Effect of Stress Sensitive Permeability, Skin and Wellbore Storage on High Velocity Flow in Gas Well Tests
Abstract/Contents
- Abstract
- Wellbore storage, skin effect, non-Darcy flow and pressure-sensitive formations were considered in a numerical solution for transient gas well test analysis in a one-dimensional radial flow by Fligelman (1981). His approach has been used in the present study to verify classical correlations published in the gas engineering literature which do not consider the practical effects simultaneously.A method for correcting early time transient pressures for wellbore storage effects, introduced by Gladfelter et al. (1955), and first applied to real gas pressure drawdown by Rarney (1965, 1976) was found to be useful in the present work when non-Darcy effects exist. It is possible to use this method in drawdown well test interpretation to evaluate the true skin, and estimate the formation permeability using early time data. The non-Darcy parameter may be obtained in a single flow period. Some of the correlations developed by Jenkins and Aronofsky (1952, 1953) for ideal-gas flow in a one-dimensional radial reservoir were verified in this study. Real gas properties, skin and non-Darcy effects, and pressure sensitive formations were considered. The drainage radius concept was extended to the real gas potential with the above conditions and the results obtained match Jenkins and Aronofsky conclusions for ideal gas.An important conclusion is the influence of formation damage or pressure sensitive-formation on non-Darcy parameter D. Both skin effect and the reduction of permeability near the wellbore in pressure-sensitive formations cause large variations in D and may be determined as proposed in this study.
Description
| Type of resource | text |
|---|---|
| Date created | November 1987 |
Creators/Contributors
| Author | Couri, Francisco Roberto |
|---|---|
| Primary advisor | Ramey Jr., Henry J. |
| Degree granting institution | Stanford University, Department of Petroleum Engineering |
Subjects
| Subject | School of Earth Energy & Environmental Sciences |
|---|---|
| Subject | Stanford Geothermal Program |
| Genre | Thesis |
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Preferred citation
- Preferred Citation
- Couri, Francisco Roberto. (1987). Effect of Stress Sensitive Permeability, Skin and Wellbore Storage on High Velocity Flow in Gas Well Tests. Stanford Digital Repository. Available at: https://purl.stanford.edu/tr793xd3959
Collection
Master's Theses, Doerr School of Sustainability
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