Nitrogen gas permeability tests at Avery Island

Several nitrogen gas permeability tests have been performed at the Avery Island field site. These included a preliminary suite of tests performed at various locations around the site, tests performed in conjunction with the brine movement studies, and a series of extended permeability measurements. As a result of the preliminary tests and the brine movement tests, further tests were justified to refine the measurement technique and resolve observed anomalies. This report presents data acquired during the extended permeability measurements at Avery Island, analysis of the data, and comparison of the data with a finite-element simulation. Permeabilities were found as low as 4 x 10/sup -20/ ft/sup 2/ and as high as 6 x 10/sup -17/ ft/sup 2/ with a tendency of permeability decreasing as temperatures increased.