Oil-bearing potential and hydrocarbon occurrence characteristics of shale in Paleogene Hetaoyuan Formation in Biyang Sag, Nanxiang Basin
High-quality lacustrine shale beds within the Paleogene Hetaoyuan Formation in the Biyang Sag, Nanxiang Basin, exhibit significant potential for shale oil resources. Previous studies on the oil-bearing potential and hydrocarbon occurrence of shales in the Biyang Sag were relatively limited, potentia...
| Main Authors: | , , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Petroleum Geology and Experiment
2024-03-01
|
| Series: | Shiyou shiyan dizhi |
| Subjects: | |
| Online Access: | https://www.sysydz.net/cn/article/doi/10.11781/sysydz202402354 |
| _version_ | 1797234295118495744 |
|---|---|
| author | Yunyun JIN Chuxiong LI Yong WANG Yongxin YAN Xi LUO Shuaibo HUANG Zhiming LI Yuanyuan ZHOU Zhongliang SUN Yahui LIU Mengyao JIA Junying LENG |
| author_facet | Yunyun JIN Chuxiong LI Yong WANG Yongxin YAN Xi LUO Shuaibo HUANG Zhiming LI Yuanyuan ZHOU Zhongliang SUN Yahui LIU Mengyao JIA Junying LENG |
| author_sort | Yunyun JIN |
| collection | DOAJ |
| description | High-quality lacustrine shale beds within the Paleogene Hetaoyuan Formation in the Biyang Sag, Nanxiang Basin, exhibit significant potential for shale oil resources. Previous studies on the oil-bearing potential and hydrocarbon occurrence of shales in the Biyang Sag were relatively limited, potentially hindering advancements for shale oil exploration. This study focuses on the shales found in the third sub-member of the third member within the Hetaoyuan Formation in well Y1, which locates in the southern area of the Biyang Sag. Through various geochemical analyses such as Rock-Eval pyrolysis, multi-temperature pyrolysis and X-ray diffraction, this research systematically investigates the shale oil contents, hydrocarbon occurrence characteristics, and influencing factors. These results indicate that the lithofacies assemblages of the shale primarily consist of felsic shale facies, dolomitic shale facies and mixed shale facies, with a well-developed laminar structure. The source rock quality is classified as good to excellent, and the thermal maturity stage of oil window. The predominant organic maceral is sapropelic, with organic matter types ranging from Ⅰ to Ⅱ1. Oil content increases with burial depth, ranged from adsorbed hydrocarbons in the upper section to free hydrocarbons in the lower section. Detrital mineral content and total organic carbon (TOC) content are identified as the main factors influencing free and adsorbed hydrocarbon content, respectively. Overall, the oil saturation index (OSI) of the shale in the lower section of the Hetaoyuan Formation exceeds 100 mg/g, with an average free hydrocarbon content over 3 mg/g, indicating promising prospects for shale oil exploration and development. |
| first_indexed | 2024-04-24T16:29:47Z |
| format | Article |
| id | doaj.art-d6f537075bd54156b1aa1ee313ac254a |
| institution | Directory Open Access Journal |
| issn | 1001-6112 |
| language | zho |
| last_indexed | 2024-04-24T16:29:47Z |
| publishDate | 2024-03-01 |
| publisher | Editorial Office of Petroleum Geology and Experiment |
| record_format | Article |
| series | Shiyou shiyan dizhi |
| spelling | doaj.art-d6f537075bd54156b1aa1ee313ac254a2024-03-30T07:53:00ZzhoEditorial Office of Petroleum Geology and ExperimentShiyou shiyan dizhi1001-61122024-03-0146235436510.11781/sysydz202402354sysydz-46-2-354Oil-bearing potential and hydrocarbon occurrence characteristics of shale in Paleogene Hetaoyuan Formation in Biyang Sag, Nanxiang BasinYunyun JIN0Chuxiong LI1Yong WANG2Yongxin YAN3Xi LUO4Shuaibo HUANG5Zhiming LI6Yuanyuan ZHOU7Zhongliang SUN8Yahui LIU9Mengyao JIA10Junying LENG11Research Institute of Exploration and Development, Henan Oilfield Company, SINOPEC, Nanyang, Henan 473132, ChinaWuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214126, ChinaPetroleum Exploration Management Department, Henan Oilfield Company, SINOPEC, Nanyang, Henan 473132, ChinaPetroleum Exploration Management Department, Henan Oilfield Company, SINOPEC, Nanyang, Henan 473132, ChinaResearch Institute of Exploration and Development, Henan Oilfield Company, SINOPEC, Nanyang, Henan 473132, ChinaResearch Institute of Exploration and Development, Henan Oilfield Company, SINOPEC, Nanyang, Henan 473132, ChinaWuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214126, ChinaWuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214126, ChinaWuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214126, ChinaWuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214126, ChinaWuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214126, ChinaWuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214126, ChinaHigh-quality lacustrine shale beds within the Paleogene Hetaoyuan Formation in the Biyang Sag, Nanxiang Basin, exhibit significant potential for shale oil