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- Title
Geochemical characteristics and geological significance of solid bitumen in Tianjingshan Paleo-uplift, Northwest Sichuan.
- Authors
ZHOU Yueru; BAI Xiaoiiang; YANG Guang; ZHOU Gang; GUO Hongxi; SUN Haofei; LUO Xin; WANG Jing; DENG Sisi; NIE Jing
- Abstract
In order to explore the geochemical charactesistics, origin and geological significance of solid bitumen in Tianjingshan Paleo-uplift in Northwest Sichuan, 20 outcrop bitumen samples of Cambrian, Devonian and Permian in this area were collected, and the experimental analysis of solid bitumen group Composition, biomarkers and carbon isotope were carried out. Combined with tectonic evolution history, the dynamic evolution formation mechanism of bitumen in the study area was established. The results show that the solid bitumen in Tianjingshan Paleo-uplift was formed by the serious biodegradation of the paleo reservoir. The Cambrian and Devonian bitumen sourced from the source rock of the Qiongzhuri Formation, and the Permian bitumen sourced from the mixture of the Qiongzhuri Formation and the Permian source rocks. The outcrop bitumen of multilayer system proves that the Tianjingshan Paleo uplift experienced a large area of paleo-oil accumulation, and the favorable exploration target of paleo-oil reservoir in this block is the wing with good bitumen sealing and preservation conditions. This study provides guidance for the next exploration and development of Tianjingshan Structure in Northwest Sichuan, and also provides reference for the study of bitumen formation and oil and gas evolution in similar areas with complex tectonic evolution.
- Publication
Journal of Northeast Petroleum University, 2021, Vol 45, Issue 5, p82
- ISSN
2095-4107
- Publication type
Article
- DOI
10.3969/j.issn.2095-4107.2021.05.009