Genetic Mechanism and Evolution of the Covert Fault Zone and Its Oil-Controlling Mode in Qikou Sag, Eastern China
Covert fault zone is an important type of geological phenomenon that is closely related to hydrocarbon formation and distribution but has often been overlooked because it lacks obvious fault displacement and fault plane. To meet this challenge, a novel cognitive framework is proposed in this study,...
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-12-01
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| Series: | Energies |
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| Online Access: | http://www.mdpi.com/1996-1073/12/1/98 |
| _version_ | 1817991704282660864 |
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| author | Shuai Jiang Weifeng Wang Aizhu Zhang Weiwei Zhou |
| author_facet | Shuai Jiang Weifeng Wang Aizhu Zhang Weiwei Zhou |
| author_sort | Shuai Jiang |
| collection | DOAJ |
| description | Covert fault zone is an important type of geological phenomenon that is closely related to hydrocarbon formation and distribution but has often been overlooked because it lacks obvious fault displacement and fault plane. To meet this challenge, a novel cognitive framework is proposed in this study, in which criteria for identifying the existence of covert fault zone are developed based on the regional tectonic backgrounds and geophysical data. The Riedel shear model is then utilized to analyze the genetic mechanism of the covert fault zone. The Mohr-Coulomb theory is also introduced to conduct a structural physical simulation to interpret the evolution process of the covert fault zone. Information about the genetic mechanism and evolution of the covert fault zone is finally combined to determine the oil-controlling mode. The study site is Qikou Sag in Eastern China. It is found that the covert fault zone in Qikou Sag meets four recognition criteria and is generated by the stress transferred from the strike-slip activity of the basement fault. Moreover, it can be concluded that the covert fault zone in Qikou Sag contains five evolution stages and controls the reservoir mainly via three aspects, that is, sedimentary sand, subtle traps and oil accumulation mode. |
| first_indexed | 2024-04-14T01:16:46Z |
| format | Article |
| id | doaj.art-5e76bb5d8a4f4daeaa2faf9ee5672a10 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-14T01:16:46Z |
| publishDate | 2018-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-5e76bb5d8a4f4daeaa2faf9ee5672a102022-12-22T02:20:50ZengMDPI AGEnergies1996-10732018-12-011219810.3390/en12010098en12010098Genetic Mechanism and Evolution of the Covert Fault Zone and Its Oil-Controlling Mode in Qikou Sag, Eastern ChinaShuai Jiang0Weifeng Wang1Aizhu Zhang2Weiwei Zhou3School of Geosciences, China University of Petroleum (East China), Qingdao, Shandong, 266580, ChinaSchool of Geosciences, China University of Petroleum (East China), Qingdao, Shandong, 266580, ChinaSchool of Geosciences, China University of Petroleum (East China), Qingdao, Shandong, 266580, ChinaSouth China Sea Institute of Oceanology Chinese Academy of Sciences, Guangzhou 510301, ChinaCovert fault zone is an important type of geological phenomenon that is closely related to hydrocarbon formation and distribution but has often been overlooked because it lacks obvious fault displacement and fault plane. To meet this challenge, a novel cognitive framework is proposed in this study, in which criteria for identifying the existence of covert fault zone are developed based on the regional tectonic backgrounds and geophysical data. The Riedel shear model is then utilized to analyze the genetic mechanism of the covert fault zone. The Mohr-Coulomb theory is also introduced to conduct a structural physical simulation to interpret the evolution process of the covert fault zone. Information about the genetic mechanism and evolution of the covert fault zone is finally combined to determine the oil-controlling mode. The study site is Qikou Sag in Eastern China. It is found that the covert fault zone in Qikou Sag meets four recognition criteria and is generated by the stress transferred from the strike-slip activity of the basement fault. Moreover, it can be concluded that the covert fault zone in Qikou Sag contains five evolution stages and controls the reservoir mainly via three aspects, that is, sedimentary sand, subtle traps and oil accumulation mode.http://www.mdpi.com/1996-1073/12/1/98covert fault zonegenetic mechanismQikou Sagstructure evolutionoil-controlling modeRiedel shearMohr–Coulomb theory |
| spellingShingle | Shuai Jiang Weifeng Wang Aizhu Zhang Weiwei Zhou Genetic Mechanism and Evolution of the Covert Fault Zone and Its Oil-Controlling Mode in Qikou Sag, Eastern China Energies covert fault zone genetic mechanism Qikou Sag structure evolution oil-controlling mode Riedel shear Mohr–Coulomb theory |
| title | Genetic Mechanism and Evolution of the Covert Fault Zone and Its Oil-Controlling Mode in Qikou Sag, Eastern China |
| title_full | Genetic Mechanism and Evolution of the Covert Fault Zone and Its Oil-Controlling Mode in Qikou Sag, Eastern China |
| title_fullStr | Genetic Mechanism and Evolution of the Covert Fault Zone and Its Oil-Controlling Mode in Qikou Sag, Eastern China |
| title_full_unstemmed | Genetic Mechanism and Evolution of the Covert Fault Zone and Its Oil-Controlling Mode in Qikou Sag, Eastern China |
| title_short | Genetic Mechanism and Evolution of the Covert Fault Zone and Its Oil-Controlling Mode in Qikou Sag, Eastern China |
| title_sort | genetic mechanism and evolution of the covert fault zone and its oil controlling mode in qikou sag eastern china |
| topic | covert fault zone genetic mechanism Qikou Sag structure evolution oil-controlling mode Riedel shear Mohr–Coulomb theory |
| url | http://www.mdpi.com/1996-1073/12/1/98 |
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