Using Artificial Neural Network and Sequential Predictive Probability Method to Mechanize Interpretation of Well Test Data
Abstract/Contents
- Abstract
- We propose a robust way of achieving a well test interpretation by combining the sequential predictive probability method with an artificial neural network approach. The sequential predictive probability method considers all possible reservoir models and determines which candidate model or models best predict the well response. This method is dependent on obtaining good initial estimates for the parameters governing the candidate reservoir models, which is achieved by applying the artificial neural network approach. We use the neural network to identify the characteristic components of the pressure derivative curve corresponding to the flow regimes known to be in each candidate model. Reservoir parameters are then computed using the data in the identified range of the corresponding behavior.As a final step, the candidate models and their initial estimates are evaluated using the sequential probability method. The method discriminates between the candidate models and simultaneously performs nonlinear regression to compute the best estimates of reservoir parameters.The trained neural network was able to identify the characteristic components of the derivative curve in most cases. The algorithm written to interpret the neural network signals into flow regimes required special procedures to take care of the misclassification from the neural network. The initial estimates of reservoir parameters from the neural network were found to be reasonably close to the eventual estimates from the sequential predictive probability method.
Description
| Type of resource | text |
|---|---|
| Date created | June 1995 |
Creators/Contributors
| Author | Athichanagorn, Suwat |
|---|---|
| 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
- Athichanagorn, Suwat. (1995). Using Artificial Neural Network and Sequential Predictive Probability Method to Mechanize Interpretation of Well Test Data. Stanford Digital Repository. Available at: https://purl.stanford.edu/ct751cp8531
Collection
Master's Theses, Doerr School of Sustainability
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