Journal of Jilin University(Earth Science Edition) ›› 2017, Vol. 47 ›› Issue (6): 1668-1677.doi: 10.13278/j.cnki.jjuese.201706106

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Resource Assessment of Heavy Oil Potential Based on Spatial Grid Interpolation Method:A Case Study of Cretaceous Heavy-Oil Deposits in Zagros Fold Belt

Liu Zuodong1, Wang Hongjun2, Ma Feng1, Wu Zhenzhen1, Du Shang3, Wang Yonghua1   

  1. 1. Department of Global Resources Assessment and Exploration Plan, Petrochina Research Institute of Exploration & Development, Beijing 100083, China;
    2. Department of Asia-Pacific E & P, Petrochina Research Institute of Exploration & Development, Beijing 100083, China;
    3. College of Earth Science, Jilin University, Changchun 130061, China
  • Received:2017-04-09 Online:2017-11-26 Published:2017-11-26
  • Supported by:
    Supported by Key Projects in the National Science & Technology Pillar Program During the Twelfth Five-Year Plan Period (2011ZX05028-002) and Key Project of CNPC Science & Technology (2012E-0501)

Abstract: Heavy oil is characterized by its large viscosity, large-scale continuous accumulation, strong reservoir heterogeneity,and difficult for exploration etc. It is impossible to reveal the difference of heavy oil enrichment in 3D space, and to predict the distribution of the "sweet spots" by using the traditional volumetric method. Based on the geographic information technology,the spatial interpolation method is to take play as a basic evaluation unit to demarcate the distribution area of each unit so as to count and analyze the spatial distribution patterns of the four key parameters incl. reservoir thickness, oil saturation, porosity, and the recovery rate; and then based on actual situation to further select suitable interpolation methods (inverse distance weighted interpolation, Kriging interpolation method etc.), to achieve spatial superposition calculation of the grid maps of the key parameters, and finally to calculate the abundance map of heavy oil of each reservoir formation. This method can quantitatively characterize the spatial distribution of heavy oil resources, and confirm the "sweet spots" of heavy oil. We applied this method to evaluate the potential of heavy oil in the Zagros fold belt in Middle East. According to the evaluation results, the total recoverable heavy oil resources of the four plays (Triassic-Jurassic Butmah, Jurassic, Cretaceous and Tertiary) reaches about 14×109 t. Among them, the Cretaceous play is the favorable exploration target in the future with 8.5×109 t of recoverable heavy oil resources. According to an initial prediction, the "sweet spot" is located at the southwest of the basin.

Key words: heavy oil, resource assessment methodologies, play, interpolation, Zagros fold belt, unconventional

CLC Number: 

  • P618.13
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