A Method for Static-Based Reservoir Model Up-Gridding
Abstract/Contents
- Abstract
- A method for up-gridding geostatistical reservoir models is proposed.The method generates a well-adapted coarse-grid for a given realization and target coarse-scale dimensions. While most current grid generation methods are based on either local or global dynamic (flow rate dependent) measures, it is shown that the inclusion of both local and global static information, can greatly improve computational cost while maintaining accurate flow response. Static property information is analyzed to infer a measure of spatially variability in terms of the relative influence of connected bodies on reservoir flow response. These bodies consist of well-connected permeability that fall within a range of permeability values. Such permeability categories are optimized to the target coarse dimensions based on the frequency distribution of body size. Bodies may have a strong impact on local and global flow behavior; knowledge of the relative location of such bodies in a given realization may render an accurate coarse-scale representation of the fine scale models in terms of flow response. A rigorous mathematical definition of such connected bodies is developed, and some heuristic properties are defined to show why the method works in practice.An investigation of the method under a set of realistic synthetic cases including 2D and 3D reservoirs is conducted. Sensitivity to geological heterogeneity, and to flow boundary conditions are considered for various scale-up ratios. The results indicate accurate reproductions of the flow simulation response when compared to that of the fine scale realizations. A comparative analysis of the method with well-established static methods is conducted,and shows a considerable gain in computational efficiency with comparable accuracy.
Description
| Type of resource | text |
|---|---|
| Date created | June 2002 |
Creators/Contributors
| Author | Younis, Rami M. |
|---|---|
| Primary advisor | Caers, Jef |
| Degree granting institution | Stanford University, Department of Petroleum Engineering |
Subjects
| Subject | School of Earth Energy & Environmental Sciences |
|---|---|
| Genre | Thesis |
Bibliographic information
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Preferred citation
- Preferred Citation
- Younis, Rami M. (2002). A Method for Static-Based Reservoir Model Up-Gridding. Stanford Digital Repository. Available at: https://purl.stanford.edu/wt319hc2488
Collection
Master's Theses, Doerr School of Sustainability
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