Representation of wells in numerical reservoir simulation
In reservoir simulation, linear approximations are generally used for well modeling. However, this type of approximations can be inaccurate for fluid flow calculation in the vicinity of wells leading to incorrect well performance predictions. To overcome such problems, a new well representation has been proposed that uses a ``logarithmic`` type of approximation for vertical wells. In this paper, it is shown how the new well model can be easily implemented in existing simulator through the conventional PI. The relationship between wellbore pressure, wellblock pressure and flow rate is discussed in more detail, especially for the definition of wellblock pressure. Extension of the new approach to off-center wells and to flexible grids are both presented. Through this extension, the equivalence of various gridding techniques for the well model is emphasized. The key element is the accurate calculation of flow components in the vicinity of wells.
- OSTI ID:
- 153075
- Report Number(s):
- CONF-950206-; TRN: IM9602%%167
- Resource Relation:
- Conference: Symposium on reservoir simulation, San Antonio, TX (United States), 12-15 Feb 1995; Other Information: PBD: 1995; Related Information: Is Part Of 13. Symposium on reservoir simulation: Proceedings; PB: 572 p.
- Country of Publication:
- United States
- Language:
- English
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