| Abstract |
Dimensionless flowrate type curves were applied to steam wells at the Geysers in an attempt to quantify reservoir properties and to predict flowrate decline. Although data scatter was a problem, the flowrate data was smoothed by a normalization routine based on the back-pressure equation and the wells were modeled by dimensionless functions for a radial system with a infinite o r finite outer boundary and a constant pressure inner boundary (composite analytical empirical type curve). The "match" resulted in a unique .D. value for use in Arps' equation and k permeability-thickness product (kh) comparable to kh values obtained from pressure buildup analysis. Finally, it was shown that at least four years of data is required to obtain a unique b value. |