Method for determining permeability
AssigneeColumbia Gas System Service Corporation
InventorPaul D. Schettler, Jr.
Life of this patent
Estimating the term…
Abstract
The permeability of samples, especially rock samples, is determined by immersing the sample in a dye solution to permit dye to diffuse into the sample, rinsing remaining dye solution from the surface and then either placing the rinsed sample in a leachback solution to permit dye to diffuse out into the leachback liquid or else simply allowing the dye to diffuse out onto the surface of the sample, thereby causing a coloration indicative of the permeability of the sample. The method can be practiced on slab samples or drill cuttings.
Claims13
A method for determining the permeability of a sample, said method comprising:
- contacting said sample with a dye solution for a dyeing period sufficient to permit dye from said dye solution to diffuse into said sample;
- separating said sample from said dye solution and rinsing remaining dye solution from the surface of said sample;
- and
- placing said rinsed sample in a leachback liquid for a leachback period sufficient to permit said dye from said rinsed sample to diffuse into said leachback liquid;
- and
- measuring the amount of said dye which has diffused from said rinsed sample into said leachback liquid.
Dependencies are inferred from the claim text.