Analysis of Error Sources for Estimating Geothermal Stabilised Formation Temperatures Using Analytical and Rigorous Methods
- Key words
- Static formation temperature, bottom-hole temperatures, error propagation, shut-in time, circulation time
- Conference
- Australian Geothermal Energy Conference
- Year
- 2009
- Language
- English
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Abstract
Analytical and rigorous solutions of 7 heat transfer models were statistically evaluated, for the estimation of stabilized formation temperatures (SFT) of geothermal wells. Linear and cylindrical heat source models were selected to represent the heat flow processes present in wells drilling operations. A statistical assessment of the main error sources involved with these models was comprehensively performed. Analytical and rigorous solutions were evaluated by using comprehensive statistical methodologies which enabled to determine the sensitivity parameters that should be considered for a reliable calculation of SFT, as well as to define the constraints where the analytical and rigorous methods provide consistent SFT estimations.
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