Welcome to visit Geoscience!

Geoscience ›› 2008, Vol. 22 ›› Issue (5): 766-778.

• Engineering Geology and Environmental Geology • Previous Articles     Next Articles

Time-spatial Developing Features of Co-existed Inherited and Neogenic Structures and Their Implications for Oil-gas Exploration

TUN Gen-Yao1,Liang-Xin2,XIE Zhou2   

  1. 1Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing100029, China; 2Zhejiang Oilfield Company, China National Petroleum Corporation, Hangzhou,Zhejiang310013, China
  • Received:2008-04-18 Revised:2008-08-29 Online:2008-10-20 Published:2009-11-12

Abstract:

China and neighbouring continent is a composite one, resulted from amalgamation of microcontinents and blocks by multiple orogenies. According to the orientations, the younger structures can be classified into two basic kinds: inherited and neogenic structures. There is a complicated spatial relation of the both, and the intensity of neogenic structure’s developing varies from place to place. For oil-gas exploration in the Cenozoic basins in East China, for example, the North Jiangsu and Bohai Bay basins where the NE structure was inherited one and the NEE structure was neogenic, the optimized targets might be neogenic structure superimposed the inherited ones. For the Mesozoic basins in middle-eastern China, such as the Erlian and Poyang basins, it should attend to, in addition to finding the neogenic structure superimposed the inherited ones, the oil-gas adjustment and later secondary reservation caused by occurring of the neogenic structure. The marine sedimentary basin was generally superimposed by continental basin, where multi-generation and multi-orientation neogenic structures developed and controlled the lithologic and structural oil-gas pools respectively. For example, there occurred two generations (NW- and NE-orientations respectively) of neogenic structures in the northeastern Sichuan Basin. To take structural study as the key link, to strengthen analyses on the neogenic structures, and to synthesize the works on source, migration and reservation, the theory of basin-orogeny coupling will guide concretely the oil-gas exploration practice.

Key words: inherited structure, neogenic structure, time-spatial developing, basin-orogeny coupling, oil-gas exploration

CLC Number: