Low organic matter abundance and highly efficient hydrocarbon generation of saline source rock in the Qaidam Basin, NW China
The geochemical analysis and experimental simulation are comprehensively used to systematically study the hydrocarbon generation material, organic matter enrichment and hydrocarbon generation model of Paleogene source rock in the Western Qaidam Depression, Qaidam Basin, NW China. Three main factors...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2023-10-01
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| Series: | Petroleum Exploration and Development |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1876380423604471 |
| _version_ | 1797653932909002752 |
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| author | Guoxin LI Bin ZHANG Kunyu WU Songtao WU Xiaomei WANG Jing ZHANG Xuening QI Na ZHANG Haoting XING Chenggang XIAN He LIU |
| author_facet | Guoxin LI Bin ZHANG Kunyu WU Songtao WU Xiaomei WANG Jing ZHANG Xuening QI Na ZHANG Haoting XING Chenggang XIAN He LIU |
| author_sort | Guoxin LI |
| collection | DOAJ |
| description | The geochemical analysis and experimental simulation are comprehensively used to systematically study the hydrocarbon generation material, organic matter enrichment and hydrocarbon generation model of Paleogene source rock in the Western Qaidam Depression, Qaidam Basin, NW China. Three main factors result in low TOC values of saline lacustrine source rock of the Qaidam Basin: relatively poor nutrient supply inhibits the algal bloom, too fast deposition rate causes the dilution of organic matter, and high organic matter conversion efficiency causes the low residual organic carbon. For this type of hydrogen-rich organic matter, due to the reduction of organic carbon during hydrocarbon generation, TOC needs to be restored based on maturity before evaluating organic matter abundance. The hydrocarbon generation of saline lacustrine source rocks of the Qaidam Basin is from two parts: soluble organic matter and insoluble organic matter. The soluble organic matter is inherited from organisms and preserved in saline lacustrine basins. It generates hydrocarbons during low-maturity stage, and the formed hydrocarbons are rich in complex compounds such as NOS, and undergo secondary cracking to form light components in the later stage; the hydrocarbon generation model of insoluble organic matter conforms to the traditional “Tissot” model, with an oil generation peak corresponding to Ro of 1.0%. |
| first_indexed | 2024-03-11T16:52:02Z |
| format | Article |
| id | doaj.art-066aa8b141cc45ca8a24a2ae1e33e067 |
| institution | Directory Open Access Journal |
| issn | 1876-3804 |
| language | English |
| last_indexed | 2024-03-11T16:52:02Z |
| publishDate | 2023-10-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Petroleum Exploration and Development |
| spelling | doaj.art-066aa8b141cc45ca8a24a2ae1e33e0672023-10-21T04:22:23ZengKeAi Communications Co., Ltd.Petroleum Exploration and Development1876-38042023-10-0150510301044Low organic matter abundance and highly efficient hydrocarbon generation of saline source rock in the Qaidam Basin, NW ChinaGuoxin LI0Bin ZHANG1Kunyu WU2Songtao WU3Xiaomei WANG4Jing ZHANG5Xuening QI6Na ZHANG7Haoting XING8Chenggang XIAN9He LIU10State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China; China National Petroleum Corporation, Beijing 100007, ChinaResearch Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, China; Corresponding authorPetroChina Qinghai Oilfield Company, Dunhuang 736202, ChinaResearch Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, ChinaResearch Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, ChinaPetroChina Qinghai Oilfield Company, Dunhuang 736202, ChinaResearch Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, ChinaPetroChina Qinghai Oilfield Company, Dunhuang 736202, ChinaPetroChina Qinghai Oilfield Company, Dunhuang 736202, ChinaState Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, ChinaResearch Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, ChinaThe geochemical analysis and experimental simulation are comprehensively used to systematically study the hydrocarbon generation material, organic matter enrichment and hydrocarbon generation model of Paleogene source rock in the Western Qaidam Depression, Qaidam Basin, NW China. Three main factors result in low TOC values of saline lacustrine source rock of the Qaidam Basin: relatively poor nutrient supply inhibits the algal bloom, too fast deposition rate causes the dilution of organic matter, and high organic matter conversion efficiency causes the low residual organic carbon. For this type of hydrogen-rich organic matter, due to the reduction of organic carbon during hydrocarbon generation, TOC needs to be restored based on maturity before evaluating organic matter abundance. The hydrocarbon generation of saline lacustrine source rocks of the Qaidam Basin is from two parts: soluble organic matter and insoluble organic matter. The soluble organic matter is inherited from organisms and preserved in saline lacustrine basins. It generates hydrocarbons during low-maturity stage, and the formed hydrocarbons are rich in complex compounds such as NOS, and undergo secondary cracking to form light components in the later stage; the hydrocarbon generation model of insoluble organic matter conforms to the traditional “Tissot” model, with an oil generation peak corresponding to Ro of 1.0%.http://www.sciencedirect.com/science/article/pii/S1876380423604471Qaidam BasinQaidam Western DepressionPaleogene Lower Ganchaigou Formationsaline lakelow TOC valueshale oil |
| spellingShingle | Guoxin LI Bin ZHANG Kunyu WU Songtao WU Xiaomei WANG Jing ZHANG Xuening QI Na ZHANG Haoting XING Chenggang XIAN He LIU Low organic matter abundance and highly efficient hydrocarbon generation of saline source rock in the Qaidam Basin, NW China Petroleum Exploration and Development Qaidam Basin Qaidam Western Depression Paleogene Lower Ganchaigou Formation saline lake low TOC value shale oil |
| title | Low organic matter abundance and highly efficient hydrocarbon generation of saline source rock in the Qaidam Basin, NW China |
| title_full | Low organic matter abundance and highly efficient hydrocarbon generation of saline source rock in the Qaidam Basin, NW China |
| title_fullStr | Low organic matter abundance and highly efficient hydrocarbon generation of saline source rock in the Qaidam Basin, NW China |
| title_full_unstemmed | Low organic matter abundance and highly efficient hydrocarbon generation of saline source rock in the Qaidam Basin, NW China |
| title_short | Low organic matter abundance and highly efficient hydrocarbon generation of saline source rock in the Qaidam Basin, NW China |
| title_sort | low organic matter abundance and highly efficient hydrocarbon generation of saline source rock in the qaidam basin nw china |
| topic | Qaidam Basin Qaidam Western Depression Paleogene Lower Ganchaigou Formation saline lake low TOC value shale oil |
| url | http://www.sciencedirect.com/science/article/pii/S1876380423604471 |
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