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Related Experiment Videos

Critical Condensate Saturation in Porous Media.

Wang1, Mohanty

  • 1Department of Chemical Engineering, University of Houston, Houston, Texas, 77204-4792

Journal of Colloid and Interface Science
|May 26, 1999
PubMed
Summary
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This study develops a pore-scale network model to predict critical condensate saturation in gas-condensate reservoirs. The model accurately captures flow behavior influenced by pore geometry and fluid properties.

Area of Science:

  • Petroleum Engineering
  • Multiphase Flow in Porous Media
  • Reservoir Simulation

Background:

  • Effective exploitation of gas-condensate reservoirs relies on understanding gas and condensate flow.
  • Critical condensate saturation and relative permeabilities are crucial for evaluating recovery strategies.

Purpose of the Study:

  • To develop a mechanistic network model for critical condensate saturation.
  • To examine phase trapping and pore-corner connectivity at the pore scale.

Main Methods:

  • Modeling porous media as interconnected pore bodies and throats.
  • Characterizing pore elements by connectivity, shape, and radius distributions.
  • Identifying pore-level flow laws from micromodel experiments with near-critical fluids.

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Main Results:

  • A nonzero critical condensate saturation can occur without contact angle hysteresis due to converging-diverging pore throats.
  • Critical flow saturation depends on pore geometry, water saturation, and interfacial tension (Bond number).
  • The cubic pore network model accurately predicts critical condensate saturation trends for sandstones, outperforming the modified sphere-pack model.

Conclusions:

  • The developed network model provides a mechanistic understanding of critical condensate saturation.
  • Pore geometry, particularly the converging-diverging nature of throats, significantly influences condensate flow.
  • The cubic model offers a reliable approach for predicting critical condensate saturation in reservoir simulations.