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The Study on the Influence of Acidification on the Pore and Seepage Field of Carbonate Reservoir

  • Shuai Cui
  • Houbin LiuEmail author
  • Teng Liu
  • Anran Yu
  • Xu Han
Conference paper
Part of the Mechanisms and Machine Science book series (Mechan. Machine Science, volume 75)

Abstract

The mineral composition and content distribution of carbonate rocks in QiXia reservoir formation and porosity and permeability parameters at different acidification time are measured by laboratory experiments. The dynamic changes of pore pressure and borehole wall seepage field during acid fracturing process were simulated by software, the results show that acidification has a significant effect on the porosity and permeability characteristics. The porosity increases as a whole and there are differences in permeability changes. During the production process after acid fracturing, pore pressure relief in the borehole wall varies with the different drawdown pressure. The conductivity of crack seepage is significantly higher than that of base rock. The higher the drawdown pressure is, the greater the crack pore pressure relief, and the larger the reduction range and the influence area of the pore pressure around the well will be. The conductivity of acid fracturing crack is higher than that of the reservoir base rock, and the permeability of matrix is weak. The higher the drawdown pressure difference is, the higher the decreasing amplitude of pore pressure around acid fracturing cracks is, the faster the pressure relief speed is, and the larger the influence area is.

Keywords

Carbonate rock Acidification Matrix Fracture Pore Seepage field 

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Copyright information

© Springer Nature Switzerland AG 2020

Authors and Affiliations

  • Shuai Cui
    • 1
  • Houbin Liu
    • 1
    • 2
    Email author
  • Teng Liu
    • 1
  • Anran Yu
    • 1
  • Xu Han
    • 1
  1. 1.School of Petroleum and Natural Gas EngineeringSouthwest Petroleum UniversityChengduChina
  2. 2.State Key Laboratory of Oil and Gas Reservoir Geology and ExploitationSouthwest Petroleum UniversityChengduChina

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