Journal of Jilin University(Earth Science Edition) ›› 2016, Vol. 46 ›› Issue (2): 610-616.doi: 10.13278/j.cnki.jjuese.201602305

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Research on Flow Patterns and Evolution Characteristics of Low Permeable Fractured Reservoir Based on Well Test Data: A Case from Huoshaoshan Oilfield in Junggar Basin

Liu Renqiang1, Duan Yonggang2, Tan Fengqi3, Liu Hongxian4, Qu Huailin5   

  1. 1. School of Geoscience and Technology, Southwest Petroleum University, Chengdou 610500, China;
    2. School of Petroleum Engineering, Southwest Petroleum University, Chengdou 610500, China;
    3. Key Laboratory Computational Geodynamics, CAS, Beijing 100049, China;
    4. Karamay Vocational & Technical College, Karamay 834000, Xinjiang, China;
    5. Research Institute of Petroleum Exploration and Development, Xinjiang Oilfield Company, Karamay 834000, Xinjiang, China
  • Received:2015-05-25 Published:2016-03-26
  • Supported by:

    Supported by National Science and Technology Major Project of the Ministry of Science and Technology of China (2011ZX05026-001-07)

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Abstract:

It is still very difficult to determine the seepage characteristics and evolution pattern of a low permeable heterogeneous reservoir after many years' development by water injection, especially those reservoirs that have been dealt with by many different methods to increase their productivity. In this paper, the reservoir models of the low permeable fractured reservoirs in Huoshaoshan oilfield are identified, and the evolution patterns of the reservoir flow systems in different development stages are also analyzed. There are many natural fractures in Huoshaoshan oilfield, and a lots of them are developed by use of fracturing mode;therefore the reservoir models in initial development are mainly manufacturing fractures or dual pore model. During development, the flow characteristics of production well change to single pore model and the flow characteristics of injection well change to radial fitting model caused by decreasing of formation pressure and the application of deep profile control technology. The evolution of flow systems changes the effective permeability of reservoir, and makes it decrease gradully over the whole process. The initial reservoir effective permeability field fits to water channeling characteristics of oil well, and the decreasing tendency of the effective permeability also fits to the decrease of rising rate of water in the research area. The above results provide important bases for further adjustment and development to the feasibility of reservoir evaluation.

Key words: transient well testing, fractured reservoir, flow patterns, evolution characteristic, effective permeability, Huoshaoshan oilfield

CLC Number: 

  • P631.8

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