resources. Previous studies on the oil-bearing potential and hydrocarbon occurrence of shales in the Biyang Sag were relatively limited, potentially hindering advancements for shale oil exploration. This study focuses on the shales found in the third sub-member of the third member within the Hetaoyuan Formation in well Y1, which locates in the southern area of the Biyang Sag. Through various geochemical analyses such as Rock-Eval pyrolysis, multi-temperature pyrolysis and X-ray diffraction, this research systematically investigates the shale oil contents, hydrocarbon occurrence characteristics, and influencing factors. These results indicate that the lithofacies assemblages of the shale primarily consist of felsic shale facies, dolomitic shale facies and mixed shale facies, with a well-developed laminar structure. The source rock quality is classified as good to excellent, and the thermal maturity stage of oil window. The predominant organic maceral is sapropelic, with organic matter types ranging from Ⅰ to Ⅱ1. Oil content increases with burial depth, ranged from adsorbed hydrocarbons in the upper section to free hydrocarbons in the lower section. Detrital mineral content and total organic carbon (TOC) content are identified as the main factors influencing free and adsorbed hydrocarbon content, respectively. Overall, the oil saturation index (OSI) of the shale in the lower section of the Hetaoyuan Formation exceeds 100 mg/g, with an average free hydrocarbon content over 3 mg/g, indicating promising prospects for shale oil exploration and development.https://www.sysydz.net/cn/article/doi/10.11781/sysydz202402354shale oiloil-bearing potentialhydrocarbon occurrence statehetaoyuan formationpaleogenebiyang sagnanxiang basin |
| spellingShingle | Yunyun JIN Chuxiong LI Yong WANG Yongxin YAN Xi LUO Shuaibo HUANG Zhiming LI Yuanyuan ZHOU Zhongliang SUN Yahui LIU Mengyao JIA Junying LENG Oil-bearing potential and hydrocarbon occurrence characteristics of shale in Paleogene Hetaoyuan Formation in Biyang Sag, Nanxiang Basin Shiyou shiyan dizhi shale oil oil-bearing potential hydrocarbon occurrence state hetaoyuan formation paleogene biyang sag nanxiang basin |
| title | Oil-bearing potential and hydrocarbon occurrence characteristics of shale in Paleogene Hetaoyuan Formation in Biyang Sag, Nanxiang Basin |
| title_full | Oil-bearing potential and hydrocarbon occurrence characteristics of shale in Paleogene Hetaoyuan Formation in Biyang Sag, Nanxiang Basin |
| title_fullStr | Oil-bearing potential and hydrocarbon occurrence characteristics of shale in Paleogene Hetaoyuan Formation in Biyang Sag, Nanxiang Basin |
| title_full_unstemmed | Oil-bearing potential and hydrocarbon occurrence characteristics of shale in Paleogene Hetaoyuan Formation in Biyang Sag, Nanxiang Basin |
| title_short | Oil-bearing potential and hydrocarbon occurrence characteristics of shale in Paleogene Hetaoyuan Formation in Biyang Sag, Nanxiang Basin |
| title_sort | oil bearing potential and hydrocarbon occurrence characteristics of shale in paleogene hetaoyuan formation in biyang sag nanxiang basin |
| topic | shale oil oil-bearing potential hydrocarbon occurrence state hetaoyuan formation paleogene biyang sag nanxiang basin |
| url | https://www.sysydz.net/cn/article/doi/10.11781/sysydz202402354 |
| work_keys_str_mv | AT yunyunjin oilbearingpotentialandhydrocarbonoccurrencecharacteristicsofshaleinpaleogenehetaoyuanformationinbiyangsagnanxiangbasin AT chuxiongli oilbearingpotentialandhydrocarbonoccurrencecharacteristicsofshaleinpaleogenehetaoyuanformationinbiyangsagnanxiangbasin AT yongwang oilbearingpotentialandhydrocarbonoccurrencecharacteristicsofshaleinpaleogenehetaoyuanformationinbiyangsagnanxiangbasin AT yongxinyan oilbearingpotentialandhydrocarbonoccurrencecharacteristicsofshaleinpaleogenehetaoyuanformationinbiyangsagnanxiangbasin AT xiluo oilbearingpotentialandhydrocarbonoccurrencecharacteristicsofshaleinpaleogenehetaoyuanformationinbiyangsagnanxiangbasin AT shuaibohuang oilbearingpotentialandhydrocarbonoccurrencecharacteristicsofshaleinpaleogenehetaoyuanformationinbiyangsagnanxiangbasin AT zhimingli oilbearingpotentialandhydrocarbonoccurrencecharacteristicsofshaleinpaleogenehetaoyuanformationinbiyangsagnanxiangbasin AT yuanyuanzhou oilbearingpotentialandhydrocarbonoccurrencecharacteristicsofshaleinpaleogenehetaoyuanformationinbiyangsagnanxiangbasin AT zhongliangsun oilbearingpotentialandhydrocarbonoccurrencecharacteristicsofshaleinpaleogenehetaoyuanformationinbiyangsagnanxiangbasin AT yahuiliu oilbearingpotentialandhydrocarbonoccurrencecharacteristicsofshaleinpaleogenehetaoyuanformationinbiyangsagnanxiangbasin AT mengyaojia oilbearingpotentialandhydrocarbonoccurrencecharacteristicsofshaleinpaleogenehetaoyuanformationinbiyangsagnanxiangbasin AT junyingleng oilbearingpotentialandhydrocarbonoccurrencecharacteristicsofshaleinpaleogenehetaoyuanformationinbiyangsagnanxiangbasin |