Aspects of geothermal well test analysis in fractured reservoirs

Several numerical experiments comparing the response of a fractured geothermal reservoir with that of a uniform reservoir are reported. A constant rate drawdown test followed by a buildup test is investigated for both an initially two-phase reservoir and an initially liquid reservoir which flashes during the test. Also, cold water injection into a two-phase reservoir is considered. In all cases the fracturing of the reservoir significantly changes the results for the uniform reservoir, and makes interpretation of the well test results more difficult.