Critical dynamic conditions for gas migration in tight sandstone
Physical simulation serves as a crucial method for understanding the mechanisms of underground oil and gas migration and accumulation. To gain a deeper understanding of gas migration mechanisms in tight reservoirs under deep geological conditions, experimental models and boundary conditions were des...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Petroleum Geology and Experiment
2024-05-01
|
| Series: | Shiyou shiyan dizhi |
| Subjects: | |
| Online Access: | https://www.sysydz.net/cn/article/doi/10.11781/sysydz202403532 |
| _version_ | 1827226167653957632 |
|---|---|
| author | Ruogu WANG Xiangyang QIAO Jinsong ZHOU Yuhong LEI Jun CAO Xiao YIN Bolun ZHUGENG |
| author_facet | Ruogu WANG Xiangyang QIAO Jinsong ZHOU Yuhong LEI Jun CAO Xiao YIN Bolun ZHUGENG |
| author_sort | Ruogu WANG |
| collection | DOAJ |
| description | Physical simulation serves as a crucial method for understanding the mechanisms of underground oil and gas migration and accumulation. To gain a deeper understanding of gas migration mechanisms in tight reservoirs under deep geological conditions, experimental models and boundary conditions were designed using the tight sandstone gas reservoirs of the Upper Paleozoic Shanxi Formation in the Yan'an Gas Field as a case study. Based on ultra-low permeability rock multiphase flow nuclear magnetic resonance online simulation experiments, the study investigated the critical pressure and dynamic conditions governing gas migration in tight sandstone, while also analyzing the factors influencing gas migration and accumulation. Different types of sandstones from the Shanxi Formation were selected, including quartz clean sandstone, quartz-rich low-plasticity particle detrital quartz sandstone, plastic particle-rich detrital sandstone, and tuffaceous matrix-rich quartz sandstone samples, representing reservoir rock facies with different porosity and permeability distributions. Experiments with constant low injection flow rates, different flow velocities (flow rates), and different pressure differences were conducted. The findings indicate that the critical charging pressure of tight sandstone reservoirs is primarily influenced by rock facies and permeability. Dominant rock facies with higher permeability exhibit lower critical charging pressures. For instance, the critical injection pressure of pure quartz sandstone gas typically falls below 1.2 MPa, while it generally remains below 1.5 MPa even for plastic-rich granular lithic sandstones and tuff-rich hybridquartz sandstones with inferior physical properties. Furthermore, there exists no absolute lower limit for the gas charging physical properties of tight sandstone. However, the charging efficiency and gas saturation of tight sandstone are positively correlated with reservoir physical properties, particularly permeability. The more developed the dominant rock facies and the higher the permeability, the higher the charging efficiency and gas saturation. |
| first_indexed | 2025-03-21T17:37:46Z |
| format | Article |
| id | doaj.art-b1147cfc0d9842f1bc47b7acdbc9406c |
| institution | Directory Open Access Journal |
| issn | 1001-6112 |
| language | zho |
| last_indexed | 2025-03-21T17:37:46Z |
| publishDate | 2024-05-01 |
| publisher | Editorial Office of Petroleum Geology and Experiment |
| record_format | Article |
| series | Shiyou shiyan dizhi |
| spelling | doaj.art-b1147cfc0d9842f1bc47b7acdbc9406c2024-06-12T09:14:08ZzhoEditorial Office of Petroleum Geology and ExperimentShiyou shiyan dizhi1001-61122024-05-0146353254110.11781/sysydz202403532sysydz-46-3-532Critical dynamic conditions for gas migration in tight sandstoneRuogu WANG0Xiangyang QIAO1Jinsong ZHOU2Yuhong LEI3Jun CAO4Xiao YIN5Bolun ZHUGENG6Natural Gas Research Institute of Shaanxi Yanchang Petroleum (Group) Co., LTD., Xi'an, Shaanxi 710065, ChinaNatural Gas Research Institute of Shaanxi Yanchang Petroleum (Group) Co., LTD., Xi'an, Shaanxi 710065, ChinaNatural Gas Research Institute of Shaanxi Yanchang Petroleum (Group) Co., LTD., Xi'an, Shaanxi 710065, ChinaInstitute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaNatural