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Explainable machine-learning-based prediction of equivalent circulating density using surface-based drilling data
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Explainable machine-learning-based prediction of equivalent circulating density using surface-based drilling data
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Journal Article
Explainable machine-learning-based prediction of equivalent circulating density using surface-based drilling data
2024
Overview
When drilling wells for energy explorations, it is important to regulate the formation pressures appropriately to prevent kicks, which can lead to unimaginable loss of lives and properties. This is usually done by controlling the equivalent circulating density (ECD), which responds to the dynamic conditions that occur during drilling. The conventional approach to determine ECD is via mathematical modeling or downhole measurements. However, the downhole measurement tools can be very expensive, and the mathematical models do not provide a high degree of accuracy. Some previous authors have proposed using machine learning (ML) techniques to improve the degree of accuracy of the ECD predictions. In this work, we employed an extreme gradient-boosting (XGBoost) methodology to predict ECD values. The model's accuracy was determined using correlation coefficients (R
2
) and root mean square errors (RMSE) as their performance metrics. The results showed a strong prediction capability with an R
2
and RMSE of 1.00 and 0.0005 for the training data and an R
2
and RMSE of 0.989 and 0.023 for the testing/blind data set, respectively. The developed model outperformed those obtained using other popular machine learning techniques. Lastly, an interpretation of the model results showed that mud weight, weight on hook, and standpipe pressure contributed the most to the ECD prediction values.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
