Fault Sealing Evaluation of a Strike-Slip Fault Based on Normal Stress: A Case Study from Eastern Junggar Basin, NW China
The sealing of a fault zone has been a focus for geological studies in the past decades. The majority of previous studies have focused on the extensional regimes, where the displacement pressure difference between fault rock and reservoir was used to evaluate the fault-sealing property from the basi...
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| Format: | Article |
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MDPI AG
2021-03-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/14/5/1468 |
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| author | Jie Ji Kongyou Wu Yangwen Pei Wenjian Guo Yin Liu Tianran Li |
| author_facet | Jie Ji Kongyou Wu Yangwen Pei Wenjian Guo Yin Liu Tianran Li |
| author_sort | Jie Ji |
| collection | DOAJ |
| description | The sealing of a fault zone has been a focus for geological studies in the past decades. The majority of previous studies have focused on the extensional regimes, where the displacement pressure difference between fault rock and reservoir was used to evaluate the fault-sealing property from the basic principle of fault sealing. When considering the displacement pressure difference, the impact of gravity on the fault rock was considered, whereas the impact of horizontal stress was ignored. In this study, we utilize the displacement pressure difference as an index to evaluate the sealing capacity of strike-slip faults, in which both the impacts of gravity and horizontal stress on the fault rocks are all integrated. By calculating the values of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>σ</mi><mi>H</mi></msub></mrow></semantics></math></inline-formula>/<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>σ</mi><mi>V</mi></msub></mrow></semantics></math></inline-formula> and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>σ</mi><mi>h</mi></msub></mrow></semantics></math></inline-formula>/<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>σ</mi><mi>V</mi></msub></mrow></semantics></math></inline-formula> in the vicinity of fault planes, the coefficient K of compaction impacts on fault rocks between normal stress to fault planes and gravity was then determined. By revealing the quantitative relationship between the displacement pressure of rocks, burial depth and clay content, the displacement pressure difference between fault rocks and reservoirs were calculated. The results suggest that the sealing capacity of a strike-slip fault is not only related to the magnitude of normal stress to the fault plane, but also to the stress regime. The clay content is also an important factor controlling the sealing capacity of strike-slip faults. |
| first_indexed | 2024-03-09T05:01:01Z |
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| id | doaj.art-589639c1414d45b6a05edb28ad967527 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-09T05:01:01Z |
| publishDate | 2021-03-01 |
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| spelling | doaj.art-589639c1414d45b6a05edb28ad9675272023-12-03T13:00:06ZengMDPI AGEnergies1996-10732021-03-01145146810.3390/en14051468Fault Sealing Evaluation of a Strike-Slip Fault Based on Normal Stress: A Case Study from Eastern Junggar Basin, NW ChinaJie Ji0Kongyou Wu1Yangwen Pei2Wenjian Guo3Yin Liu4Tianran Li5School of Geosciences, China University of Petroleum, Qingdao 266580, ChinaSchool of Geosciences, China University of Petroleum, Qingdao 266580, ChinaSchool of Geosciences, China University of Petroleum, Qingdao 266580, ChinaResearch Institute of Exploration and Development, Xinjiang Oilfield Company, PetroChina, Karamay 834000, ChinaSchool of Geosciences, China University of Petroleum, Qingdao 266580, ChinaSchool of Geosciences, China University of Petroleum, Qingdao 266580, ChinaThe sealing of a fault zone has been a focus for geological studies in the past decades. The majority of previous studies have focused on the extensional regimes, where the displacement pressure difference between fault rock and reservoir was used to evaluate the fault-sealing property from the basic principle of fault sealing. When considering the displacement pressure difference, the impact of gravity on the fault rock was considered, whereas the impact of horizontal stress was ignored. In this study, we utilize the displacement pressure difference as an index to evaluate the sealing capacity of strike-slip faults, in which both the impacts of gravity and horizontal stress on the fault rocks are all integrated. By calculating the values of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>σ</mi><mi>H</mi></msub></mrow></semantics></math></inline-formula>/<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>σ</mi><mi>V</mi></msub></mrow></semantics></math></inline-formula> and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>σ</mi><mi>h</mi></msub></mrow></semantics></math></inline-formula>/<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>σ</mi><mi>V</mi></msub></mrow></semantics></math></inline-formula> in the vicinity of fault planes, the coefficient K of compaction impacts on fault rocks between normal stress to fault planes and gravity was then determined. By revealing the quantitative relationship between the displacement pressure of rocks, burial depth and clay content, the displacement pressure difference between fault rocks and reservoirs were calculated. The results suggest that the sealing capacity of a strike-slip fault is not only related to the magnitude of normal stress to the fault plane, but also to the stress regime. The clay content is also an important factor controlling the sealing capacity of strike-slip faults.https://www.mdpi.com/1996-1073/14/5/1468normal stress of fault planestrike slip faultsealing of faultsdisplacement pressurenumerical simulation of stress |
| spellingShingle | Jie Ji Kongyou Wu Yangwen Pei Wenjian Guo Yin Liu Tianran Li Fault Sealing Evaluation of a Strike-Slip Fault Based on Normal Stress: A Case Study from Eastern Junggar Basin, NW China Energies normal stress of fault plane strike slip fault sealing of faults displacement pressure numerical simulation of stress |
| title | Fault Sealing Evaluation of a Strike-Slip Fault Based on Normal Stress: A Case Study from Eastern Junggar Basin, NW China |
| title_full | Fault Sealing Evaluation of a Strike-Slip Fault Based on Normal Stress: A Case Study from Eastern Junggar Basin, NW China |
| title_fullStr | Fault Sealing Evaluation of a Strike-Slip Fault Based on Normal Stress: A Case Study from Eastern Junggar Basin, NW China |
| title_full_unstemmed | Fault Sealing Evaluation of a Strike-Slip Fault Based on Normal Stress: A Case Study from Eastern Junggar Basin, NW China |
| title_short | Fault Sealing Evaluation of a Strike-Slip Fault Based on Normal Stress: A Case Study from Eastern Junggar Basin, NW China |
| title_sort | fault sealing evaluation of a strike slip fault based on normal stress a case study from eastern junggar basin nw china |
| topic | normal stress of fault plane strike slip fault sealing of faults displacement pressure numerical simulation of stress |
| url | https://www.mdpi.com/1996-1073/14/5/1468 |
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