Development characteristics and petroleum geological significance of Permian pyroclastic flow volcanic rocks in Western Sichuan Basin, SW China
By examining field outcrops, drilling cores and seismic data, it is concluded that the Middle and Late Permian “Emeishan basalts” in Western Sichuan Basin were developed in two large eruption cycles, and the two sets of igneous rocks are in unconformable contact. The lower cycle is dominated by over...
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| Format: | Article |
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KeAi Communications Co., Ltd.
2022-02-01
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| Series: | Petroleum Exploration and Development |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1876380422600053 |
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| author | Hao PENG Cheng YIN Qinglin HE Guoyong XIA Yong LIU Tinghu MA Kang CHEN Ran LIU Wang SU |
| author_facet | Hao PENG Cheng YIN Qinglin HE Guoyong XIA Yong LIU Tinghu MA Kang CHEN Ran LIU Wang SU |
| author_sort | Hao PENG |
| collection | DOAJ |
| description | By examining field outcrops, drilling cores and seismic data, it is concluded that the Middle and Late Permian “Emeishan basalts” in Western Sichuan Basin were developed in two large eruption cycles, and the two sets of igneous rocks are in unconformable contact. The lower cycle is dominated by overflow volcanic rocks; while the upper cycle made up of pyroclastic flow volcanic breccia and pyroclastic lava is typical explosive facies accumulation. With high-quality micro-dissolution pores and ultra-fine dissolution pores, the upper cycle is a set of high-quality porous reservoir. Based on strong heterogeneity and great differences of pyroclastic flow subfacies from surrounding rocks in lithology and physical properties, the volcanic facies and volcanic edifices in Western Sichuan were effectively predicted and characterized by using seismic attribute analysis method and instantaneous amplitude and instantaneous frequency coherence analysis. The pyroclastic flow volcanic rocks are widely distributed in the Jianyang area. Centering around wells YT1, TF2 and TF8, the volcanic rocks in Jianyang area had 3 edifice groups and an area of about 500 km2 which is the most favorable area for oil and gas exploration in volcanic rocks. |
| first_indexed | 2024-12-22T23:54:27Z |
| format | Article |
| id | doaj.art-4dc2c9a603f94bf88f6b3b7f0072d7da |
| institution | Directory Open Access Journal |
| issn | 1876-3804 |
| language | English |
| last_indexed | 2024-12-22T23:54:27Z |
| publishDate | 2022-02-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Petroleum Exploration and Development |
| spelling | doaj.art-4dc2c9a603f94bf88f6b3b7f0072d7da2022-12-21T18:08:00ZengKeAi Communications Co., Ltd.Petroleum Exploration and Development1876-38042022-02-014916477Development characteristics and petroleum geological significance of Permian pyroclastic flow volcanic rocks in Western Sichuan Basin, SW ChinaHao PENG0Cheng YIN1Qinglin HE2Guoyong XIA3Yong LIU4Tinghu MA5Kang CHEN6Ran LIU7Wang SU8Southwest Petroleum University, Chengdu 610500, China; Development Department of PetroChina Southwest Oil and Gas Field Company, Chengdu 610051, China; Corresponding authorSouthwest Petroleum University, Chengdu 610500, ChinaExploration and Development Research Institute of PetroChina Southwest Oil and Gas Field Company, Chengdu 610000, ChinaDevelopment Department of PetroChina Southwest Oil and Gas Field Company, Chengdu 610051, ChinaGas Field Development Management Department of PetroChina Southwest Oil and Gas Field Company, Chengdu 610000, ChinaDevelopment Department of PetroChina Southwest Oil and Gas Field Company, Chengdu 610051, ChinaExploration and Development Research Institute of PetroChina Southwest Oil and Gas Field Company, Chengdu 610000, ChinaExploration and Development Research Institute of PetroChina Southwest Oil and Gas Field Company, Chengdu 610000, ChinaResearch Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, ChinaBy examining field outcrops, drilling cores and seismic data, it is concluded that the Middle and Late Permian “Emeishan basalts” in Western Sichuan Basin were developed in two large eruption cycles, and the two sets of igneous rocks are in unconformable contact. The lower cycle is dominated by overflow volcanic rocks; while the upper cycle made up of pyroclastic flow volcanic breccia and pyroclastic lava is typical explosive facies accumulation. With high-quality micro-dissolution pores and ultra-fine dissolution pores, the upper cycle is a set of high-quality porous reservoir. Based on strong heterogeneity and great differences of pyroclastic flow subfacies from surrounding rocks in lithology and physical properties, the volcanic facies and volcanic edifices in Western Sichuan were effectively predicted and characterized by using seismic attribute analysis method and instantaneous amplitude and instantaneous frequency coherence analysis. The pyroclastic flow volcanic rocks are widely distributed in the Jianyang area. Centering around wells YT1, TF2 and TF8, the volcanic rocks in Jianyang area had 3 edifice groups and an area of about 500 km2 which is the most favorable area for oil and gas exploration in volcanic rocks.http://www.sciencedirect.com/science/article/pii/S1876380422600053Sichuan BasinPermianvolcanic rocksEmeishan basaltpyroclastic flowseismic attribute analysis |
| spellingShingle | Hao PENG Cheng YIN Qinglin HE Guoyong XIA Yong LIU Tinghu MA Kang CHEN Ran LIU Wang SU Development characteristics and petroleum geological significance of Permian pyroclastic flow volcanic rocks in Western Sichuan Basin, SW China Petroleum Exploration and Development Sichuan Basin Permian volcanic rocks Emeishan basalt pyroclastic flow seismic attribute analysis |
| title | Development characteristics and petroleum geological significance of Permian pyroclastic flow volcanic rocks in Western Sichuan Basin, SW China |
| title_full | Development characteristics and petroleum geological significance of Permian pyroclastic flow volcanic rocks in Western Sichuan Basin, SW China |
| title_fullStr | Development characteristics and petroleum geological significance of Permian pyroclastic flow volcanic rocks in Western Sichuan Basin, SW China |
| title_full_unstemmed | Development characteristics and petroleum geological significance of Permian pyroclastic flow volcanic rocks in Western Sichuan Basin, SW China |
| title_short | Development characteristics and petroleum geological significance of Permian pyroclastic flow volcanic rocks in Western Sichuan Basin, SW China |
| title_sort | development characteristics and petroleum geological significance of permian pyroclastic flow volcanic rocks in western sichuan basin sw china |
| topic | Sichuan Basin Permian volcanic rocks Emeishan basalt pyroclastic flow seismic attribute analysis |
| url | http://www.sciencedirect.com/science/article/pii/S1876380422600053 |
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