Oil & Gas Geology ›› 2006, Vol. 27 ›› Issue (1): 62-69.doi: 10.11743/ogg20060111

Previous Articles     Next Articles

Cretaceous-Cenozoic regional tectonic evolution in Jiuquan basin and petroleum exploration

Pan Liangyun1,2, Xie Jielai2, Li Mingjie2, Zheng Menglin3   

  1. 1. College of Earth Sciences, China University of Geosciences, Wuhan, Hubei 430074, China;
    2. Geophysical Research Institute, BGP, Zhuozhou, Hebei 072751, China;
    3. Exploration & Production Research Institute, SINOPEC, Beijing 100083, China
  • Received:2005-12-16 Online:2006-02-25 Published:2012-01-16

Abstract:

Jiuquan basin, located on the western part of the northern edge of Qilian orogenic belt, is a petroliferous basin on the western end of the Corridor basin group. According to the changes of tectonic setting, formation and evolution of Qilian orogenic belt, stratigraphic distribution in the basin and characteristics of tectonic deformation, the Cretaceous-Cenozoic regional tectonic evolution in Jiuquan basin can be divided into 3 stages, i.e. the Early Cretaceous extensional rift-faulting stage, Late Cretaceous-Paleocene compressional uplifting stage, and Eocene-Oligocene downwarping and Neogene compressing stage. The Early Cretaceous extensional rift-faulting stage controlled the distribution of Lower Cretaceous source rocks and reservoir facies belts, and the salient areas would be favorable for the formation of buried-hill reservoirs. The Late Cretaceous-Paleocene com presso-uplifting led to the formation of reversed structural traps in the basin. The Eocene-Oligocene downwarping and Neogene compressing stage accelerated the maturation and evolution of the source rocks and led to the formation of many structural traps, it was also the major period for accumulation of hydrocarbons in the basin. The structural reservoirs in the piedmont thrust belt on the southern edge of the Cenozoic foreland basin and the structural-stratigraphic and lithologic reservoirs in the Early Cretaceous rifted basin would be the targets of further exploration in Jiuquan basin.

Key words: regional tectonic evolution, petroleum exploration, Cretaceous-Cenozoic, Jiuquan basin, Qilianshan orogenic belt

CLC Number: