tianjin, ChinaPetrochina Dagang Oilfield Compamy, Tianjin, ChinaPetrochina Dagang Oilfield Compamy, Tianjin, ChinaPetrochina Dagang Oilfield Compamy, Tianjin, ChinaPetrochina Dagang Oilfield Compamy, Tianjin, ChinaThe Mesozoic volcanic reservoirs in Qiqikou Sag are complex and diverse. Identifying the characteristics and main controlling factors of high-quality volcanic reservoirs is the key to improve the reserves and production of oil and gas in this area. The establishment of volcanic rock development model provides a reference for further study of volcanic reservoirs. Through core observation, thin section identification, pore permeability and pore structure analysis of volcanic reservoir, combined with production data, on the basis of clarifying reservoir characteristics, the main controlling factors and development modes of high-quality reservoir development are analyzed. The results show that the Mesozoic in Qikou Sag mainly develops neutral andesite and basic basalt of overflow facies, followed by volcanic breccia and tuff of explosive facies. On the whole, the volcanic rock reservoirs belong to high porosity-low permeability and medium porosity-low permeability reservoirs. The physical properties of the andesite reservoir in the overflow phase are the best, showing the characteristics of high porosity-medium permeability. The reservoir space is dominated by secondary pores and fractures, among which dissolution pores are the most important reservoir space types of Mesozoic volcanic reservoirs. Favorable lithofacies and lithology are the foundation for the development of high-quality reservoirs. Favorable lithofacies and lithology are the foundation for the development of high-quality reservoirs, while weathering and dissolution are the key factors for the development of high-quality reservoirs. Fractures further improve the storage performance of igneous rock reservoirs. The dissolution of soluble minerals or volcanic ash in volcanic rocks that have undergone weathering and denudation for a long time produces a large number of secondary dissolution pores. The development of fractures further improves the reservoir physical properties and eventually develops into a weathering crust reservoir. The volcanic rocks far away from the weathering crust increase the reservoir physical properties through the later structural fractures and develop into the inner reservoir.https://www.frontiersin.org/articles/10.3389/feart.2025.1612612/fulligneous rockreservoirscontrolling factorsdevelopment patternsQikou sagmesozoic |
| spellingShingle | Changwei Chen Hongjun Li Xiugang Pu Haiyue Yuan Xiaowei Dong Feipeng Zhang Lixin Fu Yu Cui Haodong Li Main controlling factors and development patterns of high-quality igneous rock reservoirs in the mesozoic of the Qikou Sag Frontiers in Earth Science igneous rock reservoirs controlling factors development patterns Qikou sag mesozoic |
| title | Main controlling factors and development patterns of high-quality igneous rock reservoirs in the mesozoic of the Qikou Sag |
| title_full | Main controlling factors and development patterns of high-quality igneous rock reservoirs in the mesozoic of the Qikou Sag |
| title_fullStr | Main controlling factors and development patterns of high-quality igneous rock reservoirs in the mesozoic of the Qikou Sag |
| title_full_unstemmed | Main controlling factors and development patterns of high-quality igneous rock reservoirs in the mesozoic of the Qikou Sag |
| title_short | Main controlling factors and development patterns of high-quality igneous rock reservoirs in the mesozoic of the Qikou Sag |
| title_sort | main controlling factors and development patterns of high quality igneous rock reservoirs in the mesozoic of the qikou sag |
| topic | igneous rock reservoirs controlling factors development patterns Qikou sag mesozoic |
| url | https://www.frontiersin.org/articles/10.3389/feart.2025.1612612/full |
| work_keys_str_mv | AT changweichen maincontrollingfactorsanddevelopmentpatternsofhighqualityigneousrockreservoirsinthemesozoicoftheqikousag AT hongjunli maincontrollingfactorsanddevelopmentpatternsofhighqualityigneousrockreservoirsinthemesozoicoftheqikousag AT xiugangpu maincontrollingfactorsanddevelopmentpatternsofhighqualityigneousrockreservoirsinthemesozoicoftheqikousag AT haiyueyuan maincontrollingfactorsanddevelopmentpatternsofhighqualityigneousrockreservoirsinthemesozoicoftheqikousag AT xiaoweidong maincontrollingfactorsanddevelopmentpatternsofhighqualityigneousrockreservoirsinthemesozoicoftheqikousag AT feipengzhang maincontrollingfactorsanddevelopmentpatternsofhighqualityigneousrockreservoirsinthemesozoicoftheqikousag AT lixinfu maincontrollingfactorsanddevelopmentpatternsofhighqualityigneousrockreservoirsinthemesozoicoftheqikousag AT yucui maincontrollingfactorsanddevelopmentpatternsofhighqualityigneousrockreservoirsinthemesozoicoftheqikousag AT haodongli maincontrollingfactorsanddevelopmentpatternsofhighqualityigneousrockreservoirsinthemesozoicoftheqikousag |