Uncertainty Analysis of Biogas Generation and Gas Hydrate Accumulations in the Baiyun Sag, South China Sea
In this study, we use petroleum systems modeling (PSM) to quantitatively simulate the uncertainty of biogenic gas generation modes and their impact on the spatial distribution and resource assessment of gas hydrates in the Baiyun Sag, South China Sea. The results are as follows: (1) Biogenic gas gen...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-12-01
|
| Series: | Microorganisms |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-2607/13/1/5 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832587910101073920 |
|---|---|
| author | Pibo Su Jinqiang Liang Huai Cheng Yaoyao Lv Wei Zhang Zuofei Zhu |
| author_facet | Pibo Su Jinqiang Liang Huai Cheng Yaoyao Lv Wei Zhang Zuofei Zhu |
| author_sort | Pibo Su |
| collection | DOAJ |
| description | In this study, we use petroleum systems modeling (PSM) to quantitatively simulate the uncertainty of biogenic gas generation modes and their impact on the spatial distribution and resource assessment of gas hydrates in the Baiyun Sag, South China Sea. The results are as follows: (1) Biogenic gas generation is significantly affected by thermal state and organic matter type. Low temperature is a primary reason for gas hydrate occurrence in shallower sediments when sufficient methane gas is present. This may be due to higher thermal conductivity of the overlying sediments, slower sediment burial rates, or other geological processes. (2) Natural gas hydrate resources are significantly controlled by biogenic gas generation. In addition to the thermal conditions of the source rock or sediment, the nature of the organic matter is another crucial factor. Generally, low-temperature methanogens produce more methane gas because they require less energy, whereas high-temperature methanogens require more energy and thus produce less methane gas. (3) The biogas generation thermal model is key to controlling the location and quantity of natural gas hydrate resources. The three possible gas-phase models, K0, K1, and K2 (representing different methanogens), produce varying amounts of methane gas over time, resulting in different amounts of natural gas hydrate resources. Additionally, the preservation of various methanogens in biogas source rocks can alter reservoir formation locations, influencing the scale and genetic model of natural gas hydrate resources. |
| format | Article |
| id | doaj-art-2dc66b3a6d864df4906ae563efa11194 |
| institution | Kabale University |
| issn | 2076-2607 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Microorganisms |
| spelling | doaj-art-2dc66b3a6d864df4906ae563efa111942025-01-24T13:42:15ZengMDPI AGMicroorganisms2076-26072024-12-01131510.3390/microorganisms13010005Uncertainty Analysis of Biogas Generation and Gas Hydrate Accumulations in the Baiyun Sag, South China SeaPibo Su0Jinqiang Liang1Huai Cheng2Yaoyao Lv3Wei Zhang4Zuofei Zhu5Sanya Institute of South China Sea Geology, Guangzhou Marine Geological Survey, China Geological Survey, Sanya 572025, ChinaSanya Institute of South China Sea Geology, Guangzhou Marine Geological Survey, China Geological Survey, Sanya 572025, ChinaSanya Institute of South China Sea Geology, Guangzhou Marine Geological Survey, China Geological Survey, Sanya 572025, ChinaSanya Institute of South China Sea Geology, Guangzhou Marine Geological Survey, China Geological Survey, Sanya 572025, ChinaSanya Institute of South China Sea Geology, Guangzhou Marine Geological Survey, China Geological Survey, Sanya 572025, ChinaSanya Institute of South China Sea Geology, Guangzhou Marine Geological Survey, China Geological Survey, Sanya 572025, ChinaIn this study, we use petroleum systems modeling (PSM) to quantitatively simulate the uncertainty of biogenic gas generation modes and their impact on the spatial distribution and resource assessment of gas hydrates in the Baiyun Sag, South China Sea. The results are as follows: (1) Biogenic gas generation is significantly affected by thermal state and organic matter type. Low temperature is a primary reason for gas hydrate occurrence in shallower sediments when sufficient methane gas is present. This may be due to higher thermal conductivity of the overlying sediments, slower sediment burial rates, or other geological processes. (2) Natural gas hydrate resources are significantly controlled by biogenic gas generation. In addition to the thermal conditions of the source rock or sediment, the nature of the organic matter is another crucial factor. Generally, low-temperature methanogens produce more methane gas because they require less energy, whereas high-temperature methanogens require more energy and thus produce less methane gas. (3) The biogas generation thermal model is key to controlling the location and quantity of natural gas hydrate resources. The three possible gas-phase models, K0, K1, and K2 (representing different methanogens), produce varying amounts of methane gas over time, resulting in different amounts of natural gas hydrate resources. Additionally, the preservation of various methanogens in biogas source rocks can alter reservoir formation locations, influencing the scale and genetic model of natural gas hydrate resources.https://www.mdpi.com/2076-2607/13/1/5natural gas hydratebiogenic gasSouth China Seagas hydrate distributionresource estimation |
| spellingShingle | Pibo Su Jinqiang Liang Huai Cheng Yaoyao Lv Wei Zhang Zuofei Zhu Uncertainty Analysis of Biogas Generation and Gas Hydrate Accumulations in the Baiyun Sag, South China Sea Microorganisms natural gas hydrate biogenic gas South China Sea gas hydrate distribution resource estimation |
| title | Uncertainty Analysis of Biogas Generation and Gas Hydrate Accumulations in the Baiyun Sag, South China Sea |
| title_full | Uncertainty Analysis of Biogas Generation and Gas Hydrate Accumulations in the Baiyun Sag, South China Sea |
| title_fullStr | Uncertainty Analysis of Biogas Generation and Gas Hydrate Accumulations in the Baiyun Sag, South China Sea |
| title_full_unstemmed | Uncertainty Analysis of Biogas Generation and Gas Hydrate Accumulations in the Baiyun Sag, South China Sea |
| title_short | Uncertainty Analysis of Biogas Generation and Gas Hydrate Accumulations in the Baiyun Sag, South China Sea |
| title_sort | uncertainty analysis of biogas generation and gas hydrate accumulations in the baiyun sag south china sea |
| topic | natural gas hydrate biogenic gas South China Sea gas hydrate distribution resource estimation |
| url | https://www.mdpi.com/2076-2607/13/1/5 |
| work_keys_str_mv | AT pibosu uncertaintyanalysisofbiogasgenerationandgashydrateaccumulationsinthebaiyunsagsouthchinasea AT jinqiangliang uncertaintyanalysisofbiogasgenerationandgashydrateaccumulationsinthebaiyunsagsouthchinasea AT huaicheng uncertaintyanalysisofbiogasgenerationandgashydrateaccumulationsinthebaiyunsagsouthchinasea AT yaoyaolv uncertaintyanalysisofbiogasgenerationandgashydrateaccumulationsinthebaiyunsagsouthchinasea AT weizhang uncertaintyanalysisofbiogasgenerationandgashydrateaccumulationsinthebaiyunsagsouthchinasea AT zuofeizhu uncertaintyanalysisofbiogasgenerationandgashydrateaccumulationsinthebaiyunsagsouthchinasea |