Gas Research Institute of Shaanxi Yanchang Petroleum (Group) Co., LTD., Xi'an, Shaanxi 710065, ChinaNatural Gas Research Institute of Shaanxi Yanchang Petroleum (Group) Co., LTD., Xi'an, Shaanxi 710065, ChinaNatural Gas Research Institute of Shaanxi Yanchang Petroleum (Group) Co., LTD., Xi'an, Shaanxi 710065, ChinaPhysical simulation serves as a crucial method for understanding the mechanisms of underground oil and gas migration and accumulation. To gain a deeper understanding of gas migration mechanisms in tight reservoirs under deep geological conditions, experimental models and boundary conditions were designed using the tight sandstone gas reservoirs of the Upper Paleozoic Shanxi Formation in the Yan'an Gas Field as a case study. Based on ultra-low permeability rock multiphase flow nuclear magnetic resonance online simulation experiments, the study investigated the critical pressure and dynamic conditions governing gas migration in tight sandstone, while also analyzing the factors influencing gas migration and accumulation. Different types of sandstones from the Shanxi Formation were selected, including quartz clean sandstone, quartz-rich low-plasticity particle detrital quartz sandstone, plastic particle-rich detrital sandstone, and tuffaceous matrix-rich quartz sandstone samples, representing reservoir rock facies with different porosity and permeability distributions. Experiments with constant low injection flow rates, different flow velocities (flow rates), and different pressure differences were conducted. The findings indicate that the critical charging pressure of tight sandstone reservoirs is primarily influenced by rock facies and permeability. Dominant rock facies with higher permeability exhibit lower critical charging pressures. For instance, the critical injection pressure of pure quartz sandstone gas typically falls below 1.2 MPa, while it generally remains below 1.5 MPa even for plastic-rich granular lithic sandstones and tuff-rich hybridquartz sandstones with inferior physical properties. Furthermore, there exists no absolute lower limit for the gas charging physical properties of tight sandstone. However, the charging efficiency and gas saturation of tight sandstone are positively correlated with reservoir physical properties, particularly permeability. The more developed the dominant rock facies and the higher the permeability, the higher the charging efficiency and gas saturation.https://www.sysydz.net/cn/article/doi/10.11781/sysydz202403532rock faciesdisplacement experimentcharging pressuredynamic conditionnatural gas migrationtight sandstone gas |
| spellingShingle | Ruogu WANG Xiangyang QIAO Jinsong ZHOU Yuhong LEI Jun CAO Xiao YIN Bolun ZHUGENG Critical dynamic conditions for gas migration in tight sandstone Shiyou shiyan dizhi rock facies displacement experiment charging pressure dynamic condition natural gas migration tight sandstone gas |
| title | Critical dynamic conditions for gas migration in tight sandstone |
| title_full | Critical dynamic conditions for gas migration in tight sandstone |
| title_fullStr | Critical dynamic conditions for gas migration in tight sandstone |
| title_full_unstemmed | Critical dynamic conditions for gas migration in tight sandstone |
| title_short | Critical dynamic conditions for gas migration in tight sandstone |
| title_sort | critical dynamic conditions for gas migration in tight sandstone |
| topic | rock facies displacement experiment charging pressure dynamic condition natural gas migration tight sandstone gas |
| url | https://www.sysydz.net/cn/article/doi/10.11781/sysydz202403532 |
| work_keys_str_mv | AT ruoguwang criticaldynamicconditionsforgasmigrationintightsandstone AT xiangyangqiao criticaldynamicconditionsforgasmigrationintightsandstone AT jinsongzhou criticaldynamicconditionsforgasmigrationintightsandstone AT yuhonglei criticaldynamicconditionsforgasmigrationintightsandstone AT juncao criticaldynamicconditionsforgasmigrationintightsandstone AT xiaoyin criticaldynamicconditionsforgasmigrationintightsandstone AT bolunzhugeng criticaldynamicconditionsforgasmigrationintightsandstone |