Wellbore Effects in the Analysis of Two-Phase Geothermal Well Tests
- 1 June 1982
- journal article
- Published by Society of Petroleum Engineers (SPE) in Society of Petroleum Engineers Journal
- Vol. 22 (03) , 309-320
- https://doi.org/10.2118/9922-pa
Abstract
A method of designing and analyzing pressure transient well tests of two-phase (steam/water) reservoirs is given. Wellbore storage is taken into account, and the duration of it is estimated. It is shown that the wellbore flow can dominate the downhole pressure signal completely such that large changes in the downhole pressure that might be expected because of changes in kinematic mobility are not seen. Changes in the flowing enthalpy from the reservoir can interact with the wellbore flow so that a temporary plateau in the downhole transient curve is measured. Application of graphical and nongraphical methods to determine reservoir parameters from drawdown tests is demonstrated.Keywords
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