Effect of transition from slip to free molecular flow on gas transport in porous media

2007 ◽  
Vol 102 (7) ◽  
pp. 074905 ◽  
Author(s):  
Maria Cecilia Bravo
Keyword(s):  
Porous Media ◽  
Gas Transport ◽  
Molecular Flow ◽  
Free Molecular Flow ◽  
Transport In Porous Media

New equations for binary gas transport in porous media, Part 2: experimental validation

2003 ◽  
Vol 26 (7) ◽  
pp. 717-723 ◽  
Author(s):  
Andrew S. Altevogt ◽  
Dennis E. Rolston ◽  
Stephen Whitaker
Keyword(s):  
Porous Media ◽  
Experimental Validation ◽  
Gas Transport ◽  
Transport In Porous Media

A New Unified Diffusion—Viscous-Flow Model Based on Pore-Level Studies of Tight Gas Formations

SPE Journal ◽  
2012 ◽  
Vol 18 (01) ◽  
pp. 38-49 ◽  
Author(s):  
Mohammad R. Rahmanian ◽  
Roberto Aguilera ◽  
Apostolos Kantzas
Keyword(s):  
Porous Media ◽  
Viscous Flow ◽  
Flow Regime ◽  
Gas Flow ◽  
Flow Model ◽  
Molecular Flow ◽  
Single Element ◽  
Free Molecular Flow ◽  
Flow Through ◽  
Tight Porous Media

Summary In this study, single-phase gas-flow simulation that considers slippage effects through a network of slots and microfractures is presented. The statistical parameters for network construction were extracted from petrographic work in tight porous media of the Nikanassin Group in the Western Canada Sedimentary Basin (WCSB). Furthermore, correlations between Klinkenberg slippage effect and absolute permeability have been developed as well as a new unified flow model in which Knudsen number acts implicitly as a flow-regime indicator. A detailed understanding of fluid flow at microscale levels in tight porous media is essential to establish and develop techniques for economic flow rate and recovery. Choosing an appropriate equation for flow through a single element of the network is crucial; this equation must include geometry and other structural features that affect the flow as well as all variation of fluid properties with pressure. Disregarding these details in a single element of porous media can easily lead to flow misinterpretation at the macroscopic scale. Because of the wide flow-path-size distribution in tight porous media, a variety of flow regimes can exist in the equivalent network. Two distinct flow regimes, viscous flow and free molecular flow, are in either side of this flow-regime spectrum. Because the nature of these two types of flow is categorically different, finding/adjusting a unified flow model is problematic. The complication stems from the fact that the viscosity concept misses its meaning as the flow regime changes from viscous to free molecular flow in which a diffusion-like mechanism dominates. For each specified flow regime, the appropriate equations for different geometries are studied. In addition, different unified flow models available in the literature are critically investigated. Simulation of gas flow through the constructed network at different mean flow pressures leads to investigating the functionality of the Klinkenberg factor with permeability of the porous media and pore-level structure.

Gas transport in porous media under dynamic conditions

1997 ◽  
Vol 38 (1) ◽  
pp. 31-38 ◽  
Author(s):  
Pavel Čapek ◽  
Vladimír Hejtmánek ◽  
Olga Šolcová ◽  
Karel Klusácěk ◽  
Petr Schneider
Keyword(s):  
Porous Media ◽  
Gas Transport ◽  
Dynamic Conditions ◽  
Transport In Porous Media

Anisotropic gas transport in a bilayer membrane in the free molecular flow regime

2012 ◽  
Vol 53 (3) ◽  
pp. 419-423 ◽  
Author(s):  
A. V. Kryukov ◽  
I. M. Kurchatov ◽  
N. I. Laguntsov
Keyword(s):  
Flow Regime ◽  
Gas Transport ◽  
Bilayer Membrane ◽  
Molecular Flow ◽  
Free Molecular Flow
Sign in / Sign up

Export Citation Format

Share Document