Transient Quasi-Static Gas Flow through a Rigid Porous Medium with Double Porosity
Résumé
The highly compressible fl uid fl ow through a three-scales rigid porous medium (pore, fracture, macroscopic sample) is investigated using a homogenization method. The macroscopic description is strongly dependent on the separation of the different scales, and three cases are considered. The pores either play the role of a compressible fluid reservoir, introduce a memory effect, or are ignored, respectively. The homogenization result is compared to classical phenomenological models that are available in the case of slightly compressible fl uids. Pseudo-steady state models are shown to give a rough description of the phenomenon.
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