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A novel Kozeny-Carman-based permeability model for hydrate-bearing sediments
- Source :
- Energy. 234:121203
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- Permeability governs fluid flow in hydrate-bearing sediments (HBSs) and directly affects gas production efficiency. Reported models relating permeability to hydrate saturation are usually embedded with parameters whose physical meaning is not clear or difficult to determine. It limits their applicability in numerical simulations and practices. In this study, we proposed an innovative permeability-hydrate saturation model based on the Poiseuille's law and the Kozeny-Carman equation. The proposed model has single one parameter, the void ratio, which is physically sound and easily determined. This model was verified by experimental data and other existing models, and proved to have a satisfying performance in predicting the permeability of HBSs. The prediction results reached an asymptote in the range of kmeas/2≤kpredict≤2kmeas. For a given hydrate saturation, the normalized permeability decreases nonlinearly as void ratio increases. The sensitivity of permeability of HBS to changes in void ratio is higher at high hydrate saturation. Overall, the proposed model can capture the main feature of permeability with hydrate saturation for coarse-grained HBS. The remaining uncertainty in this model underscores the important role of hydrate distribution, heterogeneity, anisotropy, and pore geometry of HBSs that are not characterized by the hydrate saturation and the void ratio.
- Subjects :
- Materials science
020209 energy
Mechanical Engineering
02 engineering and technology
Building and Construction
Mechanics
Hagen–Poiseuille equation
Pollution
Industrial and Manufacturing Engineering
Permeability (earth sciences)
Kozeny–Carman equation
Void ratio
General Energy
020401 chemical engineering
0202 electrical engineering, electronic engineering, information engineering
Fluid dynamics
0204 chemical engineering
Electrical and Electronic Engineering
Asymptote
Hydrate
Anisotropy
Civil and Structural Engineering
Subjects
Details
- ISSN :
- 03605442
- Volume :
- 234
- Database :
- OpenAIRE
- Journal :
- Energy
- Accession number :
- edsair.doi...........4ba42fab776be22a0a832ef0f286a1e0