Tectonic and Sedimentary Evolution and Oil/Gas Potential in the Jan Mayen Ridge

Abstract

Abstract:

The Jan Mayen Ridge which is in the northeast of Iceland is located in the North Atlantic near the Arctic Circle, between Greenland plate and Norway plate. The Arctic region is vast with plentiful oil and gas resources, but the severe natural environment has limited the progress of oil and gas exploration. In the process of the sedimentary evolution of the Jan Mayen Ridge,the Jan Mayen Ridge has a similar sedimentary sequence to the East Greenland continental shelf and Norwegian continental shelf in Pre-Tertiary, and its tectonic evolution experienced three stages,i.e. a rift within the Permian, Triassic-Jurassic rift and micro-continent drift, and the Cretaceous thermal subsidence and passive margin. Through the analysis of previous researches and the oil and gas features of East Greenland continental shelf and Norwegian continental shelf the Jan Mayen Ridge can be divided into six tectonic units with two sets of oil and gas systems, i.e.the basin of the Jan Mayen, the west tectonic zone of the Jan Mayen, the central uplifted zone in the Jan Mayen, the Jan Mayen Trough, the eastern slopes of the Jan Mayen, the south complex tectonic belt of the Jan Mayen. At the same time, the tectonic evolution of the Jan Mayen Ridge formed extensional tectonic traps, horst fault block traps, structural traps and stratigraphic traps, and these traps provide a good environment for the accumulation of oil and gas, and also facilitate dividing the favorable exploration zones. This study provides a help for domestic and foreign research on the Jan Mayen Ridge, and has great significance to the research and exploitation of Arctic oil and gas resources.

Key words: the Jan Mayen Ridge, sedimentary evolution, tectonic unit, structural trap, favorable exploration zone

CLC Number:

CHENG Lin, YUAN Bingqiang, ZHANG Chunguan, XU Wenqiang, LU Haiou. Tectonic and Sedimentary Evolution and Oil/Gas Potential in the Jan Mayen Ridge[J]. Geoscience, 2017, 31(03): 450-459.

Figures/Tables 8

Fig.1 Location and structural division of the Jan Mayen Ridge

Fig.2 Generalized stratigraphy in the Jan Mayen Ridge

Fig.3 Rift/drift evolution of the Jan Mayen Ridge

Fig.4 Geological and structural framework map of the Jan Mayen Ridge

Fig.5 Deep seismic interpretation of the Jan Mayen Ridge

Table 1 Characteristics of marine source rocks in Norway Basin

时代	盆地	古地理环境	构造背景	厚度/m	有机质丰度/%	氢指数/(mg/g)	干酪根类型
晚侏罗世	More-Voring	局限海	裂谷期	60	3.14~6.15	455~563	Ⅱ-Ⅲ

Fig.6 Initial maturity model of source rocks

Fig.7 Hydrocarbon potential of the Jan Mayen Ridge

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