Shale oil reservoir characteristics and exploration implication in Da'anzhai Member of Jurassic Ziliujing Formation in central Sichuan Basin
To further guide the exploration and development of shale oil in the Da'anzhai Member of the Jurassic Ziliujing Formation in the Sichuan Basin, it is urgent to clarify the favorable lithofacies of shale oil. In this study, core observation, thin section authentication, high pressure mercury inj...
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| Format: | Article |
| Language: | zho |
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Editorial Office of Petroleum Geology and Experiment
2024-01-01
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| Series: | Shiyou shiyan dizhi |
| Subjects: | |
| Online Access: | https://www.sysydz.net/cn/article/doi/10.11781/sysydz202401011 |
| _version_ | 1797279062550380544 |
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| author | Haitao HONG Jungang LU Chunyu QIN Shaomin ZHANG Rui ZHANG Yixin ZHOU Zhenglu XIAO Hongfei ZHOU Luyuan HAN |
| author_facet | Haitao HONG Jungang LU Chunyu QIN Shaomin ZHANG Rui ZHANG Yixin ZHOU Zhenglu XIAO Hongfei ZHOU Luyuan HAN |
| author_sort | Haitao HONG |
| collection | DOAJ |
| description | To further guide the exploration and development of shale oil in the Da'anzhai Member of the Jurassic Ziliujing Formation in the Sichuan Basin, it is urgent to clarify the favorable lithofacies of shale oil. In this study, core observation, thin section authentication, high pressure mercury injection, NMR, rock pyrolysis analysis and other experiments were used to analyze the reservoir space types, pore structure characteristics and oil-bearing properties of different lithofacies of shale series in the Da'anzhai Member. The results show that mainly six types of lithofacies are developed in the Da'anzhai Member: massive (argillaceous) shell limestone, layered argillaceous shell limestone, layered shell shale, laminar shell-bearing shale, massive shell-bearing clay shale and foliated siltstone-bearing clay shale. The physical properties of shale in the Da'anzhai Member are much better than those of shell limestone, and with the increase of calcareous content, the pore size of the shale gradually increases, but the total pore volume and total connected volume gradually decrease. The average free oil value (S1) of the shale series in the Da'anzhai Member is 1.31 mg/g, with moderate oil-bearing property. The S1 values of the foliated siltstone-bearing clay shale and the laminar shell-bearing shale are relatively higher, which are 2.37 mg/g and 1.82 mg/g, respectively. In summary, it is believed that the foliated siltstone-bearing clay shale and the laminar shell-bearing shale have good reservoir properties and high oil-bearing properties. The lithofacies combination of the two can be a key exploration target for shale oil in the Da'anzhai Member. |
| first_indexed | 2024-03-07T16:17:58Z |
| format | Article |
| id | doaj.art-85c33043b29b4582af09f15cc4f76c52 |
| institution | Directory Open Access Journal |
| issn | 1001-6112 |
| language | zho |
| last_indexed | 2024-03-07T16:17:58Z |
| publishDate | 2024-01-01 |
| publisher | Editorial Office of Petroleum Geology and Experiment |
| record_format | Article |
| series | Shiyou shiyan dizhi |
| spelling | doaj.art-85c33043b29b4582af09f15cc4f76c522024-03-04T08:32:59ZzhoEditorial Office of Petroleum Geology and ExperimentShiyou shiyan dizhi1001-61122024-01-01461112110.11781/sysydz202401011sysydz-46-1-11Shale oil reservoir characteristics and exploration implication in Da'anzhai Member of Jurassic Ziliujing Formation in central Sichuan BasinHaitao HONG0Jungang LU1Chunyu QIN2Shaomin ZHANG3Rui ZHANG4Yixin ZHOU5Zhenglu XIAO6Hongfei ZHOU7Luyuan HAN8Exploration and Development Research Institute, Southwest Oil & Gas Field Company, PetroChina, Chengdu, Sichuan 610051, ChinaNational Key Laboratory of Petroleum Geology and Development Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, ChinaExploration and Development Research Institute, Southwest Oil & Gas Field Company, PetroChina, Chengdu, Sichuan 610051, ChinaExploration and