Journal of Jilin University(Earth Science Edition) ›› 2018, Vol. 48 ›› Issue (1): 307-317.doi: 10.13278/j.cnki.jjuese.20160305

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3D Modeling of Digital Core Based on X-ray Computed Tomography

Lin Chengyan1,2, Wang Yang1,2, Yang Shan3, Ren Lihua1,2, You Chunmei4, Wu Songtao5, Wu Yuqi1,2, Zhang Yimin1,2   

  1. 1. School of Geosciences, China University of Petroleum(East China), Qingdao 266580, Shandong, China;
    2. Reservoir Geology Key Laboratory of Shandong Province, Qingdao 266580, Shandong, China;
    3. Exploration and Development Research Institute of Southwest Oil & Gas Field Company, PetroChina, Chengdu 610051, China;
    4. Research Institute of Exploration and Development of Daqing Oilfield Company Ltd, Daqing 163000, Heilongjiang, China;
    5. Research Institute of Petroleum Exploration and Development, Beijing 100083, China
  • Received:2016-10-20 Online:2018-01-26 Published:2018-01-26
  • Supported by:
    Supported by National Science and Technology Major Project(2016ZX05054012)

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Abstract: In order to study the micropore structure of petroleum reservoir and develop 3D micro percolation model, CT(computed tomography)scanning and image processing of typical low- permeability reservoirs were carried out in the H152 area of the middle section of Shahejie Formation in Dongying depression, and a micro digital core model was established. Then, through the analysis and calculation of the model, the reservoir pore throat network model attributions of different scales of pores and throats were displayed intuitively and clearly in three-dimensional space. Based on the analysis and calculation of dynamic and static parameters such as pore structure, porosity, permeability and pressure drop, a micro percolation model of reservoir samples was established. According to the comparison of algorithm and analysis of the parameters, it is concluded that:Compared with the traditional median filter, the non-local-means filter algorithm that based on the comparison of similarity and the accuracy of the model is improved; The CT-based digital core can provide a reliable digital model for geological research; Based on the assumption of isobaric surface, the numerical simulation of percolation was carried out, and the characteristics of fluid transport were analyzed. The numerical simulation of percolation provides a new way to reveal the transport law of low permeability reservoir.

Key words: digital core, pore structure, pore-network model, modeling, micro percolation, computed tomography, Dongying depression

CLC Number: 

  • TE122.2
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