Lithologic Reservoirs ›› 2009, Vol. 21 ›› Issue (1): 40-45.doi: 10.3969/j.issn.1673-8926.2009.01.008

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Vertical distribution characteristics of reservoir and sedimentary system of Silurian in Tahe area

TAO Bie1,FU Heng 1,2   

  1. 1. College of Energy Resources, Chengdu University of Technology, Chengdu 610059, China; 2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, China
  • Online:2009-03-16 Published:2009-03-16

Abstract:

Based on the data of outcrop, thin section, seismic data, logging and previous research results, the structural setting in Tahe area is analyzed. The result shows that Tahe area was affected by tectonic movements such as late Caledonian, early Hercynian, late Hercynian and early Yanshan movement. The Silurian, which is absent in most areas of Tahe area, appears in southwestern Tahe area and was only reserved in Lower Silurian Kepingtage Fomation and Tata’ai’ertage Formation, developing tidal flat and continental shelf here. Based on the sedimentary system types, the characteristics of the favorable reservoir of Silurian in Tahe area are analyzed. It is considered that the vertical distribution of reservoir is controlled by tectonic movement and eustatic sea level change. The vertical distribution of reservoir is predicted. The favorable reservoirs converge in lower and upper Kepingtage Fomation and Tata’ai’ertage Formation.

Key words: provenance analysis, paleocurrent direction, heavy minerals, conglomerate constituent, Junggar Basin

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