Correlation between formation pressure and hydrocarbon enrichment in Triassic Xujiahe Formation, Western Sichuan Depression
The Upper Triassic Xujiahe Formation in the Xinchang structural belt of the Western Sichuan Depression is an important exploration target for tight sandstone hydrocarbon in the Sichuan Basin. Several studies are carried out in this paper to improve the effectiveness of exploration and development in...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Petroleum Geology and Experiment
2023-01-01
|
| Series: | Shiyou shiyan dizhi |
| Subjects: | |
| Online Access: | https://www.sysydz.net/cn/article/doi/10.11781/sysydz202301072 |
| _version_ | 1827329877171240960 |
|---|---|
| author | Zhengxin DUAN Yifeng LIU Zhanghua LOU Zhongqun LIU |
| author_facet | Zhengxin DUAN Yifeng LIU Zhanghua LOU Zhongqun LIU |
| author_sort | Zhengxin DUAN |
| collection | DOAJ |
| description | The Upper Triassic Xujiahe Formation in the Xinchang structural belt of the Western Sichuan Depression is an important exploration target for tight sandstone hydrocarbon in the Sichuan Basin. Several studies are carried out in this paper to improve the effectiveness of exploration and development including the characteristics of oil and gas movement with a view of dynamic point combining with fluid dynamics, determine the distribution characteristics of oil and gas in combination with static research results, and study the relationship between hydrocarbon enrichment and formation pressure. Overpressure is developed in the study area, and the degree of overpressure in the third member of Xujiahe Formation is the highest. Whilst the formation pressure of the main gas producing layer, the second member of Xujiahe Formation, is generally between 60-80 MPa with the maximum residual pressure reaches 40 MPa. The residual pressure gradients in most areas distribute between 0-3 MPa/km and up to 10 MPa/km as the highest. According to dynamic hydrocarbon enrichment theory and the relevant research on residual pressure and residual pressure gradient, it is considered that it has an important relationship with faults, fluids, hydrocarbon distribution and production performance. The area with higher residual pressure gradient (1-2 MPa/km) both improves fluid migration capacity and provides favorable reservoir, which is conducive to long-term high-yield and stable production. |
| first_indexed | 2024-03-07T15:47:30Z |
| format | Article |
| id | doaj.art-724e6982c85e48f68a2b981ecadb8f62 |
| institution | Directory Open Access Journal |
| issn | 1001-6112 |
| language | zho |
| last_indexed | 2024-03-07T15:47:30Z |
| publishDate | 2023-01-01 |
| publisher | Editorial Office of Petroleum Geology and Experiment |
| record_format | Article |
| series | Shiyou shiyan dizhi |
| spelling | doaj.art-724e6982c85e48f68a2b981ecadb8f622024-03-05T04:17:37ZzhoEditorial Office of Petroleum Geology and ExperimentShiyou shiyan dizhi1001-61122023-01-01451727910.11781/sysydz202301072sysydz-45-1-72Correlation between formation pressure and hydrocarbon enrichment in Triassic Xujiahe Formation, Western Sichuan DepressionZhengxin DUAN0Yifeng LIU1Zhanghua LOU2Zhongqun LIU3Ocean College, Zhejiang University, Zhoushan, Zhejiang 316000, ChinaOcean College, Zhejiang University, Zhoushan, Zhejiang 316000, ChinaOcean College, Zhejiang University, Zhoushan, Zhejiang 316000, ChinaPetroleum Exploration & Production Research Institute, SINOPEC, Beijing 100083, ChinaThe Upper Triassic Xujiahe Formation in the Xinchang structural belt of the Western Sichuan Depression is an important exploration target for tight sandstone hydrocarbon in the Sichuan Basin. Several studies are carried out in this paper to improve the effectiveness of exploration and development including the characteristics of oil and gas movement with a view of dynamic point combining with fluid dynamics, determine the distribution characteristics of oil and gas in combination with static research results, and study the relationship between hydrocarbon enrichment and formation pressure. Overpressure is developed in the study area, and the degree of overpressure in the third member of Xujiahe Formation is the highest. Whilst the formation pressure of the main gas producing layer, the second member of Xujiahe Formation, is generally between 60-80 MPa with the maximum residual pressure reaches 40 MPa. The residual pressure gradients in most areas distribute between 0-3 MPa/km and up to 10 MPa/km as the highest. According to dynamic hydrocarbon enrichment theory and the relevant research on residual pressure and residual pressure gradient, it is considered that it has an important relationship with faults, fluids, hydrocarbon distribution and production performance. The area with higher residual pressure gradient (1-2 MPa/km) both improves fluid migration capacity and provides favorable reservoir, which is conducive to long-term high-yield and stable production.https://www.sysydz.net/cn/article/doi/10.11781/sysydz202301072formation pressureresidual pressure gradienthydrocarbon distributionxujiahe formationwest sichuan depression |
| spellingShingle | Zhengxin DUAN Yifeng LIU Zhanghua LOU Zhongqun LIU Correlation between formation pressure and hydrocarbon enrichment in Triassic Xujiahe Formation, Western Sichuan Depression Shiyou shiyan dizhi formation pressure residual pressure gradient hydrocarbon distribution xujiahe formation west sichuan depression |
| title | Correlation between formation pressure and hydrocarbon enrichment in Triassic Xujiahe Formation, Western Sichuan Depression |
| title_full | Correlation between formation pressure and hydrocarbon enrichment in Triassic Xujiahe Formation, Western Sichuan Depression |
| title_fullStr | Correlation between formation pressure and hydrocarbon enrichment in Triassic Xujiahe Formation, Western Sichuan Depression |
| title_full_unstemmed | Correlation between formation pressure and hydrocarbon enrichment in Triassic Xujiahe Formation, Western Sichuan Depression |
| title_short | Correlation between formation pressure and hydrocarbon enrichment in Triassic Xujiahe Formation, Western Sichuan Depression |
| title_sort | correlation between formation pressure and hydrocarbon enrichment in triassic xujiahe formation western sichuan depression |
| topic | formation pressure residual pressure gradient hydrocarbon distribution xujiahe formation west sichuan depression |
| url | https://www.sysydz.net/cn/article/doi/10.11781/sysydz202301072 |
| work_keys_str_mv | AT zhengxinduan correlationbetweenformationpressureandhydrocarbonenrichmentintriassicxujiaheformationwesternsichuandepression AT yifengliu correlationbetweenformationpressureandhydrocarbonenrichmentintriassicxujiaheformationwesternsichuandepression AT zhanghualou correlationbetweenformationpressureandhydrocarbonenrichmentintriassicxujiaheformationwesternsichuandepression AT zhongqunliu correlationbetweenformationpressureandhydrocarbonenrichmentintriassicxujiaheformationwesternsichuandepression |