Affiliation:
1. Delft University of Technology, Centre for Technical Geoscience
Abstract
Abstract
We present a comprehensive numerical method to calculate well impairment based on steady-state radial flow. It incorporates near-critical relative permeability and saturation dependent inertial resistance.
Example calculations show that near-critical relative permeability and non-Darcy flow are strongly coupled: Inertial resistance gives rise to a higher capillary number, which makes the use of proper near-critical relative permeability curves all the more important. In its turn, the improved mobility of the gas phase due to a higher capillary number enhances the importance of the inertial resistance.
The combined effect of condensate drop-out and non-Darcy flow may cause large skins in gas condensate reservoirs. Well impairment may be grossly overestimated if the dependence of relative permeability on the capillary number is ignored.
P. 181
Cited by
8 articles.
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