Lithologic Reservoirs ›› 2010, Vol. 22 ›› Issue (2): 48-53.doi: 10.3969/j.issn.1673-8926.2010.02.009

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Sequence stratigraphy of Cambrian in Bachu—Tazhong area，Tarim Basin

LIU Yanting1， FU Heng 1，2， CHEN Ji1， FANG Xiaolu1， HUANG Cheng1， JIA Wei3   

  1. 1．College ofEnergy Resources，Chengdu University ofTechnology，Chengdu 610059，China；2．State Key Laboratory ofOil and Gas Reservoir Geology and Exploitation，Chengdu University ofTechnology，Chengdu 610059，China；3．No．5 Oil Production Plant，Changqing Oilfveld Company，PetroChina，Xi’an 710021，China
  • Online:2010-06-15 Published:2010-06-15

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Abstract:

Cambrian has been an important research aspect during the oil and gas exploration of deep carbonate in Tarim Basin．Based on the analysis of lithostratigraphy，logging stratigraphy，biostratum and seismic stratigraphy， Cambrian in Bachu-Tazhong area of Tarim Basin is divided into three second—order sequences．SSQ1 corresponds to Lower Cambrian，SSQ2 corresponds to Middle Cambrian，and SSQ3 corresponds to Upper Cambrian．These three second-order sequences developed wellin Bachu area．while only SSQ2 and SSQ3 developed in Tacan 1 well which iS located in the uplift in Tazhong area．The forming of second．order sequence is controlled by the cyclicity of tectonic evolution，which demonstrates that Cambrian experienced 3 times of large transgression—regression and 3 phase of vertically depositional evolution：tidal fiat—restricted platform—evaporation platform of Early Cambrian。 to open platform— evaporation platform of Middle Cambrian，and restricted platform of Late Cambrian．

Key words: log recognition, gas-water layer recognition, the second member of Shanxi Form ation, Zizhou Gas Field

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