Deep hydrocarbon charging and accumulation in complex fault blocks, the northern part of the eastern Liaohe depression, China
Deep exploration in complex fault-block regions is critical for global oil and gas development. As a representative region characterized by complex fault-block development, the northern part of the eastern Liaohe depression poses challenges in understanding the charging time and migration channels o...
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2025-05-01
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| Series: | Energy Exploration & Exploitation |
| Online Access: | https://doi.org/10.1177/01445987241310005 |
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| author | Che Shen Youlu Jiang Qiang Guo |
| author_facet | Che Shen Youlu Jiang Qiang Guo |
| author_sort | Che Shen |
| collection | DOAJ |
| description | Deep exploration in complex fault-block regions is critical for global oil and gas development. As a representative region characterized by complex fault-block development, the northern part of the eastern Liaohe depression poses challenges in understanding the charging time and migration channels of deep hydrocarbons due to its intricate structural and reservoir conditions. For this purpose, this study utilizes diverse geological data from recent explorations, employing the petrological characteristics of inclusions, homogenization temperatures, and simulations of the thermal burial history to investigate the charging times of deep hydrocarbons. It combines the diagenetic processes of the reservoir with tectonic evolution to reveal the charging pathways and dynamic processes of deep hydrocarbons in the northern part of the eastern Liaohe depression. The results indicate that there are two charging periods in the study area: the late Oligocene (32.9–27.5 Ma) and from the late Neogene to the present (8.7–0 Ma). During these critical periods, faults with high activity intensity and low fault section normal stress were in an open state, which can serve as pathways for the vertical long-distance migration of hydrocarbons. In the first charging period, a substantial volume of hydrocarbon expelled from the source rocks migrates vertically into the deep sandstone reservoir through opening faults, exhibiting characteristics of source–reservoir separation. Subsequently, a brief uplift at the end of the Oligocene halted hydrocarbon generation. In the second charging period, as the source rocks further matured, a substantial volume of natural gas was injected into the deep reservoirs. At this period, the faults approached the seal, preventing hydrocarbons from migrating vertically and allowing them to enter the deep sandstone reservoirs adjacent to the source rocks, reflecting characteristics of source–reservoir proximity. |
| format | Article |
| id | doaj-art-874d8cb8de754ce59de02ae8c8eca89a |
| institution | DOAJ |
| issn | 0144-5987 2048-4054 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Energy Exploration & Exploitation |
| spelling | doaj-art-874d8cb8de754ce59de02ae8c8eca89a2025-08-20T03:20:55ZengSAGE PublishingEnergy Exploration & Exploitation0144-59872048-40542025-05-014310.1177/01445987241310005Deep hydrocarbon charging and accumulation in complex fault blocks, the northern part of the eastern Liaohe depression, ChinaChe Shen0Youlu Jiang1Qiang Guo2 , Qingdao, Shandong Province, China , Qingdao, Shandong Province, China , Panjin, Liaoning, ChinaDeep exploration in complex fault-block regions is critical for global oil and gas development. As a representative region characterized by complex fault-block development, the northern part of the eastern Liaohe depression poses challenges in understanding the charging time and migration channels of deep hydrocarbons due to its intricate structural and reservoir conditions. For this purpose, this study utilizes diverse geological data from recent explorations, employing the petrological characteristics of inclusions, homogenization temperatures, and simulations of the thermal burial history to investigate the charging times of deep hydrocarbons. It combines the diagenetic processes of the reservoir with tectonic evolution to reveal the charging pathways and dynamic processes of deep hydrocarbons in the northern part of the eastern Liaohe depression. The results indicate that there are two charging periods in the study area: the late Oligocene (32.9–27.5 Ma) and from the late Neogene to the present (8.7–0 Ma). During these critical periods, faults with high activity intensity and low fault section normal stress were in an open state, which can serve as pathways for the vertical long-distance migration of hydrocarbons. In the first charging period, a substantial volume of hydrocarbon expelled from the source rocks migrates vertically into the deep sandstone reservoir through opening faults, exhibiting characteristics of source–reservoir separation. Subsequently, a brief uplift at the end of the Oligocene halted hydrocarbon generation. In the second charging period, as the source rocks further matured, a substantial volume of natural gas was injected into the deep reservoirs. At this period, the faults approached the seal, preventing hydrocarbons from migrating vertically and allowing them to enter the deep sandstone reservoirs adjacent to the source rocks, reflecting characteristics of source–reservoir proximity.https://doi.org/10.1177/01445987241310005 |
| spellingShingle | Che Shen Youlu Jiang Qiang Guo Deep hydrocarbon charging and accumulation in complex fault blocks, the northern part of the eastern Liaohe depression, China Energy Exploration & Exploitation |
| title | Deep hydrocarbon charging and accumulation in complex fault blocks, the northern part of the eastern Liaohe depression, China |
| title_full | Deep hydrocarbon charging and accumulation in complex fault blocks, the northern part of the eastern Liaohe depression, China |
| title_fullStr | Deep hydrocarbon charging and accumulation in complex fault blocks, the northern part of the eastern Liaohe depression, China |
| title_full_unstemmed | Deep hydrocarbon charging and accumulation in complex fault blocks, the northern part of the eastern Liaohe depression, China |
| title_short | Deep hydrocarbon charging and accumulation in complex fault blocks, the northern part of the eastern Liaohe depression, China |
| title_sort | deep hydrocarbon charging and accumulation in complex fault blocks the northern part of the eastern liaohe depression china |
| url | https://doi.org/10.1177/01445987241310005 |
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