Dual Porosity Models of Near-Well Behaviour of a Discharging Well
- Key words
- numerical simulation, dual- or double-porosity model, MINC
- Conference
- New Zealand Geothermal Workshop
- Year
- 2012
- Session
- 05. Geothermal Engineering - Reservoir Modelling
- Language
- English
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Abstract
The presence of fractures in a reservoir may significantly affect the behaviour of a discharging well and complicate the interpretation of drawdown/build-up well tests. Here simple radial models, in both single- and dual-porosity form, are used to investigate the near-well behaviour during a drawdown/build-up well test. The dual-porosity model is implemented with the multiple interacting continua or MINC system (Pruess and Narasimhan, 1982; Pruess and Narasimhan, 1985). For the dual-porosity model, the effect on near-well behaviour of important parameters such as fracture volume fraction, matrix permeability and fracture spacing is evaluated. The results are compared with those for a uniform porous (single-porosity) model.
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