Thermal Injection Well Falloff Testing
Abstract/Contents
- Abstract
- This study was conducted to find field case histories from which the swept volume could be determined from pressure transient tests at a thermal injection well. Knowledge of the swept volume permits calculation of important economic parameters including the fuel concentration in a combustion test and heat loss in a steamflood.In an earlier study, a pressure transient model of a two-region reservoir was solved analytically and results demonstrated that in principle, both the permeability-thickness and the swept volume may be determined from a pressure transient test. A typical falloff curve consisted of an initial semilog straight line, a transitional period, and finally, a second semilog straightline. The transition period was found to contain a pseudosteady-state Cartesian straight line whose slope was related to the swept volume. Several sets of field test data were examined to verify the existence of the Cartesian straight line.In order that the swept volume may be calculated from the slope of the Cartesian straight line, the average reservoir pressure and temperature in the swept zone must be estimated. The average pressure is the early-time flattening of the pressure curve on a semilog graph. The average temperature i n a steamflood can be estimated from the average pressure, but average temperature must be calculated for combustion. One method of calculation involves a heat balance which includes both the heat generated by combustion and the heat loss to the overburden.Several case histories are presented from both in-situ combustion and steamflood projects. An investigation f o r each case history shows the information that may be obtained from pressure transient tests. Pressure transient testing of the injection well is useful in evaluating and controlling the performance of thermal recovery projects.
Description
| Type of resource | text |
|---|---|
| Date created | June 1981 |
Creators/Contributors
| Author | Walsh Jr, John W. |
|---|---|
| Advisor | Ramey Jr, Henry J. |
| Advisor | Brigham, William E. |
| 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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- User agrees that, where applicable, content will not be used to identify or to otherwise infringe the privacy or confidentiality rights of individuals. Content distributed via the Stanford Digital Repository may be subject to additional license and use restrictions applied by the depositor.
Preferred citation
- Preferred Citation
- Walsh Jr, John W. (1981). Thermal Injection Well Falloff Testing. Stanford Digital Repository. Available at: https://purl.stanford.edu/pg239zj9524
Collection
Master's Theses, Doerr School of Sustainability
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