A mathematical formulation, applicable to both numerical simulation and transient well analysis, that describes the flow of gas in very tight (k infinity less than 0. 1 md) porous media and includes a dual-mechanism transport of gas is developed. Gas is assumed to be traveling under the influence of a concentration field and a pressure field. Transport through the concentration field is a Kundsen flow process and is modeled with Fick's law of diffusion. Transport through the pressure field is a laminar process and is modeled with Darcy's law (inertial/turbulent effects are ignored). The combination of these two flow mechanisms rigorously yields a composition-, pressure-, and saturation-dependent slippage factor.
|Original language||English (US)|
|Number of pages||10|
|Journal||SPE Formation Evaluation|
|State||Published - Feb 1 1986|
All Science Journal Classification (ASJC) codes
- Process Chemistry and Technology