General Pressure Buildup Graphs for Wells in Closed Shapes
Abstract/Contents
- Abstract
- During the last four decades many studies have been done on the pressure-time relationship of a well after it has been shut in, or after a change in production rate. This is a problem of great interest both to oil reservoir engineers and groundwater hydrologists. The research described in this report is primarily concerned with the interpretation of buildup pressure in oil wells after shut in.Buildup tests are performed in oil wells with the purpose of obtaining data which lead t o the determination of well and reservoir properties generally not available by another method, as the average reservoir pressure, the flow capacity (kh), the formation storage, or the porosity, the condition of the reservoir rock near the well bore, etc.This information, combined with laboratory fluid and rock data, production data, and geologic data, afford the means t o make reservoir performance predictions and/or to recommend some operational interventions like well stimulation.A well producing in a closed square or rectangular shape is a very important problem in reservoir engineering because most of the situations found in practice are of this type and studies have been made to solve this problem and to present graphical and tabular results of these solutions.General buildup graphs were prepared for some cases as for a well in the center of closed square (17), for two wells in a 2 x 1 rectangle with water influx (18), and other particular cases.The present study is an attempt to provide the literature with general buildup graphs for wells producing in several positions in most of the Matthews - Brons - Hazebroeck shapes. Although the actual knowledge of the subject have permitted that these graphs have been made some years ago and their evident utility, no attempt has been made to present them as a tool for well test analysis.It is possible, in some conditions, to use the general Homer plots and the Homer method to determine the average porosity of the formation.The method used to accomplish our results is the application of the principle of superposition in time and in space using tables of dimensionless pressures already published.
Description
| Type of resource | text |
|---|---|
| Date created | August 1973 |
Creators/Contributors
| Author | de Andrade, Paulo Jose Villani |
|---|---|
| Primary advisor | Ramey, Jr., Henry J. |
| Degree granting institution | Stanford University, Department of Petroleum Engineering |
Subjects
| Subject | School of Earth Energy & Environmental Sciences |
|---|---|
| Genre | Thesis |
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Preferred citation
- Preferred Citation
- de Andrade, Paulo Jose Villani. (1973). General Pressure Buildup Graphs for Wells in Closed Shapes. Stanford Digital Repository. Available at: https://purl.stanford.edu/xm971jj1515
Collection
Master's Theses, Doerr School of Sustainability
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