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Volume 17 Issue 2
Jun 2006
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Hong-qi LI, Yin-fu XIE, Zhong-chun SUN, Xing-ping LUO. Logging Data High-Resolution Sequence Stratigraphy. Journal of Earth Science, 2006, 17(2): 173-180.
Citation: Hong-qi LI, Yin-fu XIE, Zhong-chun SUN, Xing-ping LUO. Logging Data High-Resolution Sequence Stratigraphy. Journal of Earth Science, 2006, 17(2): 173-180.

Logging Data High-Resolution Sequence Stratigraphy

Funds:

the Main Project of the National Tenth Five-Year Plan 

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  • Corresponding author: XIE Yin-fu,E-mail:xieyinfu@163.com
  • Received Date: 15 Aug 2005
  • Accepted Date: 25 Mar 2006
  • The recognition and contrast of bed sets in parasequence is difficult in terrestrial basin high-resolution sequence stratigraphy. This study puts forward new methods for the boundary identification and contrast of bed sets on the basis of manifold logging data. The formation of calcareous interbeds, shale resistivity differences and the relation of reservoir resistivity to altitude are considered on the basis of log curve morphological characteristics, core observation, cast thin section, X-ray diffraction and scanning electron microscopy. The results show that the thickness of calcareous interbeds is between 0.5 m and 2 m, increasing on weathering crusts and faults. Calcareous interbeds occur at the bottom of a distributary channel and the top of a distributary mouth bar. Lower resistivity shale (4-5 Ω · m) and higher resistivity shale (> 10Ω·m) reflect differences in sediment fountain or sediment microfacies. Reservoir resistivity increases with altitude. Calcareous interbeds may be a symbol of recognition for the boundary of bed sets and isochronous contrast bed sets, and shale resistivity differences may confirm the stack relation and connectivity of bed sets. Based on this, a high-resolution chronostratigraphic frame- work of Xi-1 segment in Shinan area, Junggar basin is presented, and the connectivity of bed sets and oil-water contact is confirmed. In this chronostratigraphic framework, the growth order, stack mode and space shape of bed sets are qualitatively and quantitatively described.

     

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