Production Behavior of Hydrate-Bearing Sediments with Mixed Fracture- and Pore-Filling Hydrates
Most hydrate-bearing sediments worldwide exhibit mixed pore- and fracture-filling hydrates. Due to the high exploitation value, pore-filling hydrate production is the focus of current hydrate production research, and there is a lack of systematic research on the decomposition of fracture-filling hyd...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-06-01
|
| Series: | Journal of Marine Science and Engineering |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2077-1312/11/7/1321 |
| _version_ | 1797588794660093952 |
|---|---|
| author | Yaobin Li Xin Xin Tianfu Xu Yingqi Zang Zimeng Yu Huixing Zhu Yilong Yuan |
| author_facet | Yaobin Li Xin Xin Tianfu Xu Yingqi Zang Zimeng Yu Huixing Zhu Yilong Yuan |
| author_sort | Yaobin Li |
| collection | DOAJ |
| description | Most hydrate-bearing sediments worldwide exhibit mixed pore- and fracture-filling hydrates. Due to the high exploitation value, pore-filling hydrate production is the focus of current hydrate production research, and there is a lack of systematic research on the decomposition of fracture-filling hydrates and their effects on the evolution of temperature and pressure in hydrate-bearing sediments. If only the decomposition characteristics of pore-filling hydrates are studied while the fracture-filling hydrates decomposition and its effects on the hydrate-bearing sediments production process are ignored, the obtained research results would be inconsistent with the actual situation. Therefore, in this study, the effects of fracture-filling hydrates with different dipping angles on the hydrate production process were studied, and the necessity of considering the phenomenon of mixed pore- and fracture-filling hydrates in hydrate-bearing sediments was illustrated. On this basis, the simulation of a typical site (GMGS2-16) with mixed pore- and fracture-filling hydrates was constructed, and the production process was researched and optimized. The results indicated that: (a) fracture-filling hydrates formed in shallow fine-grained sediments and gradually approached the area of pore-filling hydrates, before a stable mixed zone was formed; (b) the occurrence of fracture-filling hydrates was conducive to the hydrate-bearing sediment depressurization production, and the promoting effect of the fracture-filling hydrate with smaller dipping angles was stronger; and (c) depressurization combined with heat injection could effectively compensate for the local low temperature and secondary hydrate caused by the mass decomposition of fracture-filled hydrates. |
| first_indexed | 2024-03-11T00:57:06Z |
| format | Article |
| id | doaj.art-c67705bc4da44b45803e84ecd2ee0fb7 |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-11T00:57:06Z |
| publishDate | 2023-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-c67705bc4da44b45803e84ecd2ee0fb72023-11-18T19:58:33ZengMDPI AGJournal of Marine Science and Engineering2077-13122023-06-01117132110.3390/jmse11071321Production Behavior of Hydrate-Bearing Sediments with Mixed Fracture- and Pore-Filling HydratesYaobin Li0Xin Xin1Tianfu Xu2Yingqi Zang3Zimeng Yu4Huixing Zhu5Yilong Yuan6Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, ChinaKey Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, ChinaKey Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, ChinaKey Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, ChinaKey Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, ChinaKey Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, ChinaKey Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, ChinaMost hydrate-bearing sediments worldwide exhibit mixed pore- and fracture-filling hydrates. Due to the high exploitation value, pore-filling hydrate production is the focus of current hydrate production research, and there is a lack of systematic research on the decomposition of fracture-filling hydrates and their effects on the evolution of temperature and pressure in hydrate-bearing sediments. If only the decomposition characteristics of pore-filling hydrates are studied while the fracture-filling hydrates decomposition and its effects on the hydrate-bearing sediments production process are ignored, the obtained research results would be inconsistent with the actual situation. Therefore, in this study, the effects of fracture-filling hydrates with different dipping angles on the hydrate production process were studied, and the necessity of considering the phenomenon of mixed pore- and fracture-filling hydrates in hydrate-bearing sediments was illustrated. On this basis, the simulation of a typical site (GMGS2-16) with mixed pore- and fracture-filling hydrates was constructed, and the production process was researched and optimized. The results indicated that: (a) fracture-filling hydrates formed in shallow fine-grained sediments and gradually approached the area of pore-filling hydrates, before a stable mixed zone was formed; (b) the occurrence of fracture-filling hydrates was conducive to the hydrate-bearing sediment depressurization production, and the promoting effect of the fracture-filling hydrate with smaller dipping angles was stronger; and (c) depressurization combined with heat injection could effectively compensate for the local low temperature and secondary hydrate caused by the mass decomposition of fracture-filled hydrates.https://www.mdpi.com/2077-1312/11/7/1321natural gas hydratefracture-filling hydratespore-filling hydratesnumerical simulationdepressurizationheat injection |
| spellingShingle | Yaobin Li Xin Xin Tianfu Xu Yingqi Zang Zimeng Yu Huixing Zhu Yilong Yuan Production Behavior of Hydrate-Bearing Sediments with Mixed Fracture- and Pore-Filling Hydrates Journal of Marine Science and Engineering natural gas hydrate fracture-filling hydrates pore-filling hydrates numerical simulation depressurization heat injection |
| title | Production Behavior of Hydrate-Bearing Sediments with Mixed Fracture- and Pore-Filling Hydrates |
| title_full | Production Behavior of Hydrate-Bearing Sediments with Mixed Fracture- and Pore-Filling Hydrates |
| title_fullStr | Production Behavior of Hydrate-Bearing Sediments with Mixed Fracture- and Pore-Filling Hydrates |
| title_full_unstemmed | Production Behavior of Hydrate-Bearing Sediments with Mixed Fracture- and Pore-Filling Hydrates |
| title_short | Production Behavior of Hydrate-Bearing Sediments with Mixed Fracture- and Pore-Filling Hydrates |
| title_sort | production behavior of hydrate bearing sediments with mixed fracture and pore filling hydrates |
| topic | natural gas hydrate fracture-filling hydrates pore-filling hydrates numerical simulation depressurization heat injection |
| url | https://www.mdpi.com/2077-1312/11/7/1321 |
| work_keys_str_mv | AT yaobinli productionbehaviorofhydratebearingsedimentswithmixedfractureandporefillinghydrates AT xinxin productionbehaviorofhydratebearingsedimentswithmixedfractureandporefillinghydrates AT tianfuxu productionbehaviorofhydratebearingsedimentswithmixedfractureandporefillinghydrates AT yingqizang productionbehaviorofhydratebearingsedimentswithmixedfractureandporefillinghydrates AT zimengyu productionbehaviorofhydratebearingsedimentswithmixedfractureandporefillinghydrates AT huixingzhu productionbehaviorofhydratebearingsedimentswithmixedfractureandporefillinghydrates AT yilongyuan productionbehaviorofhydratebearingsedimentswithmixedfractureandporefillinghydrates |