Measuring and testing – With fluid pressure – Porosity or permeability
Patent
1996-06-19
1998-08-04
Williams, Hezron E.
Measuring and testing
With fluid pressure
Porosity or permeability
G01N 1508
Patent
active
057896623
ABSTRACT:
A method and apparatus are provided which determine the spatial distribution of fluids in a porous media contained in a three-dimensional cell as such fluids migrate through porous media in response to a vacuum-induced pressure differential. Specifically, the method comprises: (a) providing a three-dimensional cell including a front side and a back side, each of which are at least semi-transparent; (b) installing at least two slotted casing wells at opposing ends of the cell, at least one first slotted casing well capable of being de-pressurized and at least one second slotted casing well capable of allowing air entry into the cell; (c) filling the cell with a porous media; (d) introducing at least one fluid into the filled cell and allowing the fluid to infiltrate the porous media; (e) sealing the infiltrated, filled cell; (f) de-pressurizing the first slotted casing, thereby creating a negative pressure gradient across the infiltrated, filled cell; and (g) measuring the saturation of the fluid in the porous media at each location of interest across the plane of the front side of the three-dimensional cell. A method of use is also provided for employing the present apparatus in a pilot-scale experiment for the feasibility of recovering non-aqueous phase liquids (NAPLs) by a vacuum-based technique, such as soil vapor extraction (SVE) and vacuum-enhanced recovery (VER), depending upon the volatility of NAPL of interest.
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Politzer Jay L.
Williams Hezron E.
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