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Article Navigation >  PETROLEUM GEOLOGY & EXPERIMENT  > 2017  >  39(6): 805-811
Ren Jiangli, Zhu Yushuang, Liu Linyu, Wang Wei, Wang Zhenchuan, Chen Dayou. Micro-flow characteristics and controls of Chang 4+5 reservoirs in the western Nanliang oil field, Ordos Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2017, 39(6): 805-811. doi: 10.11781/sysydz201706805
Citation: Ren Jiangli, Zhu Yushuang, Liu Linyu, Wang Wei, Wang Zhenchuan, Chen Dayou. Micro-flow characteristics and controls of Chang 4+5 reservoirs in the western Nanliang oil field, Ordos Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2017, 39(6): 805-811. doi: 10.11781/sysydz201706805
shu

Micro-flow characteristics and controls of Chang 4+5 reservoirs in the western Nanliang oil field, Ordos Basin

doi: 10.11781/sysydz201706805
  • 1.

    State Key Laboratory of Continental Dynamics/Department of Geology, Northwest University, Xi'an, Shaanxi 710069, China

  • 2. Oil and Gas Exploitation Company, Yanchang Petroleum, Yan'an, Shaanxi 716000, China

  • 3. Bailie School of Petroleum Engineering, Lanzhou City University, Lanzhou, Gansu 730070, China

  • Received Date: 2017-03-07
  • Rev Recd Date: 2017-09-26
  • Publish Date: 2017-11-28
    Abstract
  • A model of real sandstones was applied to study the micro-flow characteristics and oil displacement efficiency of the Chang 4+5 reservoirs in the western Nanliang oil field to improve the efficiency of water flooding. The micro-structure was studied with casting thin sections, scanning electron microscopy and mercury injection in order to estimate the influences of reservoir characteristics and micro-flow experiment factors on water flooding efficiency. The results showed that the Chang 4+5 reservoirs were dominated by homogeneous seepage, while finger-type seepage and net-type seepage also existed locally. The homogeneous seepage resulted in the highest final oil saturation and final displacement efficiency. For the internal factors affecting displacement efficiency, heterogeneity played a key role, and reservoir wettability was also important. Permeability was positively related to oil displacement efficiency, while porosity had a weak influence on oil displacement efficiency. Two external factors, water injection pressure and volume multiple, could enhance displacement efficiency, and the influence of pressure was more significant.

     

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