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- Title
On the Identifiability of Relative Permeability and Foam Displacement Parameters in Porous Media Flow.
- Authors
Ribeiro, L. S.; Miranda, G. B.; Rocha, B. M.; Chapiro, G.; Santos, R. Weber dos
- Abstract
This study focuses on analyzing parameter identifiability in foam displacement models during two‐phase flow in porous media, with a particular emphasis on calibrating relative permeability and foam parameters. We employ the profile likelihood technique and Bayesian inference for identifiability analysis. Successful parameter estimation is demonstrated through steady‐state experiments for relative permeability and foam quality scan experiments when both types of experimental data are available and obtained from the same core sample. However, non‐identifiability issues arise when only foam quality scan data is accessible. Additionally, we investigated a standard practice that fits foam parameters using foam quality scan data obtained from one core sample and permeability values obtained from another core sample, but from the same reservoir. Our results show that this practice is ineffective in correctly estimating foam parameters, leading to misestimation of crucial foam model parameters. These findings underscore the importance of a mandatory relative permeability experiment on a representative core sample from the reservoir for accurate characterization of foam parameters. Without it, misestimation of foam model parameters hinders the proper understanding of foam effects on sweeping porous media. Plain Language Summary: Using foam during water and gas injection in porous media enhances efficiency but requires careful parameter calibration. Computer simulations aid understanding, but when relying on limited data, some parameters may be challenging to estimate accurately. Our study focuses on identifying parameters in foam displacement models, crucial for correctly characterizing foam effects. We show that fitting relative permeability on unrelated core samples is ineffective, leading to misestimation. To accurately understand the impact of foam on porous media, a mandatory relative permeability experiment on a representative core from the reservoir is essential. Non‐identifiable parameters hinder proper foam model characterization, emphasizing the importance of comprehensive experimental approaches. Key Points: Parameter misestimation and non‐identifiability issues hinders foam flow models in porous media when working with limited experimental dataDifferent scenarios underscore the importance of Bayesian inference and profile likelihood in parameter identifiability analysisIt is essential to characterize relative permeability on a representative core sample before estimation of foam model parameters
- Subjects
POROUS materials; FOAM; PERMEABILITY; TWO-phase flow; DRILL core analysis; GAS injection
- Publication
Water Resources Research, 2024, Vol 60, Issue 3, p1
- ISSN
0043-1397
- Publication type
Article
- DOI
10.1029/2023WR036751