Development Research Institute, Southwest Oil & Gas Field Company, PetroChina, Chengdu, Sichuan 610051, ChinaExploration and Development Research Institute, Southwest Oil & Gas Field Company, PetroChina, Chengdu, Sichuan 610051, ChinaSchool of Earth Science and Technology, Southwest Petroleum University, Chengdu, Sichuan 610500, ChinaNational Key Laboratory of Petroleum Geology and Development Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, ChinaExploration and Development Research Institute, Southwest Oil & Gas Field Company, PetroChina, Chengdu, Sichuan 610051, ChinaExploration and Development Research Institute, Southwest Oil & Gas Field Company, PetroChina, Chengdu, Sichuan 610051, ChinaTo further guide the exploration and development of shale oil in the Da'anzhai Member of the Jurassic Ziliujing Formation in the Sichuan Basin, it is urgent to clarify the favorable lithofacies of shale oil. In this study, core observation, thin section authentication, high pressure mercury injection, NMR, rock pyrolysis analysis and other experiments were used to analyze the reservoir space types, pore structure characteristics and oil-bearing properties of different lithofacies of shale series in the Da'anzhai Member. The results show that mainly six types of lithofacies are developed in the Da'anzhai Member: massive (argillaceous) shell limestone, layered argillaceous shell limestone, layered shell shale, laminar shell-bearing shale, massive shell-bearing clay shale and foliated siltstone-bearing clay shale. The physical properties of shale in the Da'anzhai Member are much better than those of shell limestone, and with the increase of calcareous content, the pore size of the shale gradually increases, but the total pore volume and total connected volume gradually decrease. The average free oil value (S1) of the shale series in the Da'anzhai Member is 1.31 mg/g, with moderate oil-bearing property. The S1 values of the foliated siltstone-bearing clay shale and the laminar shell-bearing shale are relatively higher, which are 2.37 mg/g and 1.82 mg/g, respectively. In summary, it is believed that the foliated siltstone-bearing clay shale and the laminar shell-bearing shale have good reservoir properties and high oil-bearing properties. The lithofacies combination of the two can be a key exploration target for shale oil in the Da'anzhai Member.https://www.sysydz.net/cn/article/doi/10.11781/sysydz202401011reservoir spaceoil-bearing propertyshale oilreservoir characteristicsda'anzhai memberjurassicsichuan basin |
| spellingShingle | Haitao HONG Jungang LU Chunyu QIN Shaomin ZHANG Rui ZHANG Yixin ZHOU Zhenglu XIAO Hongfei ZHOU Luyuan HAN Shale oil reservoir characteristics and exploration implication in Da'anzhai Member of Jurassic Ziliujing Formation in central Sichuan Basin Shiyou shiyan dizhi reservoir space oil-bearing property shale oil reservoir characteristics da'anzhai member jurassic sichuan basin |
| title | Shale oil reservoir characteristics and exploration implication in Da'anzhai Member of Jurassic Ziliujing Formation in central Sichuan Basin |
| title_full | Shale oil reservoir characteristics and exploration implication in Da'anzhai Member of Jurassic Ziliujing Formation in central Sichuan Basin |
| title_fullStr | Shale oil reservoir characteristics and exploration implication in Da'anzhai Member of Jurassic Ziliujing Formation in central Sichuan Basin |
| title_full_unstemmed | Shale oil reservoir characteristics and exploration implication in Da'anzhai Member of Jurassic Ziliujing Formation in central Sichuan Basin |
| title_short | Shale oil reservoir characteristics and exploration implication in Da'anzhai Member of Jurassic Ziliujing Formation in central Sichuan Basin |
| title_sort | shale oil reservoir characteristics and exploration implication in da anzhai member of jurassic ziliujing formation in central sichuan basin |
| topic | reservoir space oil-bearing property shale oil reservoir characteristics da'anzhai member jurassic sichuan basin |
| url | https://www.sysydz.net/cn/article/doi/10.11781/sysydz202401011 |
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