| Abstract |
Geothermal reservoir engineering is an inexact science. The engineer is forced to design and operate the reservoir based on a conceptual model gained mainly by inference, not direct observation. One type of data available to the engineer is temperature logs of the injection and production wells before, during, and after operation. In this paper, we present analyses of thermal drawdown and recovery at an injection borehole with different fracture spacings. The goal is to identify patterns in the resulting thermal signatures. We discuss data obtained from testing at the Fenton Hill reservoir and compare our calculations to data. We conclude that thermal signatures, especially thermal recovery, can help the engineer identify flow patterns within the reservoir. |