Inorganic geochemical characteristics and evaluation of Sinian-Cambrian post-mature source rocks in Sichuan Basin
The evaluation of post-mature source rocks gradually invalidates by traditional organic geochemical parameters due to the decreasing of organic matter abundance. However, the inorganic elements in source rocks are not easily affected by thermal evolution. In order to explore the application of inorg...
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| Format: | Article |
| Language: | zho |
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Editorial Office of Petroleum Geology and Experiment
2022-05-01
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| Series: | Shiyou shiyan dizhi |
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| Online Access: | https://www.sysydz.net/cn/article/doi/10.11781/sysydz202203505 |
| _version_ | 1797277289638002688 |
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| author | Chunhua SHI Shujiao SHAN Jing HAO Bing LUO Jian CAO |
| author_facet | Chunhua SHI Shujiao SHAN Jing HAO Bing LUO Jian CAO |
| author_sort | Chunhua SHI |
| collection | DOAJ |
| description | The evaluation of post-mature source rocks gradually invalidates by traditional organic geochemical parameters due to the decreasing of organic matter abundance. However, the inorganic elements in source rocks are not easily affected by thermal evolution. In order to explore the application of inorganic geochemical methods in the evaluation of post-mature source rocks, this paper takes the Sinian-Cambrian source rocks in the Sichuan Basin as an example to conduct an evaluation based on the inorganic (major, trace and rare earth elements) geochemistry method with three controlling factors of source rock development (paleoproductivity, sedimentary environment and sedimentary rate). The concentration of Ba and Ni, MoEF and UEF and Ce anomaly, and TiO2/Al2O3 ratio could be correlated with paleoproducitvity, sedimentary environment and sedimentary rate, respectively. The results showed that the enrichment of organic matter was mainly controlled by sedimentary environment and paleoproductivity, but are barely effected by sedimentary rate. Source rocks in the Lower Cambrian Qiongzhusi Formation in the central Sichuan and Weiyuan-Ziyang areas have high paleoproductivity and the most reduced environment and thus are one of the best quality source rocks. Therefore, inorganic geochemistry method is an effective way to evaluate postmature source rocks. |
| first_indexed | 2024-03-07T15:45:34Z |
| format | Article |
| id | doaj.art-774337e2edf4423b8be967196d31e49b |
| institution | Directory Open Access Journal |
| issn | 1001-6112 |
| language | zho |
| last_indexed | 2024-03-07T15:45:34Z |
| publishDate | 2022-05-01 |
| publisher | Editorial Office of Petroleum Geology and Experiment |
| record_format | Article |
| series | Shiyou shiyan dizhi |
| spelling | doaj.art-774337e2edf4423b8be967196d31e49b2024-03-05T04:31:16ZzhoEditorial Office of Petroleum Geology and ExperimentShiyou shiyan dizhi1001-61122022-05-0144350551410.11781/sysydz202203505sysydz-44-3-505Inorganic geochemical characteristics and evaluation of Sinian-Cambrian post-mature source rocks in Sichuan BasinChunhua SHI0Shujiao SHAN1Jing HAO2Bing LUO3Jian CAO4College of Resources and Environmental Engineering, Guizhou University, Guiyang, Guizhou 550025, ChinaExploration and Development Research Institute, PetroChina Southwest Oil and Gas Field Company, Chengdu, Sichuan 610041, ChinaChongqing Gas Mine, PetroChina Southwest Oil and Gas Field Company, Chongqing 401120, ChinaChongqing Gas Mine, PetroChina Southwest Oil and Gas Field Company, Chongqing 401120, ChinaSchool of Earth Sciences and Engineering, Nanjing University, Nanjing, Jiangsu 210023, ChinaThe evaluation of post-mature source rocks gradually invalidates by traditional organic geochemical parameters due to the decreasing of organic matter abundance. However, the inorganic elements in source rocks are not easily affected by thermal evolution. In order to explore the application of inorganic geochemical methods in the evaluation of post-mature source rocks, this paper takes the Sinian-Cambrian source rocks in the Sichuan Basin as an example to conduct an evaluation based on the inorganic (major, trace and rare earth elements) geochemistry method with three controlling factors of source rock development (paleoproductivity, sedimentary environment and sedimentary rate). The concentration of Ba and Ni, MoEF and UEF and Ce anomaly, and TiO2/Al2O3 ratio could be correlated with paleoproducitvity, sedimentary environment and sedimentary rate, respectively. The results showed that the enrichment of organic matter was mainly controlled by sedimentary environment and paleoproductivity, but are barely effected by sedimentary rate. Source rocks in the Lower Cambrian Qiongzhusi Formation in the central Sichuan and Weiyuan-Ziyang areas have high paleoproductivity and the most reduced environment and thus are one of the best quality source rocks. Therefore, inorganic geochemistry method is an effective way to evaluate postmature source rocks.https://www.sysydz.net/cn/article/doi/10.11781/sysydz202203505post-mature source rockinorganic geochemistryhydrocarbon generation capacitysource rock evaluationsiniancambriansichuan basin |
| spellingShingle | Chunhua SHI Shujiao SHAN Jing HAO Bing LUO Jian CAO Inorganic geochemical characteristics and evaluation of Sinian-Cambrian post-mature source rocks in Sichuan Basin Shiyou shiyan dizhi post-mature source rock inorganic geochemistry hydrocarbon generation capacity source rock evaluation sinian cambrian sichuan basin |
| title | Inorganic geochemical characteristics and evaluation of Sinian-Cambrian post-mature source rocks in Sichuan Basin |
| title_full | Inorganic geochemical characteristics and evaluation of Sinian-Cambrian post-mature source rocks in Sichuan Basin |
| title_fullStr | Inorganic geochemical characteristics and evaluation of Sinian-Cambrian post-mature source rocks in Sichuan Basin |
| title_full_unstemmed | Inorganic geochemical characteristics and evaluation of Sinian-Cambrian post-mature source rocks in Sichuan Basin |
| title_short | Inorganic geochemical characteristics and evaluation of Sinian-Cambrian post-mature source rocks in Sichuan Basin |
| title_sort | inorganic geochemical characteristics and evaluation of sinian cambrian post mature source rocks in sichuan basin |
| topic | post-mature source rock inorganic geochemistry hydrocarbon generation capacity source rock evaluation sinian cambrian sichuan basin |
| url | https://www.sysydz.net/cn/article/doi/10.11781/sysydz202203505 |
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