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Volume 40 Issue 4
Jul.  2021
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Article Navigation >  Bulletin of Geological Science and Technology  > 2021  >  40(4): 252-259
Chen Hao, Huang Jixin, Nie Zhiquan, Zhou Jiuning, Shi Xiaoxing. Quantitative characterization of ichnology based on CT scan: A case study of Mackay-Ⅲ oil sands, Canada[J]. Bulletin of Geological Science and Technology, 2021, 40(4): 252-259. doi: 10.19509/j.cnki.dzkq.2021.0419
Citation: Chen Hao, Huang Jixin, Nie Zhiquan, Zhou Jiuning, Shi Xiaoxing. Quantitative characterization of ichnology based on CT scan: A case study of Mackay-Ⅲ oil sands, Canada[J]. Bulletin of Geological Science and Technology, 2021, 40(4): 252-259. doi: 10.19509/j.cnki.dzkq.2021.0419
shu

Quantitative characterization of ichnology based on CT scan: A case study of Mackay-Ⅲ oil sands, Canada

doi: 10.19509/j.cnki.dzkq.2021.0419
  • Received Date: 30 Sep 2020
    Abstract
  • Based on high-resolution core photos, CT scan pictures, and well logging, the classification, features and spatial distributions of trace fossils in McMurray Formation, Lower Cretaceous, Mackay-III oil sands, Canada, were characterized quantitatively.Based on lithofacies, a new parameter, bioturbation comprehensive index(BCI), was proposed by combining bioturbation index(BI), size diversity index(SDI), and the mean grain size of hostrock.A three-dimension BCI model was built by sequential Gaussian stochastic simulation.Results show that there are nine lithofacies and nine genera trace fossils in McMurray Formation.Lithofacies were dominated by oil saturated medium-grained sandstone, high bioturbation fine-grained sandstone, and high bioturbation muddy siltstone.Trace fossils were dominated by Skoliths, Palaeophycus, and Planolites. According to BCI model, the study area was subdivided into Type Ⅰ weak Bioturbation(BCI < 1.5), Type Ⅱ moderate bioturbation(1.5<BCI < 3) and Type Ⅲ strong bioturbation(BCI>3).This paper provides a novel method and process to characterize the features and spatial distributions of trace fossils quantitatively.

     

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