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- Publisher Website: 10.1016/j.jseaes.2022.105490
- Scopus: eid_2-s2.0-85145556262
- WOS: WOS:000898157000001
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Article: First discovery of biodegraded petroleum in the South Qilian Basin, Northwest China: Implications for the origin of gas hydrates
| Title | First discovery of biodegraded petroleum in the South Qilian Basin, Northwest China: Implications for the origin of gas hydrates |
|---|---|
| Authors | |
| Keywords | Biodegradation Gas hydrate Hydrocarbon Petroleum The South Qilian basin |
| Issue Date | 25-Feb-2023 |
| Publisher | Academic Journals, New York |
| Citation | Asian Journal of Earth Sciences, 2023, v. 242 How to Cite? |
| Abstract | Biodegradation can greatly affect the physical properties of petroleum and cause difficulty in assessing its origin and maturity. Gas hydrates and petroleum have been discovered in the South Qilian basin, Northwest China, but biodegradation of petroleum has not been recognized. In this contribution, we present new geochemical evidence for biodegradation in light hydrocarbons (C5-C8), long-chain hydrocarbons from siltstones, oil shales and mudstones collected from boreholes that penetrated the Lower Jurassic strata in the South Qilian basin. The results show that with increasing depth the contents of n-alkanes in light hydrocarbons and long-chain hydrocarbons decrease, while the relative concentration of cyclo-alkanes, iso-alkanes and aromatic hydrocarbons from light hydrocarbon increase. Furthermore, natural gases, light hydrocarbons and long-chain hydrocarbons have undergone slight to moderate biodegradation near the surface (with depth of 0–150 m) of the Muli Depression. Therefore, for the first time, this study documented biodegraded petroleum in the Jurassic strata in the South Qilian basin, which provides important information for further determining the origin of petroleum and gas hydrates in the region. |
| Persistent Identifier | http://hdl.handle.net/10722/331760 |
| ISSN | 2019 SCImago Journal Rankings: 0.110 |
| ISI Accession Number ID |
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | Tan, Furong | - |
| dc.contributor.author | Li, Yang | - |
| dc.contributor.author | Han, Yigui | - |
| dc.contributor.author | Zhao, Guochun | - |
| dc.contributor.author | Liu, Shiming | - |
| dc.contributor.author | Du, Fangpeng | - |
| dc.contributor.author | Xie, Zhiqing | - |
| dc.contributor.author | Lu, Ping | - |
| dc.date.accessioned | 2023-09-21T06:58:41Z | - |
| dc.date.available | 2023-09-21T06:58:41Z | - |
| dc.date.issued | 2023-02-25 | - |
| dc.identifier.citation | Asian Journal of Earth Sciences, 2023, v. 242 | - |
| dc.identifier.issn | 1819-1886 | - |
| dc.identifier.uri | http://hdl.handle.net/10722/331760 | - |
| dc.description.abstract | <p>Biodegradation can greatly affect the physical properties of petroleum and cause difficulty in assessing its origin and maturity. <a href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/gas-hydrate" title="Learn more about Gas hydrates from ScienceDirect's AI-generated Topic Pages">Gas hydrates</a> and petroleum have been discovered in the South Qilian basin, Northwest China, but biodegradation of petroleum has not been recognized. In this contribution, we present new geochemical evidence for biodegradation in light hydrocarbons (C<sub>5</sub>-C<sub>8</sub>), long-chain hydrocarbons from <a href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/siltstone" title="Learn more about siltstones from ScienceDirect's AI-generated Topic Pages">siltstones</a>, <a href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/oil-shale" title="Learn more about oil shales from ScienceDirect's AI-generated Topic Pages">oil shales</a> and <a href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/mudstone" title="Learn more about mudstones from ScienceDirect's AI-generated Topic Pages">mudstones</a> collected from boreholes that penetrated the Lower Jurassic strata in the South Qilian basin. The results show that with increasing depth the contents of n-alkanes in light hydrocarbons and long-chain hydrocarbons decrease, while the relative concentration of cyclo-alkanes, iso-alkanes and <a href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/aromatic-hydrocarbon" title="Learn more about aromatic hydrocarbons from ScienceDirect's AI-generated Topic Pages">aromatic hydrocarbons</a> from light hydrocarbon increase. Furthermore, natural gases, light hydrocarbons and long-chain hydrocarbons have undergone slight to moderate biodegradation near the surface (with depth of 0–150 m) of the Muli Depression. Therefore, for the first time, this study documented biodegraded petroleum in the Jurassic strata in the South Qilian basin, which provides important information for further determining the origin of petroleum and gas hydrates in the region.</p> | - |
| dc.language | eng | - |
| dc.publisher | Academic Journals, New York | - |
| dc.relation.ispartof | Asian Journal of Earth Sciences | - |
| dc.subject | Biodegradation | - |
| dc.subject | Gas hydrate | - |
| dc.subject | Hydrocarbon | - |
| dc.subject | Petroleum | - |
| dc.subject | The South Qilian basin | - |
| dc.title | First discovery of biodegraded petroleum in the South Qilian Basin, Northwest China: Implications for the origin of gas hydrates | - |
| dc.type | Article | - |
| dc.identifier.doi | 10.1016/j.jseaes.2022.105490 | - |
| dc.identifier.scopus | eid_2-s2.0-85145556262 | - |
| dc.identifier.volume | 242 | - |
| dc.identifier.eissn | 2152-3509 | - |
| dc.identifier.isi | WOS:000898157000001 | - |
| dc.identifier.issnl | 1819-1886 | - |