(n). Well Testing. Permeability that is the same in all directions. This never really occurs, but permeability along various directions of aformation is often close enough for calculation purposes. See: Directional Permeability
Schlumberger Ltd. (The World's Leading Supplier Of Technology, Integrated Project Management And Information Solutions to Customers Working in The Oil and Gas Industry Worldwide), Schlumberger Oilfield Glossary Cedex, France 2014. http://www.glossary.oilfield.slb.com/en/Terms/sym/ a.aspx, (Ergo - Brit) {766}