The Effect of External Boundaries on a Reservoir with a Pinchout
Abstract/Contents
- Abstract
- Previous workers have shown that a semi-infinite reservoir with a pinchout boundary is characterized by spherical flow at long time. As a result, the presence of a pinchout should be recognizable from pressure-drawdown data by the appearance of a straight line on a graph of pressure vs reciprocal square root of time. However, external boundaries of the system may be felt before spherical flow is established. This problem was studied by creating boundaries in the semi-infinite reservoir, using infinite-array superposition of the pinchout source function. Three partially closed systems were produced: 1) two parallel vertical boundaries normal to the pinchout; 2) a vertical boundary opposite the pinchout; 3) a second pinchout opposite the first.Values of pressure vs time have been calculated for each of these cases.It was found that the characteristic straight line begins at a time tD/dD2=5. This line would appear only if the external boundaries in the direction orthogonal to the pinchout were more than 5 times as distant from the well as the pinchout, and if boundaries in the direction parallel to the pinchout were more than 8 times as distant.
Description
| Type of resource | text |
|---|---|
| Date created | July 1982 |
Creators/Contributors
| Author | Gerard, Matthew G. |
|---|---|
| Primary advisor | Horne, Roland N. |
| 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
- Gerard, Matthew G. (1982). The Effect of External Boundaries on a Reservoir with a Pinchout. Stanford Digital Repository. Available at: https://purl.stanford.edu/tv435zz8814
Collection
Master's Theses, Doerr School of Sustainability
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