Effects of Different Penetration Patterns on a Fault during Underground Fluid Injection
At underground fluid injection sites with natural faults, understanding how to avoid the subsequent fault reactivation and induced seismicity plays a crucial role in the success of subsurface anthropogenic activities. In this work, with the objective of avoiding risky faults in site selection in the...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2019/2027510 |
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| _version_ | 1832549284695769088 |
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| author | Xiaochen Wei Qi Li Xiaying Li Zhiyong Niu Xiangjun Liu Lixi Liang |
| author_facet | Xiaochen Wei Qi Li Xiaying Li Zhiyong Niu Xiangjun Liu Lixi Liang |
| author_sort | Xiaochen Wei |
| collection | DOAJ |
| description | At underground fluid injection sites with natural faults, understanding how to avoid the subsequent fault reactivation and induced seismicity plays a crucial role in the success of subsurface anthropogenic activities. In this work, with the objective of avoiding risky faults in site selection in the Shengli Oilfield, we investigated the faults that are usually encountered in the target demonstration zone; based on the geophysical observations of fault structures, we designed different fault tectonic scenarios to investigate the different penetration patterns of faults. We used the finite element-based numerical method to assess the influence of the effective lateral and vertical reservoir transmissivity in each fault penetration pattern. Our results indicate that when a permeable fault intersects into the target reservoir, it presents both barrier effect to reservoir transmissivity within the target reservoir and hydraulic connection between reservoirs. The effective lateral reservoir transmissivity is dominated by the barrier effect of the fault, and the effective vertical reservoir transmissivity is dominated by the hydraulic connection between reservoirs. Relatively impermeable faults with less contact with the target aquifer make higher effective lateral reservoir transmissivity and lower effective vertical reservoir transmissivity, which would mitigate the risk of caprock failure and the magnitude of the induced seismicity. |
| format | Article |
| id | doaj-art-0f37f1dd67a340e29ba47664c99537cc |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-0f37f1dd67a340e29ba47664c99537cc2025-02-03T06:11:38ZengWileyGeofluids1468-81151468-81232019-01-01201910.1155/2019/20275102027510Effects of Different Penetration Patterns on a Fault during Underground Fluid InjectionXiaochen Wei0Qi Li1Xiaying Li2Zhiyong Niu3Xiangjun Liu4Lixi Liang5School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, ChinaState Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, ChinaState Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, ChinaState Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, ChinaAt underground fluid injection sites with natural faults, understanding how to avoid the subsequent fault reactivation and induced seismicity plays a crucial role in the success of subsurface anthropogenic activities. In this work, with the objective of avoiding risky faults in site selection in the Shengli Oilfield, we investigated the faults that are usually encountered in the target demonstration zone; based on the geophysical observations of fault structures, we designed different fault tectonic scenarios to investigate the different penetration patterns of faults. We used the finite element-based numerical method to assess the influence of the effective lateral and vertical reservoir transmissivity in each fault penetration pattern. Our results indicate that when a permeable fault intersects into the target reservoir, it presents both barrier effect to reservoir transmissivity within the target reservoir and hydraulic connection between reservoirs. The effective lateral reservoir transmissivity is dominated by the barrier effect of the fault, and the effective vertical reservoir transmissivity is dominated by the hydraulic connection between reservoirs. Relatively impermeable faults with less contact with the target aquifer make higher effective lateral reservoir transmissivity and lower effective vertical reservoir transmissivity, which would mitigate the risk of caprock failure and the magnitude of the induced seismicity.http://dx.doi.org/10.1155/2019/2027510 |
| spellingShingle | Xiaochen Wei Qi Li Xiaying Li Zhiyong Niu Xiangjun Liu Lixi Liang Effects of Different Penetration Patterns on a Fault during Underground Fluid Injection Geofluids |
| title | Effects of Different Penetration Patterns on a Fault during Underground Fluid Injection |
| title_full | Effects of Different Penetration Patterns on a Fault during Underground Fluid Injection |
| title_fullStr | Effects of Different Penetration Patterns on a Fault during Underground Fluid Injection |
| title_full_unstemmed | Effects of Different Penetration Patterns on a Fault during Underground Fluid Injection |
| title_short | Effects of Different Penetration Patterns on a Fault during Underground Fluid Injection |
| title_sort | effects of different penetration patterns on a fault during underground fluid injection |
| url | http://dx.doi.org/10.1155/2019/2027510 |
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