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Article Navigation >  PETROLEUM GEOLOGY & EXPERIMENT  > 2017  >  39(4): 556-561
Lu Chengang, Zhang Suian, Mao Xiaoxiao, Zhao Difei. Quantitative characterization of microscopic pore heterogeneity in tight sandstones and its reservoir significance: A case study of the Shanxi Formation in X area, Ordos Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2017, 39(4): 556-561. doi: 10.11781/sysydz201704556
Citation: Lu Chengang, Zhang Suian, Mao Xiaoxiao, Zhao Difei. Quantitative characterization of microscopic pore heterogeneity in tight sandstones and its reservoir significance: A case study of the Shanxi Formation in X area, Ordos Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2017, 39(4): 556-561. doi: 10.11781/sysydz201704556
shu

Quantitative characterization of microscopic pore heterogeneity in tight sandstones and its reservoir significance: A case study of the Shanxi Formation in X area, Ordos Basin

doi: 10.11781/sysydz201704556
  • 1.

    Coalbed Methane Research Center, China University of Petroleum, Beijing 102200, China

  • 2. College of Petroleum Engineering, China University of Petroleum, Beijing 102200,China

  • 3. College of Geosciences, China University of Petroleum, Beijing 102200,China

  • 4. School of Resources and Earth Science, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China

  • 5. Key Laboratory of CBM Resource and Reservoir-generating Process, China Ministry of Education, Xuzhou, Jiangsu 221008, China

  • Received Date: 2017-01-07
  • Rev Recd Date: 2017-05-28
  • Publish Date: 2017-07-28
    Abstract
  • This paper presents a new method to extract the face rate of casting a thin section image of tight sandstones from the Shanxi Formation in the eastern Ordos Basin based on Matlab software programming. A heterogeneity coefficient U is proposed according to face rate, which quantitatively characterizes microscopic pore heterogeneity. The reser-voir significance of the heterogeneity coefficient U and the relationship between reservoir physical properties and microscopic pore heterogeneity were discussed. The results show that the micro-heterogeneity of the tight sandstone reservoirs in X area is very strong and the micro-pore distribution is very heterogeneous. A larger heterogeneity coefficient U and a stronger reservoir heterogeneity is associated with poorer reservoir physical properties, and vice versa.The microscopic heterogeneity of tight sandstone reservoirs influenced the microscopic development characteristics of pore space (reservoir space and permeability). The quantitative evaluation of the heterogeneity coefficient of tight sandstone reservoirs can guide the selection of high-quality strata for production.

     

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