STRUCTURAL FEATURES OF THRUST NAPPES IN THE QIANGTANG BASIN AND HYDROCARBON RESOURCES EFFECT

JI Changjun; WU Zhenhan; LIU Zhiwei; ZHAO Zhen

doi:10.12090/j.issn.1006-6616.2019.25.S1.012

Volume 25 Issue S1

May 2019

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JI Changjun, WU Zhenhan, LIU Zhiwei, et al., 2019. STRUCTURAL FEATURES OF THRUST NAPPES IN THE QIANGTANG BASIN AND HYDROCARBON RESOURCES EFFECT. Journal of Geomechanics, 25 (S1): 66-71. DOI: 10.12090/j.issn.1006-6616.2019.25.S1.012

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STRUCTURAL FEATURES OF THRUST NAPPES IN THE QIANGTANG BASIN AND HYDROCARBON RESOURCES EFFECT

doi: 10.12090/j.issn.1006-6616.2019.25.S1.012

JI Changjun^{1, 2, 3
,},
WU Zhenhan⁴,
LIU Zhiwei⁴,
ZHAO Zhen⁴

1.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China
2.
Key Laboratory of Paleomagnetism and Tectonic Reconstruction, Ministry of Natural Resources, Beijing 100081, China
3.
Key Lab of Shale Oil and Gas Geological Survey, Chinese Academy of Geological Sciences, Beijing 100081, China
4.
Chinese Academy of Geological Sciences, Beijing 100037, China

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Published: 2019-05-01

Abstract

Abstract

As a good chance to understand the petroleum geological conditions of the basin, the paleo-oil reservoir in the south Qiangtang depression of the Qiangtang basin has been researched in detail for many years, and a large number of thrust nappe structures are revealed through detailed structural mapping, 2D seismic and geological shallow drilling. The paleo-oil reservoir is a large tectonic bed where the basin overthrust to the surface from north to south. It is mainly menifested in Mesozoic Marine strata overlying the late cretaceous-miocene lacustrine red beds, and the middle Jurassic oil-bearing dolomite is the main high quality reservoir of the paleo-oil reservoir. Analysis of the petroleum geological conditions of the paleo-oil reservoirs show that although thrust nappe structure destroys hanging wall anticline reservoirs, it makes stratum thickening, beneficial to the secondary hydrocarbon generation in effective source rocks and the effective shield and seal for the footwall flat. At the same time, it is conducive to the formation of high-quality dolomite reservoirs and structural traps, creating a good spatial-temporal matching relationship between generation, reservoir and cover for secondary accumulation, and contributing to the formation of thrust nappe type reservoirs.
- thrust nappe structure,
- paleo-oil reservoir,
- oil-bearing dolomite,
- Jurassic,
- Qiangtang basin,
- Tibetan plateau

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References(17)

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STRUCTURAL FEATURES OF THRUST NAPPES IN THE QIANGTANG BASIN AND HYDROCARBON RESOURCES EFFECT

doi: 10.12090/j.issn.1006-6616.2019.25.S1.012

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STRUCTURAL FEATURES OF THRUST NAPPES IN THE QIANGTANG BASIN AND HYDROCARBON RESOURCES EFFECT

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