The beta factor, or Non-Darcy flow coefficient is the critical parameter in determining the performance of propped hydraulic fractures in gas wells. In addition, non-Darcy effects enter into the analysis of laboratory-derived gas permeametry data, of reservoir core, and its extrapolation to the field.

In this paper, both the beta factor and the Klinkenberg slip constant are investigated. Flow tests under carefully controlled conditions have been completed in consolidated and unconsolidated media. Anomalies in the beta factor can be readily dealt with as far as proppant packs are concerned, but their implications for gas permeametry in consolidated core may be more serious.

You can access this article if you purchase or spend a download.