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《Chinese Journal of Geology》 2005-04
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HISTORY OF HYDROCARBON-FILLING AND REMIGRATING IN HINTERLAND OF THE JUNGGAR BASIN

Zou Huayao1 Hao Fang1 Zhang Boqiao2 Chen Bin1(1. Faculty of Natural Resources and Technology Information, University of Petroleum, Beijing 102249; 2. Department of Petroleum, China University of Geosciences, Wuhan 430074)  
The Junggar Basin, as a typical superimposed one, experienced multiple phase tectonic activities from the Palaeozoic. The history of hydrocarbon-filling and migrating in the hinterland of the basin were reconstructed by hydrocarbon-generating modeling combined with reservoir geochemistry analyses. The study indicated that the hydrocarbon-filling process could be roughly divided into three episodes with varied maturity oil or/and gas which originated from different source layers. The early oil-filling occurred before Late Cretaceous and sourced from the Fengcheng Formation (the Lower Permian), the middle period of oil-filling was during Late Cretaceous and from the Xiawuerhe Formation (the Upper Permian), and the last period of gas-filling came about since the Paleogene and from the over-mature Fengcheng and Xiawuerhe Formations. A giant palaeohigh, called the Che-Mo Palaeohigh which created in the hinterland of the Junggar Basin during the Yanshanian orogeny (mainly in the end of Middle Jurassic), was tilted by the Himalayan tectonics. Simultaneously, a large amount of hydrocarbons (mostly oil) migrated again out of the tilting structure traps in the vicinity of the Che-Mo Palaeohigh, leaving behind some sporadically-distributed stratigraphic traps with partly-filled hydrocarbons.
【Fund】: 国家杰出青年科学基金项目(批准号:40125008)资助。
【CateGory Index】: P618.13;
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