Applicability of Geothermal Inflow Performance and Quadratic Drawdown Relationships to Wellbore Output Curve Prediction
- Key words
- Reservoir Engineering; New Zealand; Broadlands; Reservoir Models; Simulation; Drawdowns; Reservoir Pressure; Wellbore Simulators; Deliverability; Output
- Conference
- Geothermal Resources Council Transactions
- Year
- 1991
- Session
- Reservoir modeling; Well testing
- Language
- English
Abstract
The method for predicting full well output curves from only one or two measured points on the curve is reviewed. The importance of this method of accurate feed zone pressure estimates derived form drawdown relationships is discussed. Two existing relationships area examined for their inherent prediction errors. The prediction errors of the recent Iglesias/Moya geothermal inflow performance relationship are found to be significant for a case study well. The more traditional quadratic drawdown relationship is shown to be less susceptible to error, although the calculation of quadratic drawdown indices is not suitable for determining reservoir permeability.
Copyright 1991, Geothermal Resources Council. Readers who download papers from this site should honour the copyright of the original authors, and may not copy or distribute the work further without the permission of the original publisher.