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Transient flow through porous rocks studied by PEPI
B Issa1, M A Al-Mugheiry, P Mansfield
1Department of Physics, University Nottingham, UK.
Magnetic Resonance Imaging
|January 1, 1996
Summary
Researchers studied transient fluid flow in porous rocks using high-speed echo-planar imaging. Different rock properties led to distinct flow settling times and velocity changes during flow rate adjustments.
Area of Science:
- Geophysics
- Fluid Dynamics
- Materials Science
Background:
- Understanding fluid flow in porous media is crucial for various geoscience and engineering applications.
- Characterizing transient flow behavior is complex due to dynamic changes in velocity and saturation.
Purpose of the Study:
- To investigate the transient behavior of fluid flow in porous rocks under changing flow rates.
- To analyze how rock properties like porosity and permeability influence transient flow dynamics.
Main Methods:
- Utilized high-speed pi-modified echo-planar imaging (PEPI) for spatially resolved flow mapping.
- Examined two sandstone samples with varying porosity and permeability.
Main Results:
- Observed distinct rise and fall settling times for different rock samples during transient flow.
- Quantified changes in velocity, flow area, and velocity distribution variance during the approach to steady state.
Conclusions:
- Rock properties significantly impact the transient fluid flow response.
- PEPI is an effective technique for visualizing and quantifying dynamic flow processes in porous media.