Autor: |
Guoqi WEI, Wei YANG, Jinhu DU, Chunchun XU, Caineng ZOU, Wuren XIE, Saijun WU, Fuying ZENG |
Jazyk: |
English<br />Chinese |
Rok vydání: |
2015 |
Předmět: |
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Zdroj: |
Petroleum Exploration and Development, Vol 42, Iss 3, Pp 283-292 (2015) |
Druh dokumentu: |
article |
ISSN: |
1876-3804 |
DOI: |
10.1016/S1876-3804(15)30018-5 |
Popis: |
Based on the latest geological, seismic, drilling and outcrop data in the Sichuan Basin, the geological structure and evolution history of Gaoshiti-Moxi paleo-uplift was studied to find out controlling factors of the Sinian-Cambrian Anyue giant gas field. The Gaoshiti-Moxi paleo-uplift is an N-S trending syndepositional paleo-uplift related to the Tongwan movement. The top of Sinian Dengying Formation and adjacent strata in the central part of the paleo-uplift, namely the Gaoshiti-Moxi Area, has remained in the relatively high position since the Sinian, and a giant trap structure is developed independently in the area, which is different from Caledonian Leshan-Longnüsi paleo-uplift in development time, geological structure and evolution history. The Gaoshiti-Moxi paleo-uplift controls the development and distribution of the Sinian-Cambrian Anyue giant gas field, which is shown in the following aspects: (1) The western part of the paleo-uplift is adjacent to the source rock center of Cambrian Maidiping and Qiongzhusi Formations in Mianzhu-Changning intracratonic taphrogenic trough, and the source rocks of Sinian Dengying Formation and Cambrian Qiongzhusi Formation also occur in the Gaoshiti-Moxi paleo-uplift itself; (2) the paleo-uplift controls the formation and distribution of the high-quality reservoirs of the fourth and second members of Sinian Dengying Formation and Cambrian Longwangmiao Formation; and (3) there develop 3 sets of reservoir-seal assemblages which provide favorable conditions for the formation of the giant gas pool from in-situ cracking of paleo-oil reservoirs in the Sinian-Cambrian. Key words: Sichuan Basin, Gaoshiti-Moxi paleo-uplift, syndepositional paleo-uplift, tectonic feature, paleo-oil reservoir in-situ cracking |
Databáze: |
Directory of Open Access Journals |
Externí odkaz: |
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